According to the versions of the qemu package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL     dereference) when the command header 'ad->cur_cmd' is null. (CVE-2019-12067)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the qemu package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL     dereference) when the command header 'ad->cur_cmd' is null. (CVE-2019-12067)

  - hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address     in an msi-x mmio operation. (CVE-2020-13754)

  - QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c     mishandles a write operation in the SDHC_BLKSIZE case. (CVE-2020-25085)

  - pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because     pci_get_bus() might not return a valid pointer. (CVE-2020-25742)

  - hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check     before an ide_cancel_dma_sync call. (CVE-2020-25743)

  - eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest     can crash the QEMU process via packet data that lacks a valid Layer 3 protocol. (CVE-2020-27617)

  - A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.
    This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO     operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial     of service. This flaw affects QEMU versions prior to 5.2.0. (CVE-2020-27821)

  - ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of     header data even if that exceeds the total packet length. (CVE-2020-29129)

  - ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer     index is not validated. (CVE-2020-29443)

  - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.
    This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of     service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)

  - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in     versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw     allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.
    The highest threat from this vulnerability is to system availability. (CVE-2020-35505)

  - A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This     flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges     on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as     system availability. (CVE-2021-20181)

  - An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It     may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A     privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
    (CVE-2021-20203)

  - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of     QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an     interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said     issue while updating controller state fields and their subsequent processing. A privileged guest user may     use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)

  - A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI     I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req'     from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the     host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.
    (CVE-2021-3392)

  - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions     up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get     bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the     host resulting in DoS scenario. (CVE-2021-3416)

  - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a     single, large transfer request, to reduce the overhead and improve performance. The combined size of the     bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper     validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the     array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a     denial of service. (CVE-2021-3527)

  - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions     up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-     gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)

  - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of     QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-     user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit     this issue to leak memory from the host. (CVE-2021-3545)

  - An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of     QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET'     command from the guest. It could allow a privileged guest user to crash the QEMU process on the host,     resulting in a denial of service condition, or potential code execution with the privileges of the QEMU     process. (CVE-2021-3546)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the bootp_input() function and could occur while processing a udp packet that is smaller than     the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of     uninitialized heap memory from the host. The highest threat from this vulnerability is to data     confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3593)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3595)

  - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs     when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A     malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,     resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the     host. (CVE-2021-3682)

  - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions     prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-     bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this     flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the     host. (CVE-2021-3713)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

このxen用更新プログラムでは、次の問題を修正します：

CVE-2018-12207：信頼できない仮想マシンが、Intel CPUの命令フェッチユニットを使用して、ページサイズの変更中にマシン例外を引き起こし、CPUコアが機能しなくなる可能性のある競合状態を修正しました（bsc#1155945 XSA-304）。

CVE-2018-19965：非正規アドレスを含むINVPCIDを使用しようとするDoSを修正しました（bsc#1115045 XSA-279）。

CVE-2019-11135：トランザクションメモリをサポートするIntel CPU上の非同期TSX操作の中止は、前述の「マイクロアーキテクチャデータサンプリング」攻撃と同様に、マイクロアーキテクチャバッファからのサイドチャネル情報漏洩の促進に利用される可能性がありました。（bsc#1152497 XSA-305）。

CVE-2019-12067：QEMU AHCI内のNULLポインターデリファレンスを修正しました（bsc#1145652）。

CVE-2019-12068：スクリプトの実行中の無限ループを修正しました（bsc#1146874）。

CVE-2019-12155：スパイスリソースの解放中のNULLポインターデリファレンスを修正しました（bsc#1135905）。

CVE-2019-14378：slirpネットワーキング実装でのパケット再アセンブリ中のヒープバッファオーバーフローを修正しました（bsc#1143797）。

CVE-2019-15890：パケットリアセンブリ中のメモリ解放後使用を修正しました（bsc#1149813）。

CVE-2019-17340：大規模なホスト上の許可テーブル転送の問題を修正しました（XSA-284 bsc#1126140）。

CVE-2019-17341：パススルーデバイスホットプラグに伴う競合を修正しました（XSA-285 bsc#1126141）。

CVE-2019-17342：page_structアクセス規則に違反しているsteal_pageを修正しました（XSA-287 bsc#1126192）。

CVE-2019-17343：一貫性のないPV IOMMU規則を修正しました（XSA-288 bsc#1126195）。

CVE-2019-17344：x86 PVページテーブル検証に欠落していたプリエンプションを修正しました（XSA-290 bsc#1126196）。

CVE-2019-17347：PVカーネルコンテキストスイッチの破損を修正しました（XSA-293 bsc#1126201）。

CVE-2019-18420：悪意のあるx86 PVゲストによって引き起こされ、サービス拒否につながる可能性のあるハイパーバイザークラッシュを修正しました（bsc#1154448 XSA-296）。

