Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* a flaw was found in the Unidirectional Lightweight Encapsulation (ULE) implementation. A remote attacker could send a specially crafted ISO MPEG-2 Transport Stream (TS) frame to a target system, resulting in an infinite loop (denial of service). (CVE-2010-1086, Important)

* on AMD64 systems, it was discovered that the kernel did not ensure the ELF interpreter was available before making a call to the SET_PERSONALITY macro. A local attacker could use this flaw to cause a denial of service by running a 32-bit application that attempts to execute a 64-bit application. (CVE-2010-0307, Moderate)

* a flaw was found in the kernel connector implementation. A local, unprivileged user could trigger this flaw by sending an arbitrary number of notification requests using specially crafted netlink messages, resulting in a denial of service. (CVE-2010-0410, Moderate)

* a flaw was found in the Memory-mapped I/O (MMIO) instruction decoder in the Xen hypervisor implementation. An unprivileged guest user could use this flaw to trick the hypervisor into emulating a certain instruction, which could crash the guest (denial of service).
(CVE-2010-0730, Moderate)

* a divide-by-zero flaw was found in the azx_position_ok() function in the driver for Intel High Definition Audio, snd-hda-intel. A local, unprivileged user could trigger this flaw to cause a kernel crash (denial of service). (CVE-2010-1085, Moderate)

This update also fixes the following bugs :

* in some cases, booting a system with the 'iommu=on' kernel parameter resulted in a Xen hypervisor panic. (BZ#580199)

* the fnic driver flushed the Rx queue instead of the Tx queue after fabric login. This caused crashes in some cases. (BZ#580829)

* 'kernel unaligned access' warnings were logged to the dmesg log on some systems. (BZ#580832)

* the 'Northbridge Error, node 1, core: -1 K8 ECC error' error occurred on some systems using the amd64_edac driver. (BZ#580836)

* in rare circumstances, when using kdump and booting a kernel with 'crashkernel=128M@16M', the kdump kernel did not boot after a crash.
(BZ#580838)

* TLB page table entry flushing was done incorrectly on IBM System z, possibly causing crashes, subtle data inconsistency, or other issues.
(BZ#580839)

* iSCSI failover times were slower than in Red Hat Enterprise Linux 5.3. (BZ#580840)

* fixed floating point state corruption after signal. (BZ#580841)

* in certain circumstances, under heavy load, certain network interface cards using the bnx2 driver and configured to use MSI-X, could stop processing interrupts and then network connectivity would cease. (BZ#587799)

* cnic parts resets could cause a deadlock when the bnx2 device was enslaved in a bonding device and that device had an associated VLAN.
(BZ#581148)

* some BIOS implementations initialized interrupt remapping hardware in a way the Xen hypervisor implementation did not expect. This could have caused a system hang during boot. (BZ#581150)

* AMD Magny-Cours systems panicked when booting a 32-bit kernel.
(BZ#580846)

Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-4537     Fabian Yamaguchi reported a missing check for Ethernet     frames larger than the MTU in the r8169 driver. This may     allow users on the local network to crash a system,     resulting in a denial of service.

  - CVE-2010-0727     Sachin Prabhu reported an issue in the GFS2 filesystem.
    Local users can trigger a BUG() altering the permissions     on a locked file, resulting in a denial of service.

  - CVE-2010-1083     Linus Torvalds reported an issue in the USB subsystem,     which may allow local users to obtain portions of     sensitive kernel memory.

  - CVE-2010-1084     Neil Brown reported an issue in the Bluetooth subsystem     that may permit remote attackers to overwrite memory     through the creation of large numbers of sockets,     resulting in a denial of service.

  - CVE-2010-1086     Ang Way Chuang reported an issue in the DVB subsystem     for Digital TV adapters. By creating a specially-encoded     MPEG2-TS frame, a remote attacker could cause the     receiver to enter an endless loop, resulting in a denial     of service.

  - CVE-2010-1087     Trond Myklebust reported an issue in the NFS filesystem.
    A local user may cause an oops by sending a fatal signal     during a file truncation operation, resulting in a     denial of service.

  - CVE-2010-1088     Al Viro reported an issue where automount symlinks may     not be followed when LOOKUP_FOLLOW is not set. This has     an unknown security impact.

