CentOS 9: kernel-5.14.0-542.el9
high Nessus 插件 ID 213059
语言：
简介
远程 CentOS 主机缺少一个或多个 bpftool 安全更新。描述
远程 CentOS Linux 9 主机上安装的多个程序包受到 kernel-5.14.0-542.el9 版本变更日志中提及的多个漏洞影响。- Linux 内核中的以下漏洞已得到修复：nfsd：使用 nfs4_state_shutdown_net 中的同步模式取消 nfsd_shrinker_work 。一般情况下，当我们执行 `echo 0 > /proc/fs/nfsd/threads` 时， `nfs4_state_shutdown_net` 中的 `nfs4_state_destroy_net` 函数将释放与哈希 `nfs4_client` 相关的所有资源。如果 “nfsd_client_shrinker” 处于并发运行，“expire_client” 函数将首先反哈希此客户端并将其破坏。由此可能出现以下警告。
此外，也可能会发生大量释放后使用的错误。 nfsd_client_shrinker echo 0 > /proc/fs/nfsd/threads expire_client nfsd_shutdown_net unhash_client ... nfs4_state_shutdown_net /* won't wait shrinker exit */ /* cancel_work(&nn->nfsd_shrinker_work) * nfsd_file for this /* won't destroy unhashed client1 */ * client1 still alive nfs4_state_destroy_net */ nfsd_file_cache_shutdown /* trigger warning */ kmem_cache_destroy(nfsd_file_slab) kmem_cache_destroy(nfsd_file_mark_slab) /* release nfsd_file and mark */ __destroy_client ==================================================================== BUG nfsd_file (Not tainted): Objects remaining in nfsd_file on __kmem_cache_shutdown()
-------------------------------------------------------------------- CPU: 4 UID: 0 PID: 764 Comm: sh Not tainted 6.12.0-rc3+ #1 dump_stack_lvl+0x53/0x70 slab_err+0xb0/0xf0 __kmem_cache_shutdown+0x15c/0x310 kmem_cache_destroy+0x66/0x160 nfsd_file_cache_shutdown+0xac/0x210 [nfsd] nfsd_destroy_serv+0x251/0x2a0 [nfsd] nfsd_svc+0x125/0x1e0 [nfsd] write_threads+0x16a/0x2a0 [nfsd] nfsctl_transaction_write+0x74/0xa0 [nfsd] vfs_write+0x1a5/0x6d0 ksys_write+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e ==================================================================== BUG nfsd_file_mark (Tainted: G B W ):
Objects remaining nfsd_file_mark on __kmem_cache_shutdown()
-------------------------------------------------------------------- dump_stack_lvl+0x53/0x70 slab_err+0xb0/0xf0 __kmem_cache_shutdown+0x15c/0x310 kmem_cache_destroy+0x66/0x160 nfsd_file_cache_shutdown+0xc8/0x210 [nfsd] nfsd_destroy_serv+0x251/0x2a0 [nfsd] nfsd_svc+0x125/0x1e0 [nfsd] write_threads+0x16a/0x2a0 [nfsd] nfsctl_transaction_write+0x74/0xa0 [nfsd] vfs_write+0x1a5/0x6d0 ksys_write+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e To resolve this issue, cancel `nfsd_shrinker_work` using synchronous mode in nfs4_state_shutdown_net. (CVE-2024-50121)
- Linux 内核中的以下漏洞已得到修复：fscache：修复因 cookie_lru 和 use_cookie 的争用而导致的错误。如果 LRU 的 cookie 过期并且设置了 LRU_DISCARD 标记，但是状态机尚未运行，可能是因为另一个线程可调用 fscache_use_cookie 并开始使用的原因。
当 cookie_worker 最终运行时，其会发现 LRU_DISCARD 标记已设置，并将 cookie->state 转换为 LRU_DISCARDING，然后 LRU_DISCARDING 会撤回 cookie。在 cookie 撤回后，对象会被移除，并因为与 cookie 关联的对象现在为 NULL 而出现且以下错误。如果另一线程在 cookie_worker 运行之前使用 cookie，则通过清除 LRU_DISCARD 位来修复错误。BUG: kernel NULL pointer dereference, address: 0000000000000008 ... CPU: 31 PID: 44773 Comm: kworker/u130:1 Tainted: G E 6.0.0-5.dneg.x86_64 #1 Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Workqueue: events_unbound netfs_rreq_write_to_cache_work [netfs] RIP:
0010:cachefiles_prepare_write+0x28/0x90 [cachefiles] ... 调用跟踪：
netfs_rreq_write_to_cache_work+0x11c/0x320 [netfs] process_one_work+0x217/0x3e0 worker_thread+0x4a/0x3b0 kthread+0xd6/0x100 (CVE-2022-48989)