CVE-2019-18421：悪意のあるPVゲスト管理者による権限昇格を修正しました（bsc#1154458 XSA-299）。

CVE-2019-18424：信頼できないドメインによる物理デバイスへのDMAを通した権限昇格を修正しました（bsc#1154461 XSA-302）。

CVE-2019-18425：32ビットPVゲスト使用モードからの権限昇格を修正しました（bsc#1154456 XSA-298）。

CVE-2019-19577：悪意のあるゲスト管理者が、Xenに変更中のデータ構造へのアクセスを可能にしてクラッシュにつながる可能性のある問題を修正しました（bsc#1158007 XSA-311）。

CVE-2019-19578：悪意があるまたはバグがあるPVゲストが、ハイパーバイザーのクラッシュを引き起こし、ホスト全体に影響するサービス拒否につながる可能性のある問題を修正しました（bsc#1158005 XSA-309）。

CVE-2019-19579：物理デバイスにアクセス可能な信頼できないドメインがホストメモリにDMAできる、権限昇格を修正しました（bsc#1157888 XSA-306）。

CVE-2019-19580：悪意のあるPVゲスト管理者が、自分の権限をホストの権限に昇格できる可能性のある権限昇格を修正しました（bsc#1158006 XSA-310）。

CVE-2019-19581：32ビットArm上の領域外の可能性を修正しました（bsc#1158003 XSA-307）。

CVE-2019-19583：HVM/PVHゲストユーザー空間コードでゲストをクラッシュさせ、ゲストのサービス拒否につながる可能性のある不適切なチェックを修正しました（bsc#1158004 XSA-308）。

注意：Tenable Network Securityは、前述の記述ブロックをSUSEセキュリティアドバイザリから直接抽出しています。Tenableでは、そこに新しい問題を追加することはせずに、できる限り自動的に整理と書式設定をするようにしています。

Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - QEMU 中 ide/ahci.c 的 ahci_commit_buf 函数允许攻击者在命令标头“ad->cur_cmd”为空时造成拒绝服务（空取消引用）。(CVE-2019-12067)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - 在 QEMU 中，ide/ahci.c 的 ahci_commit_buf 函式允許攻擊者在命令標頭「ad->cur_cmd」為 null 時，造成拒絕服務 (NULL 解除參照)。(CVE-2019-12067)

請注意，Nessus 依賴供應商報告的套件存在。

リモートの SUSE Linux SLES11ホストには、SUSE-SU-2019:14199-1 のアドバイザリに記載された複数の脆弱性の影響を受けるパッケージがインストールされています。

  - QEMU の ide/ahci.c の ahci_commit_buf 関数により、コマンドヘッダー「ad-> cur_cmd」が null の場合に、攻撃者がサービス拒否 (NULL デリファレンス) を引き起こす可能性があります。(CVE-2019-12067)

  - QEMU 1:4.1-1、1:2.1+dfsg-12+deb8u6、1:2.8+dfsg-6+deb9u8、1:3.1+dfsg-8~deb10u1、1:3.1+dfsg-8+deb10u2、および 1:2.1+dfsg-12+deb8u12 (修正済) で、lsi_execute_script() のスクリプトを実行する際に、LSI scsi アダプターエミュレーターが「s->dsp」インデックスを進めて次の opcode を読み取ります。これにより、次のopcodeが空の場合、無限ループが発生する可能性があります。no-op opcodeもカバーするように、10,000回の反復後に既存のループ終了を移動します。
    (CVE-2019-12068)

  - QEMU 3.1.x ～ 4.0.0 の hw/display/qxl.c の interface_release_resource に、NULL ポインターデリファレンスが含まれています。
    (CVE-2019-12155)

  最初のフラグメントを含む場合を不適切に処理するため、libslirp 4.0.0においてip_input.cのip_reassに、大きなパケットを介したヒープベースのバッファオーバーフローがあります。(CVE-2019-14378)