  - CVE-2010-1162     Catalin Marinas reported an issue in the tty subsystem     that allows local attackers to cause a kernel memory     leak, possibly resulting in a denial of service.

  - CVE-2010-1173     Chris Guo from Nokia China and Jukka Taimisto and Olli     Jarva from Codenomicon Ltd reported an issue in the SCTP     subsystem that allows a remote attacker to cause a     denial of service using a malformed init package.

  - CVE-2010-1187     Neil Hormon reported an issue in the TIPC subsystem.
    Local users can cause a denial of service by way of a     NULL pointer dereference by sending datagrams through     AF_TIPC before entering network mode.

  - CVE-2010-1437     Toshiyuki Okajima reported a race condition in the     keyring subsystem. Local users can cause memory     corruption via keyctl commands that access a keyring in     the process of being deleted, resulting in a denial of     service.

  - CVE-2010-1446     Wufei reported an issue with kgdb on the PowerPC     architecture, allowing local users to write to kernel     memory. Note: this issue does not affect binary kernels     provided by Debian. The fix is provided for the benefit     of users who build their own kernels from Debian source.

  - CVE-2010-1451     Brad Spengler reported an issue on the SPARC     architecture that allows local users to execute     non-executable pages.

This update also includes fixes a regression introduced by a previous update. See the referenced Debian bug page for details.

It was discovered that the Linux kernel did not correctly handle memory protection of the Virtual Dynamic Shared Object page when running a 32-bit application on a 64-bit kernel. A local attacker could exploit this to cause a denial of service. (Only affected Ubuntu 6.06 LTS.) (CVE-2009-4271)

It was discovered that the r8169 network driver did not correctly check the size of Ethernet frames. A remote attacker could send specially crafted traffic to crash the system, leading to a denial of service. (CVE-2009-4537)

Wei Yongjun discovered that SCTP did not correctly validate certain chunks. A remote attacker could send specially crafted traffic to monopolize CPU resources, leading to a denial of service. (Only affected Ubuntu 6.06 LTS.) (CVE-2010-0008)

It was discovered that KVM did not correctly limit certain privileged IO accesses on x86. Processes in the guest OS with access to IO regions could gain further privileges within the guest OS. (Did not affect Ubuntu 6.06 LTS.) (CVE-2010-0298, CVE-2010-0306, CVE-2010-0419)

Evgeniy Polyakov discovered that IPv6 did not correctly handle certain TUN packets. A remote attacker could exploit this to crash the system, leading to a denial of service. (Only affected Ubuntu 8.04 LTS.) (CVE-2010-0437)

Sachin Prabhu discovered that GFS2 did not correctly handle certain locks. A local attacker with write access to a GFS2 filesystem could exploit this to crash the system, leading to a denial of service.
(CVE-2010-0727)

Jamie Strandboge discovered that network virtio in KVM did not correctly handle certain high-traffic conditions. A remote attacker could exploit this by sending specially crafted traffic to a guest OS, causing the guest to crash, leading to a denial of service. (Only affected Ubuntu 8.04 LTS.) (CVE-2010-0741)

Marcus Meissner discovered that the USB subsystem did not correctly handle certain error conditions. A local attacker with access to a USB device could exploit this to read recently used kernel memory, leading to a loss of privacy and potentially root privilege escalation.
(CVE-2010-1083)

Neil Brown discovered that the Bluetooth subsystem did not correctly handle large amounts of traffic. A physically proximate remote attacker could exploit this by sending specially crafted traffic that would consume all available system memory, leading to a denial of service. (Ubuntu 6.06 LTS and 10.04 LTS were not affected.) (CVE-2010-1084)

Jody Bruchon discovered that the sound driver for the AMD780V did not correctly handle certain conditions. A local attacker with access to this hardward could exploit the flaw to cause a system crash, leading to a denial of service. (CVE-2010-1085)

Ang Way Chuang discovered that the DVB driver did not correctly handle certain MPEG2-TS frames. An attacker could exploit this by delivering specially crafted frames to monopolize CPU resources, leading to a denial of service. (Ubuntu 10.04 LTS was not affected.) (CVE-2010-1086)

Trond Myklebust discovered that NFS did not correctly handle truncation under certain conditions. A local attacker with write access to an NFS share could exploit this to crash the system, leading to a denial of service. (Ubuntu 10.04 LTS was not affected.) (CVE-2010-1087)