- Linux 内核中的以下漏洞已得到修复：scsi: aacraid：修复探测失败时的双重释放 aac_probe_one() 通过 aac_driver_ident::init 指针调用硬件特定的 init 函数，所有这些函数最终会调用 aac_init_adapter( ）。如果 aac_init_adapter() 在为 aac_dev::queues 分配内存之后失败，内存会被释放，但不会清除该成员。在硬件特定的 init 函数返回错误后，aac_probe_one() 进入错误路径，释放 aac_dev::queues 指向的内存，导致双重释放。 (CVE-2024-46673)
- Linux 内核中的以下漏洞已得到修复：cachefiles：修复 cachefiles_open_file() 中的 dentry 泄漏并发查找 cookie 和挑选时可能导致 dentry 泄漏：P1 | P2
----------------------------------------------------------- cachefiles_lookup_cookie cachefiles_look_up_object lookup_one_positive_unlocked // get dentry cachefiles_cull inode->i_flags |= S_KERNEL_FILE; cachefiles_open_file cachefiles_mark_inode_in_use __cachefiles_mark_inode_in_use can_use = false if (!(inode->i_flags & S_KERNEL_FILE)) can_use = true return false return false // 返回错误，但不会放置 dentry 之后，当卸载后端文件夹时，将触发以下警告： ================================================================== BUG: Dentry 000000008ad87947{i=7a,n=Dx_1_1.img} still in use (1) [unmount of ext4 sda] WARNING: CPU: 4 PID: 359261 at fs/dcache.c:1767 umount_check+0x5d/0x70 CPU: 4 PID: 359261 Comm: umount Not tainted 6.6.0-dirty #25 RIP:
0010:umount_check+0x5d/0x70 Call Trace: <TASK> d_walk+0xda/0x2b0 do_one_tree+0x20/0x40 shrink_dcache_for_umount+0x2c/0x90 generic_shutdown_super+0x20/0x160 kill_block_super+0x1a/0x40 ext4_kill_sb+0x22/0x40 deactivate_locked_super+0x35/0x80 cleanup_mnt+0x104 /0x160 ================================================ ================== 无论 cachefiles_open_file() 返回 true 或 false，都应释放 cachefiles_look_up_object() 中 lookup_positive_unlocked() 获取的引用计数。因此，释放 cachefiles_look_up_object() 中的引用计数以修复上述问题并简化代码。 (CVE-2024-49870)
- Linux 内核中的以下漏洞已得到修复：uprobes：修复通过 [uprobes] vma xol_add_vma() 将 __create_xol_area() 分配到用户空间的未初始化页面映射到用户空间的内核信息泄漏。
在某些架构 (x86) 上，即使没有 VM_READ，此内存也可读取，VM_EXEC 会导致与 VM_EXEC|VM_READ 相同的 pgprot_t，尽管该影响不大，调试程序仍可读取此内存。
(CVE-2024-49975)
请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。
解决方案
更新 CentOS 9 Stream bpftool 程序包。另见
https://kojihub.stream.centos.org/koji/buildinfo?buildID=72708
插件详情
严重性: High
ID: 213059
文件名: centos9_kernel-5_14_0-542_72708.nasl
版本: 1.1
类型: local
代理: unix
发布时间: 2024/12/16
最近更新时间: 2024/12/16
支持的传感器: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
风险信息
VPR
风险因素: Medium
分数: 6.7
CVSS v2
风险因素: Medium
基本分数: 6.8
时间分数: 5
矢量: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS 分数来源: CVE-2024-50121
CVSS v3
风险因素: High
基本分数: 7.8
时间分数: 6.8
矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
时间矢量: CVSS:3.0/E:U/RL:O/RC:C
漏洞信息
CPE: p-cpe:/a:centos:centos:kernel-rt-devel-matched, p-cpe:/a:centos:centos:kernel-rt-modules-core, p-cpe:/a:centos:centos:kernel-debug-devel, p-cpe:/a:centos:centos:kernel-devel, p-cpe:/a:centos:centos:kernel-64k-debug, p-cpe:/a:centos:centos:libperf, p-cpe:/a:centos:centos:kernel-rt-core, p-cpe:/a:centos:centos:kernel-modules-partner, p-cpe:/a:centos:centos:kernel-64k-modules-extra, p-cpe:/a:centos:centos:kernel-64k-modules-core, p-cpe:/a:centos:centos:kernel-64k-modules-partner, p-cpe:/a:centos:centos:kernel-64k-modules, p-cpe:/a:centos:centos:kernel-rt-devel, p-cpe:/a:centos:centos:kernel-debug-uki-virt-addons, p-cpe:/a:centos:centos:kernel-rt-modules-extra, p-cpe:/a:centos:centos:python3-perf, p-cpe:/a:centos:centos:kernel-64k-debug-modules-partner, p-cpe:/a:centos:centos:kernel-zfcpdump, p-cpe:/a:centos:centos:kernel-64k-debug-core, p-cpe:/a:centos:centos:kernel-64k-debug-modules-internal, p-cpe:/a:centos:centos:kernel-zfcpdump-modules-partner, p-cpe:/a:centos:centos:kernel-zfcpdump-devel-matched, p-cpe:/a:centos:centos:kernel-debug-devel-matched, p-cpe:/a:centos:centos:kernel-64k-devel, p-cpe:/a:centos:centos:kernel-headers, p-cpe:/a:centos:centos:kernel-rt-modules, p-cpe:/a:centos:centos:kernel-64k-debug-devel-matched, p-cpe:/a:centos:centos:kernel-debug-core, p-cpe:/a:centos:centos:kernel-tools-libs-devel, p-cpe:/a:centos:centos:kernel-64k-core, p-cpe:/a:centos:centos:kernel-debug-modules-internal, p-cpe:/a:centos:centos:kernel-zfcpdump-modules-core, p-cpe:/a:centos:centos:kernel-rt-debug-modules-core, p-cpe:/a:centos:centos:kernel-modules-extra, p-cpe:/a:centos:centos:kernel-cross-headers, p-cpe:/a:centos:centos:kernel-rt-kvm, p-cpe:/a:centos:centos:kernel-rt-debug-modules-partner, p-cpe:/a:centos:centos:kernel-rt, p-cpe:/a:centos:centos:kernel-rt-modules-internal, p-cpe:/a:centos:centos:kernel-tools, p-cpe:/a:centos:centos:kernel-rt-debug-modules-extra, p-cpe:/a:centos:centos:kernel-debug-uki-virt, p-cpe:/a:centos:centos:kernel-rt-modules-partner, p-cpe:/a:centos:centos:kernel-rt-debug, p-cpe:/a:centos:centos:kernel-abi-stablelists, p-cpe:/a:centos:centos:kernel-rt-debug-devel-matched, p-cpe:/a:centos:centos:kernel-zfcpdump-core, p-cpe:/a:centos:centos:kernel-64k-debug-modules-extra, p-cpe:/a:centos:centos:kernel-zfcpdump-devel, p-cpe:/a:centos:centos:kernel-tools-libs, p-cpe:/a:centos:centos:libperf-devel, p-cpe:/a:centos:centos:kernel-64k, p-cpe:/a:centos:centos:kernel-64k-modules-internal, p-cpe:/a:centos:centos:kernel-ipaclones-internal, p-cpe:/a:centos:centos:kernel-debug, p-cpe:/a:centos:centos:rtla, cpe:/a:centos:centos:9, p-cpe:/a:centos:centos:kernel-64k-debug-modules, p-cpe:/a:centos:centos:kernel-zfcpdump-modules-extra, p-cpe:/a:centos:centos:kernel-selftests-internal, p-cpe:/a:centos:centos:kernel-modules-internal, p-cpe:/a:centos:centos:kernel-debug-modules, p-cpe:/a:centos:centos:rv, p-cpe:/a:centos:centos:kernel-zfcpdump-modules, p-cpe:/a:centos:centos:kernel-64k-debug-devel, p-cpe:/a:centos:centos:perf, p-cpe:/a:centos:centos:kernel-rt-debug-kvm, p-cpe:/a:centos:centos:kernel-modules, p-cpe:/a:centos:centos:kernel-zfcpdump-modules-internal, p-cpe:/a:centos:centos:bpftool, p-cpe:/a:centos:centos:kernel-rt-debug-modules-internal, p-cpe:/a:centos:centos:kernel-64k-devel-matched, p-cpe:/a:centos:centos:kernel-64k-debug-modules-core, p-cpe:/a:centos:centos:kernel-rt-debug-devel, p-cpe:/a:centos:centos:kernel-modules-core, p-cpe:/a:centos:centos:kernel-core, p-cpe:/a:centos:centos:kernel-debug-modules-partner, p-cpe:/a:centos:centos:kernel-debug-modules-extra, p-cpe:/a:centos:centos:kernel-rt-debug-core, p-cpe:/a:centos:centos:kernel-devel-matched, p-cpe:/a:centos:centos:kernel-rt-debug-modules, p-cpe:/a:centos:centos:kernel, p-cpe:/a:centos:centos:kernel-debug-modules-core, p-cpe:/a:centos:centos:kernel-uki-virt-addons, p-cpe:/a:centos:centos:kernel-uki-virt
必需的 KB 项: Host/local_checks_enabled, Host/cpu, Host/CentOS/release, Host/CentOS/rpm-list
易利用性: No known exploits are available
补丁发布日期: 2024/12/11
漏洞发布日期: 2024/9/13
参考资料信息
CVE: CVE-2022-48989, CVE-2024-46673, CVE-2024-49870, CVE-2024-49975, CVE-2024-50046, CVE-2024-50106, CVE-2024-50109, CVE-2024-50121, CVE-2024-50256