  - libslirp 4.0.0は、QEMU 4.1.0で使用される場合、ip_input.c内のip_reassにおけるメモリ解放後使用(Use-After-Free)があります。(CVE-2019-15890)

  - 4.11.x までの Xen で、付与テーブルの転送リクエストが不適切に処理されるため、x86 ゲスト OS ユーザーがサービス拒否を引き起こしたり、権限を取得したりする問題が発見されました。(CVE-2019-17340)

  - 4.11.x までの Xen で、x86 PV ゲスト OS ユーザーが、パススルー PCI デバイスの追加中にページ書き込み可能性の競合状態を利用して、サービス拒否を引き起こしたり、権限を取得したりする問題が発見されました。(CVE-2019-17341)

  - 4.11.x までの Xen で、x86 PV ゲスト OS ユーザーが、XENMEM_exchange の導入時に発生する競合状態を利用して、サービス拒否を引き起こしたり、権限を取得したりする問題が発見されました。
    (CVE-2019-17342)

  - 4.11.x までの Xen で、x86 PV ゲスト OS ユーザーが、PV ドメインに対する HVM physmap コンセプトの不適切な使用を利用して、サービス拒否を引き起こしたり、権限を取得したりする問題が発見されました。(CVE-2019-17343)

  - 4.11.x までの Xen で、x86 PV ゲスト OS ユーザーが、PTE 更新の再起動性をサポートするために存在する長時間実行の操作を利用して、サービス拒否を引き起こす問題が発見されました。
    (CVE-2019-17344)

  - 4.11.x までの Xen で、プロセスコンテキスト識別子 (PCID) と TLB フラッシュの間に互換性がないため、x86 PV ゲスト OS ユーザーがサービス拒否を引き起こしたり、権限を取得したりする問題が発見されました。(CVE-2019-17346)

  - 4.11.x までの Xen で、ゲストが Linux (および場合によっては他のゲストカーネル) と互換性のない方法で仮想化された ％cr4 を操作できるため、x86 PV ゲスト OS ユーザーがサービス拒否を引き起こしたり、権限を取得したりする問題が発見されました。(CVE-2019-17347)

  - 4.11.x までの Xen で、プロセスコンテキスト識別子 (PCID) とシャドウページテーブルスイッチングの間に互換性がないため、x86 PV ゲスト OS ユーザーがサービス拒否を引き起こす問題が発見されました。
    (CVE-2019-17348)

Nessus はこの問題をテストしておらず、代わりにアプリケーションの自己報告されたバージョン番号にのみ依存しています。

Linux/Unix ホストには、ベンダーが提供するパッチが利用できない脆弱性の影響を受ける複数のパッケージがインストールされています。

  - QEMU の ide/ahci.c の ahci_commit_buf 関数により、コマンドヘッダー「ad-> cur_cmd」が null の場合に、攻撃者がサービス拒否 (NULL デリファレンス) を引き起こす可能性があります。(CVE-2019-12067)

Nessus は、ベンダーによって報告されたパッケージの存在に依存していることに注意してください。

According to the versions of the qemu packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL     dereference) when the command header 'ad->cur_cmd' is null. (CVE-2019-12067)

  - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e     packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)

  - QEMU 5.0.0 has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not     checked. (CVE-2020-25084)

  - pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because     pci_get_bus() might not return a valid pointer. (CVE-2020-25742)

  - hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check     before an ide_cancel_dma_sync call. (CVE-2020-25743)

  - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.
    This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of     service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)

  - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in     versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw     allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.
    The highest threat from this vulnerability is to system availability. (CVE-2020-35505)

  - A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while     processing read/write ioport commands if the selected floppy drive is not initialized with a block device.
    This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of     service. The highest threat from this vulnerability is to system availability. (CVE-2021-20196)

  - An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It     may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A     privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
    (CVE-2021-20203)

  - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of     QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an     interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said     issue while updating controller state fields and their subsequent processing. A privileged guest user may     use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)

  - A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator     of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw     allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a     denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20255)

  - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions     up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-     gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)

  - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of     QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-     user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit     this issue to leak memory from the host. (CVE-2021-3545)

  - An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of     QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET'     command from the guest. It could allow a privileged guest user to crash the QEMU process on the host,     resulting in a denial of service condition, or potential code execution with the privileges of the QEMU     process. (CVE-2021-3546)

  - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs     when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A     malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,     resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the     host. (CVE-2021-3682)

  - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the     descriptor's address belongs to the non direct access region, due to num_buffers being set after the     virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a     denial of service condition, or potentially execute code on the host with the privileges of the QEMU     process. (CVE-2021-3748)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen fixes the following issues :

CVE-2018-12207: Fixed a race condition where untrusted virtual machines could have been using the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional (bsc#1155945 XSA-304).

