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CVE-2024-49903

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.3%
Linux•Linux•Versions : 6.12, <=6.1.*, <=6.11.*, <95accb7183badca387f7a8d19a2475cf3089f148, 5.4.285, <e7ae14f7ee76c6ef5a48aebab1a278ad78f42619, 0, <d6c1b3599b2feb5c7291f5ac3a36e5fa7cedb234, <=5.10.*, <=6.6.*, <fd026b6b6758d5569705c02540b40f3bbf822b9a, 6.6.55, 6.11.3, <=5.4.*, <=4.19.*, <4ac58f7734937f3249da734ede946dfb3b1af5e4, 6.1.113, 4.19.323, <4218b31ecc7af7e191768d32e32ed4386d8f9b76, <3.7, <3126ccde51f51b0648c8cdccaf916e8bd062e972, b40c2e665cd552eae5fbdbb878bc29a34357668e, <=*, 3.7, <=5.15.*, <a9603a6f75df2fd8125cd208c98cfaa0fe3f7505, 5.10.227, 6.10.14, 5.15.168, <=6.10.*, <0c238da83f56bb895cab1e5851d034ac45b158d1

Description

In the Linux kernel, the following vulnerability has been resolved: jfs: Fix uaf in dbFreeBits [syzbot reported] ================================================================== BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:587 [inline] BUG: KASAN: slab-use-after-free in __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752 Read of size 8 at addr ffff8880229254b0 by task syz-executor357/5216 CPU: 0 UID: 0 PID: 5216 Comm: syz-executor357 Not tainted 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: <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 [inline] 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+0x2d0/0x3e0 fs/jfs/ioctl.c:131 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __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 Freed by task 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 poison_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 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x149/0x360 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 [inline] vfs_fsconfig_locked fs/fsopen.c:292 [inline] __do_sys_fsconfig fs/fsopen.c:473 [inline] __se_sys_fsconfig+0xb6e/0xf80 fs/fsopen.c:345 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f [Analysis] There are two paths (dbUnmount and jfs_ioc_trim) that generate race condition when accessing bmap, which leads to the occurrence of uaf. Use the lock s_umount to synchronize them, in order to avoid uaf caused by race condition.

Gravité et risque d'exploitation

CVE-2024-49903 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.26 %, ce qui la place devant 16.0 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 6.12, <=6.1.*, <=6.11.*, <95accb7183badca387f7a8d19a2475cf3089f148, 5.4.285, <e7ae14f7ee76c6ef5a48aebab1a278ad78f42619, 0, <d6c1b3599b2feb5c7291f5ac3a36e5fa7cedb234, <=5.10.*, <=6.6.*, <fd026b6b6758d5569705c02540b40f3bbf822b9a, 6.6.55, 6.11.3, <=5.4.*, <=4.19.*, <4ac58f7734937f3249da734ede946dfb3b1af5e4, 6.1.113, 4.19.323, <4218b31ecc7af7e191768d32e32ed4386d8f9b76, <3.7, <3126ccde51f51b0648c8cdccaf916e8bd062e972, b40c2e665cd552eae5fbdbb878bc29a34357668e, <=*, 3.7, <=5.15.*, <a9603a6f75df2fd8125cd208c98cfaa0fe3f7505, 5.10.227, 6.10.14, 5.15.168, <=6.10.*, <0c238da83f56bb895cab1e5851d034ac45b158d1) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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