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CVE-2023-54177

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, 3.12.24, 5.15.123, <3.15, <3.13, 0, 4.14.324, 6.5, <=5.10.*, <=4.14.*, <cbaebbba722cb9738c55903efce11f51cdd97bee, <3f378783c47b5749317ea008d8c931d6d3986d8f, <6432843debe1ec7d76c5b2f76c67f9c5df22436e, 3.15, <=5.4.*, 5.10.192, b5258061a2a8f657aa5900dd3c1ded9e868e3544, <=4.19.*, 5.4.255, 4.19.293, 6.1.42, 9f985cb6c45bc3f8b7e161c9658d409d051d576f, <d6a95db3c7ad160bc16b89e36449705309b52bcb, <=*, <=5.15.*, <965bad2bf1afef64ec16249da676dc7310cca32e, <6478eabc92274efae6269da7c515ba2b4c8e88d8, <579d814de87c3cac69c9b261efa165d07cde3357, 6.4.7, <=6.4.*, <6f4e543d277a12dfeff027e6ab24a170e1bfc160

Description

In the Linux kernel, the following vulnerability has been resolved: quota: fix warning in dqgrab() There's issue as follows when do fault injection: WARNING: CPU: 1 PID: 14870 at include/linux/quotaops.h:51 dquot_disable+0x13b7/0x18c0 Modules linked in: CPU: 1 PID: 14870 Comm: fsconfig Not tainted 6.3.0-next-20230505-00006-g5107a9c821af-dirty #541 RIP: 0010:dquot_disable+0x13b7/0x18c0 RSP: 0018:ffffc9000acc79e0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88825e41b980 RDX: 0000000000000000 RSI: ffff88825e41b980 RDI: 0000000000000002 RBP: ffff888179f68000 R08: ffffffff82087ca7 R09: 0000000000000000 R10: 0000000000000001 R11: ffffed102f3ed026 R12: ffff888179f68130 R13: ffff888179f68110 R14: dffffc0000000000 R15: ffff888179f68118 FS: 00007f450a073740(0000) GS:ffff88882fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe96f2efd8 CR3: 000000025c8ad000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> dquot_load_quota_sb+0xd53/0x1060 dquot_resume+0x172/0x230 ext4_reconfigure+0x1dc6/0x27b0 reconfigure_super+0x515/0xa90 __x64_sys_fsconfig+0xb19/0xd20 do_syscall_64+0x39/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Above issue may happens as follows: ProcessA ProcessB ProcessC sys_fsconfig vfs_fsconfig_locked reconfigure_super ext4_remount dquot_suspend -> suspend all type quota sys_fsconfig vfs_fsconfig_locked reconfigure_super ext4_remount dquot_resume ret = dquot_load_quota_sb add_dquot_ref do_open -> open file O_RDWR vfs_open do_dentry_open get_write_access atomic_inc_unless_negative(&inode->i_writecount) ext4_file_open dquot_file_open dquot_initialize __dquot_initialize dqget atomic_inc(&dquot->dq_count); __dquot_initialize __dquot_initialize dqget if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) ext4_acquire_dquot -> Return error DQ_ACTIVE_B flag isn't set dquot_disable invalidate_dquots if (atomic_read(&dquot->dq_count)) dqgrab WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) -> Trigger warning In the above scenario, 'dquot->dq_flags' has no DQ_ACTIVE_B is normal when dqgrab(). To solve above issue just replace the dqgrab() use in invalidate_dquots() with atomic_inc(&dquot->dq_count).

Gravité et risque d'exploitation

CVE-2023-54177 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 0.23 %, ce qui la place devant 12.6 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, 3.12.24, 5.15.123, <3.15, <3.13, 0, 4.14.324, 6.5, <=5.10.*, <=4.14.*, <cbaebbba722cb9738c55903efce11f51cdd97bee, <3f378783c47b5749317ea008d8c931d6d3986d8f, <6432843debe1ec7d76c5b2f76c67f9c5df22436e, 3.15, <=5.4.*, 5.10.192, b5258061a2a8f657aa5900dd3c1ded9e868e3544, <=4.19.*, 5.4.255, 4.19.293, 6.1.42, 9f985cb6c45bc3f8b7e161c9658d409d051d576f, <d6a95db3c7ad160bc16b89e36449705309b52bcb, <=*, <=5.15.*, <965bad2bf1afef64ec16249da676dc7310cca32e, <6478eabc92274efae6269da7c515ba2b4c8e88d8, <579d814de87c3cac69c9b261efa165d07cde3357, 6.4.7, <=6.4.*, <6f4e543d277a12dfeff027e6ab24a170e1bfc160) 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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