CVE-2018-19965: Fixed a DoS from attempting to use INVPCID with a non-canonical addresses (bsc#1115045 XSA-279).

CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate side-channel information leaks out of microarchitectural buffers, similar to the previously described 'Microarchitectural Data Sampling' attack. (bsc#1152497 XSA-305).

CVE-2019-12067: Fixed a NULL pointer dereference in QEMU AHCI (bsc#1145652).

CVE-2019-12068: Fixed an infinite loop while executing script (bsc#1146874).

CVE-2019-12155: Fixed a NULL pointer dereference while releasing spice resources (bsc#1135905).

CVE-2019-14378: Fixed a heap buffer overflow during packet reassembly in slirp networking implementation (bsc#1143797).

CVE-2019-15890: Fixed a use-after-free during packet reassembly (bsc#1149813).

CVE-2019-17340: Fixed grant table transfer issues on large hosts (XSA-284 bsc#1126140).

CVE-2019-17341: Fixed a race with pass-through device hotplug (XSA-285 bsc#1126141).

CVE-2019-17342: Fixed steal_page violating page_struct access discipline (XSA-287 bsc#1126192).

CVE-2019-17343: Fixed an inconsistent PV IOMMU discipline (XSA-288 bsc#1126195).

CVE-2019-17344: Fixed a missing preemption in x86 PV page table unvalidation (XSA-290 bsc#1126196).

CVE-2019-17347: Fixed a PV kernel context switch corruption (XSA-293 bsc#1126201).

CVE-2019-18420: Fixed a hypervisor crash that could be caused by malicious x86 PV guests, resulting in a denial of service (bsc#1154448 XSA-296).

CVE-2019-18421: Fixed a privilege escalation through malicious PV guest administrators (bsc#1154458 XSA-299).

CVE-2019-18424: Fixed a privilege escalation through DMA to physical devices by untrusted domains (bsc#1154461 XSA-302).

CVE-2019-18425: Fixed a privilege escalation from 32-bit PV guest used mode (bsc#1154456 XSA-298).

CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311).

CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309).

CVE-2019-19579: Fixed a privilege escalation where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306).

CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310).

CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307).

CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace code to crash the guest, leading to a guest denial of service (bsc#1158004 XSA-308).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the qemu packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL     dereference) when the command header 'ad->cur_cmd' is null. (CVE-2019-12067)

  - A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while     processing read/write ioport commands if the selected floppy drive is not initialized with a block device.
    This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of     service. The highest threat from this vulnerability is to system availability. (CVE-2021-20196)

  - A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator     of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw     allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a     denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20255)

  - An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing     transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid     values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The     highest threat from this vulnerability is to system availability. (CVE-2021-20257)

  - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the     descriptor's address belongs to the non direct access region, due to num_buffers being set after the     virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a     denial of service condition, or potentially execute code on the host with the privileges of the QEMU     process. (CVE-2021-3748)

  - A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the     Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be     written to the controller's registers and trigger undesirable actions (such as reset) while the device is     still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could     use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or     potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects     QEMU versions before 7.0.0. (CVE-2021-3750)

  - An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE     SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious     guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
    (CVE-2021-3930)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2019:14199-1 advisory.

  - The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL     dereference) when the command header 'ad->cur_cmd' is null. (CVE-2019-12067)

  - In QEMU 1:4.1-1, 1:2.1+dfsg-12+deb8u6, 1:2.8+dfsg-6+deb9u8, 1:3.1+dfsg-8~deb10u1, 1:3.1+dfsg-8+deb10u2,     and 1:2.1+dfsg-12+deb8u12 (fixed), when executing script in lsi_execute_script(), the LSI scsi adapter     emulator advances 's->dsp' index to read next opcode. This can lead to an infinite loop if the next opcode     is empty. Move the existing loop exit after 10k iterations so that it covers no-op opcodes as well.
    (CVE-2019-12068)

