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。

  - jfs修复 dbFreeBits 中的 uaf [syzbot 报告了] ======================================= =========================== 缺陷KASAN中的 slab 释放后使用
    __mutex_lock_common kernel/locking/mutex.c:587 [内联] 缺陷KASAN中的 slab 释放后使用
    __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752 在 addr ffff8880229254b0 处大小为 8 的读取由任务 syz-executor357/5216 CPU0: 0 UID: 0 PID: 5216 Comm: syz-executor357 未受感染 6.11.0-rc3- syzkaller-00156-gd7a5aa4b3c00 #0 硬件名称Google Google Compute Engine/Google Compute EngineBIOS Google 06/27/2024 调用跟踪 <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack .c:119 print_address_description mm/kasan/report.c:377 [内联] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601
    __mutex_lock_common kernel/locking/mutex.c:587 [inline] __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752 dbFreeBits+0x7ea/0xd90 fs/jfs/jfs_dmap.c:2390 dbFreeDmap fs/jfs/jfs_dmap.c 2089 [inline] dbFree+0x35b/0x680 fs/jfs/jfs_dmap.c:409 dbDiscardAG+0x8a9/0xa20 fs/jfs/jfs_dmap.c:1650 jfs_ioc_trim+0x433/0x670 fs/jfs/jfs_discard.c:100 jfs_ioctl/ 0x3e0 fs/jfs/ioctl.c:131 vfs_ioctl fs/ioctl.c:51 [内联] __do_sys_ioctl fs/ioctl.c:907 [内联] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry /common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 由任务释放 5218: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/ kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579毒害_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [内联] slab_free_hook mm/slub.c:2252 [内联] slab_free mm/slub.c:4473 [内联] kfree+0x149/0x 360 mm/slub.c:4594 dbUnmount+0x11d/0x190 fs/jfs/jfs_dmap.c:278 jfs_mount_rw+0x4ac/0x6a0 fs/jfs/jfs_mount.c:247 jfs_remount+0x3d1/0x6b0 fs/jfs/super.c:454 reconfigure_super+0x445/0x880 fs/super.c:1083 vfs_cmd_reconfigure fs/fsopen.c:263 [内联] vfs_fsconfig_locked fs/fsopen.c:292 [内联] __do_sys_fsconfig fs/fsopen.c:473 [内联]
    __se_sys_fsconfig+0xb6e/0xf80 fs/fsopen.c:345 do_syscall_x64 arch/x86/entry/common.c:52 [内联] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f [Analysis ] 有两个路径 (dbUnmount 和 jfs_ioc_trim)在访问 bmap 时生成争用条件从而导致 uaf 的发生。使用锁 s_umount 对其进行同步以避免争用条件造成的 uaf。 (CVE-2024-49903)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

检测

Linux Distros 未修补的漏洞：CVE-2024-49903

high Nessus 插件 ID 231818

版本 1.14