Al Viro discovered that automount of NFS did not correctly handle symlinks under certain conditions. A local attacker could exploit this to crash the system, leading to a denial of service. (Ubuntu 6.06 LTS and Ubuntu 10.04 LTS were not affected.) (CVE-2010-1088)

Matt McCutchen discovered that ReiserFS did not correctly protect xattr files in the .reiserfs_priv directory. A local attacker could exploit this to gain root privileges or crash the system, leading to a denial of service. (CVE-2010-1146)

Eugene Teo discovered that CIFS did not correctly validate arguments when creating new files. A local attacker could exploit this to crash the system, leading to a denial of service, or possibly gain root privileges if mmap_min_addr was not set. (CVE-2010-1148)

Catalin Marinas and Tetsuo Handa discovered that the TTY layer did not correctly release process IDs. A local attacker could exploit this to consume kernel resources, leading to a denial of service.
(CVE-2010-1162)

Neil Horman discovered that TIPC did not correctly check its internal state. A local attacker could send specially crafted packets via AF_TIPC that would cause the system to crash, leading to a denial of service. (Ubuntu 6.06 LTS was not affected.) (CVE-2010-1187)

Masayuki Nakagawa discovered that IPv6 did not correctly handle certain settings when listening. If a socket were listening with the IPV6_RECVPKTINFO flag, a remote attacker could send specially crafted traffic that would cause the system to crash, leading to a denial of service. (Only Ubuntu 6.06 LTS was affected.) (CVE-2010-1188)

Oleg Nesterov discovered that the Out-Of-Memory handler did not correctly handle certain arrangements of processes. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2010-1488).

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

This update fixes a several security issues and various bugs in the SUSE Linux Enterprise 10 SP 2 kernel. The bugs fixed include a serious data corruption regression in NFS.

The following security issues were fixed :

  - drivers/net/r8169.c in the r8169 driver in the Linux     kernel does not properly check the size of an Ethernet     frame that exceeds the MTU, which allows remote     attackers to (1) cause a denial of service (temporary     network outage) via a packet with a crafted size, in     conjunction with certain packets containing A characters     and certain packets containing E characters; or (2)     cause a denial of service (system crash) via a packet     with a crafted size, in conjunction with certain packets     containing '0' characters, related to the value of the     status register and erroneous behavior associated with     the RxMaxSize register. (CVE-2009-4537)

  - The ULE decapsulation functionality in     drivers/media/dvb/dvb-core/dvb_net.c in dvb-core in the     Linux kernel arlier allows attackers to cause a denial     of service (infinite loop) via a crafted MPEG2-TS frame,     related to an invalid Payload Pointer ULE.
    (CVE-2010-1086)

  - fs/namei.c in Linux kernel does not always follow NFS     automount 'symlinks,' which allows attackers to have an     unknown impact, related to LOOKUP_FOLLOW.
    (CVE-2010-1088)

  - Stack-based buffer overflow in the hfs subsystem in the     Linux kernel allows remote attackers to have an     unspecified impact via a crafted Hierarchical File     System (HFS) filesystem, related to the hfs_readdir     function in fs/hfs/dir.c. (CVE-2009-4020)

  - The processcompl_compat function in     drivers/usb/core/devio.c in the Linux kernel does not     clear the transfer buffer before returning to userspace     when a USB command fails, which might make it easier for     physically proximate attackers to obtain sensitive     information (kernel memory). (CVE-2010-1083)

  - drivers/connector/connector.c in the Linux kernel allows     local users to cause a denial of service (memory     consumption and system crash) by sending the kernel many     NETLINK_CONNECTOR messages. (CVE-2010-0410)

From Red Hat Security Advisory 2010:0394 :

Updated kernel packages that fix multiple security issues, several bugs, and add three enhancements are now available for Red Hat Enterprise Linux 4.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security fixes :

* RHSA-2009:1024 introduced a flaw in the ptrace implementation on Itanium systems. ptrace_check_attach() was not called during certain ptrace() requests. Under certain circumstances, a local, unprivileged user could use this flaw to call ptrace() on a process they do not own, giving them control over that process. (CVE-2010-0729, Important)