  - interface_release_resource in hw/display/qxl.c in QEMU 3.1.x through 4.0.0 has a NULL pointer dereference.
    (CVE-2019-12155)

  - ip_reass in ip_input.c in libslirp 4.0.0 has a heap-based buffer overflow via a large packet because it     mishandles a case involving the first fragment. (CVE-2019-14378)

  - libslirp 4.0.0, as used in QEMU 4.1.0, has a use-after-free in ip_reass in ip_input.c. (CVE-2019-15890)

  - An issue was discovered in Xen through 4.11.x allowing x86 guest OS users to cause a denial of service or     gain privileges because grant-table transfer requests are mishandled. (CVE-2019-17340)

  - An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service     or gain privileges by leveraging a page-writability race condition during addition of a passed-through PCI     device. (CVE-2019-17341)

  - An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service     or gain privileges by leveraging a race condition that arose when XENMEM_exchange was introduced.
    (CVE-2019-17342)

  - An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service     or gain privileges by leveraging incorrect use of the HVM physmap concept for PV domains. (CVE-2019-17343)

  - An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service     by leveraging a long-running operation that exists to support restartability of PTE updates.
    (CVE-2019-17344)

  - An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service     or gain privileges because of an incompatibility between Process Context Identifiers (PCID) and TLB     flushes. (CVE-2019-17346)

  - An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service     or gain privileges because a guest can manipulate its virtualised %cr4 in a way that is incompatible with     Linux (and possibly other guest kernels). (CVE-2019-17347)

  - An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service     because of an incompatibility between Process Context Identifiers (PCID) and shadow-pagetable switching.
    (CVE-2019-17348)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL     dereference) when the command header 'ad->cur_cmd' is null. (CVE-2019-12067)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
160618	EulerOS Virtualization 2.9.1 : qemu (EulerOS-SA-2022-1596)	Nessus	Huawei Local Security Checks	2022/5/5	2022/5/5	medium
157171	EulerOS 2.0 SP9 : qemu (EulerOS-SA-2022-1014)	Nessus	Huawei Local Security Checks	2022/1/28	2023/11/17	high
133763	SUSE SLES12セキュリティ更新プログラム：xen （SUSE-SU-2020:0388-1）	Nessus	SuSE Local Security Checks	2020/2/18	2024/3/27	critical
222568	Linux Distros 未修补的漏洞: CVE-2019-12067	Nessus	Misc.	2025/3/4	2025/9/3	medium
222568	Linux Distros 未修補弱點：CVE-2019-12067	Nessus	Misc.	2025/3/4	2025/9/3	medium
150593	SUSE SLES11セキュリティ更新プログラム: xen (SUSE-SU-2019:14199-1)	Nessus	SuSE Local Security Checks	2021/6/10	2022/1/21	high
222568	Linux Distros のパッチ未適用の脆弱性: CVE-2019-12067	Nessus	Misc.	2025/3/4	2025/9/3	medium
159867	EulerOS Virtualization 2.10.1 : qemu (EulerOS-SA-2022-1392)	Nessus	Huawei Local Security Checks	2022/4/18	2023/11/1	high
160613	EulerOS Virtualization 2.9.0 : qemu (EulerOS-SA-2022-1619)	Nessus	Huawei Local Security Checks	2022/5/5	2022/5/5	medium
159876	EulerOS Virtualization 2.10.0 : qemu (EulerOS-SA-2022-1418)	Nessus	Huawei Local Security Checks	2022/4/18	2023/11/1	high
133763	SUSE SLES12 Security Update : xen (SUSE-SU-2020:0388-1)	Nessus	SuSE Local Security Checks	2020/2/18	2024/3/27	critical
165872	EulerOS Virtualization 3.0.6.6 : qemu (EulerOS-SA-2022-2533)	Nessus	Huawei Local Security Checks	2022/10/9	2023/10/10	high
157200	EulerOS 2.0 SP9 : qemu (EulerOS-SA-2022-1034)	Nessus	Huawei Local Security Checks	2022/1/28	2023/11/17	high
150593	SUSE SLES11 Security Update : xen (SUSE-SU-2019:14199-1)	Nessus	SuSE Local Security Checks	2021/6/10	2022/1/21	high
222568	Linux Distros Unpatched Vulnerability : CVE-2019-12067	Nessus	Misc.	2025/3/4	2025/9/3	medium

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