* a flaw was found in the kernel's Unidirectional Lightweight Encapsulation (ULE) implementation. A remote attacker could send a specially crafted ISO MPEG-2 Transport Stream (TS) frame to a target system, resulting in a denial of service. (CVE-2010-1086, Important)

* a use-after-free flaw was found in tcp_rcv_state_process() in the kernel's TCP/IP protocol suite implementation. If a system using IPv6 had the IPV6_RECVPKTINFO option set on a listening socket, a remote attacker could send an IPv6 packet to that system, causing a kernel panic. (CVE-2010-1188, Important)

* a divide-by-zero flaw was found in azx_position_ok() in the Intel High Definition Audio driver, snd-hda-intel. A local, unprivileged user could trigger this flaw to cause a denial of service.
(CVE-2010-1085, Moderate)

* an information leak flaw was found in the kernel's USB implementation. Certain USB errors could result in an uninitialized kernel buffer being sent to user-space. An attacker with physical access to a target system could use this flaw to cause an information leak. (CVE-2010-1083, Low)

Red Hat would like to thank Ang Way Chuang for reporting CVE-2010-1086.

Bug fixes :

* a regression prevented the Broadcom BCM5761 network device from working when in the first (top) PCI-E slot of Hewlett-Packard (HP) Z600 systems. Note: The card worked in the 2nd or 3rd PCI-E slot.
(BZ#567205)

* the Xen hypervisor supports 168 GB of RAM for 32-bit guests. The physical address range was set incorrectly, however, causing 32-bit, para-virtualized Red Hat Enterprise Linux 4.8 guests to crash when launched on AMD64 or Intel 64 hosts that have more than 64 GB of RAM.
(BZ#574392)

* RHSA-2009:1024 introduced a regression, causing diskdump to fail on systems with certain adapters using the qla2xxx driver. (BZ#577234)

* a race condition caused TX to stop in a guest using the virtio_net driver. (BZ#580089)

* on some systems, using the 'arp_validate=3' bonding option caused both links to show as 'down' even though the arp_target was responding to ARP requests sent by the bonding driver. (BZ#580842)

* in some circumstances, when a Red Hat Enterprise Linux client connected to a re-booted Windows-based NFS server, server-side filehandle-to-inode mapping changes caused a kernel panic.
'bad_inode_ops' handling was changed to prevent this. Note:
filehandle-to-inode mapping changes may still cause errors, but not panics. (BZ#582908)

* when installing a Red Hat Enterprise Linux 4 guest via PXE, hard-coded fixed-size scatterlists could conflict with host requests, causing the guest's kernel to panic. With this update, dynamically allocated scatterlists are used, resolving this issue. (BZ#582911)

Enhancements :

* kernel support for connlimit. Note: iptables errata update RHBA-2010:0395 is also required for connlimit to work correctly.
(BZ#563223)

* support for the Intel architectural performance monitoring subsystem (arch_perfmon). On supported CPUs, arch_perfmon offers means to mark performance events and options for configuring and counting these events. (BZ#582913)

* kernel support for OProfile sampling of Intel microarchitecture (Nehalem) CPUs. This update alone does not address OProfile support for such CPUs. A future oprofile package update will allow OProfile to work on Intel Nehalem CPUs. (BZ#582241)

Users should upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements.
The system must be rebooted for this update to take effect.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
46307	RHEL 5 : kernel (RHSA-2010:0398)	Nessus	Red Hat Local Security Checks	2010/5/11	2021/1/14	high
46725	Debian DSA-2053-1 : linux-2.6 - privilege escalation/denial of service/information leak	Nessus	Debian Local Security Checks	2010/5/26	2021/1/4	high
46759	CentOS 5 : kernel (CESA-2010:0398)	Nessus	CentOS Local Security Checks	2010/6/1	2021/1/4	high
46810	Ubuntu 6.06 LTS / 8.04 LTS / 9.04 / 9.10 / 10.04 LTS : linux, linux-source-2.6.15 vulnerabilities (USN-947-1)	Nessus	Ubuntu Local Security Checks	2010/6/4	2019/9/19	high
59148	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 7015)	Nessus	SuSE Local Security Checks	2012/5/17	2021/1/14	high
68036	Oracle Linux 4 : kernel (ELSA-2010-0394)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2021/8/24	high

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