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CVE-2023-54006

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <2d8933ca863e252fb09ad0be483255e3dfeb1f54, <=6.1.*, 6.1.54, 9305cfa4443dbfb99faf35c5603ec0c0e91b5ef8, <e5edc6e44a882c0458878ab10eaddfe60ac34e57, <ade32bd8a738d7497ffe9743c46728db26740f78, <afc284a4a781defbb12b2a40427fae34c3d20e17, 0, <31b46d5e7c4e295bd112960614a66a177a057dca, 6.5.4, 4.19.295, <=5.10.*, <=4.14.*, 5.4.257, 2.6.24, <5d91b7891f4a9a9d69d75e9f44ab4bf1f3b11840, 6.6, <=5.4.*, <=4.19.*, <20aa8325464d8905450089eed96ca102a074d853, <cf29b42766ad4af2ae6a449f583796951551b48d, 5.15.132, 5.10.195, <=*, <=5.15.*, <=6.5.*, 4.14.326, <2.6.24

Description

In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix data-race around unix_tot_inflight. unix_tot_inflight is changed under spin_lock(unix_gc_lock), but unix_release_sock() reads it locklessly. Let's use READ_ONCE() for unix_tot_inflight. Note that the writer side was marked by commit 9d6d7f1cb67c ("af_unix: annote lockless accesses to unix_tot_inflight & gc_in_progress") BUG: KCSAN: data-race in unix_inflight / unix_release_sock write (marked) to 0xffffffff871852b8 of 4 bytes by task 123 on cpu 1: unix_inflight+0x130/0x180 net/unix/scm.c:64 unix_attach_fds+0x137/0x1b0 net/unix/scm.c:123 unix_scm_to_skb net/unix/af_unix.c:1832 [inline] unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1955 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0x148/0x160 net/socket.c:747 ____sys_sendmsg+0x4e4/0x610 net/socket.c:2493 ___sys_sendmsg+0xc6/0x140 net/socket.c:2547 __sys_sendmsg+0x94/0x140 net/socket.c:2576 __do_sys_sendmsg net/socket.c:2585 [inline] __se_sys_sendmsg net/socket.c:2583 [inline] __x64_sys_sendmsg+0x45/0x50 net/socket.c:2583 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x72/0xdc read to 0xffffffff871852b8 of 4 bytes by task 4891 on cpu 0: unix_release_sock+0x608/0x910 net/unix/af_unix.c:671 unix_release+0x59/0x80 net/unix/af_unix.c:1058 __sock_release+0x7d/0x170 net/socket.c:653 sock_close+0x19/0x30 net/socket.c:1385 __fput+0x179/0x5e0 fs/file_table.c:321 ____fput+0x15/0x20 fs/file_table.c:349 task_work_run+0x116/0x1a0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x174/0x180 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:297 do_syscall_64+0x4b/0x90 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x72/0xdc value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 4891 Comm: systemd-coredum Not tainted 6.4.0-rc5-01219-gfa0e21fa4443 #5 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014

Gravité et risque d'exploitation

CVE-2023-54006 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 0.22 %, ce qui la place devant 11.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <2d8933ca863e252fb09ad0be483255e3dfeb1f54, <=6.1.*, 6.1.54, 9305cfa4443dbfb99faf35c5603ec0c0e91b5ef8, <e5edc6e44a882c0458878ab10eaddfe60ac34e57, <ade32bd8a738d7497ffe9743c46728db26740f78, <afc284a4a781defbb12b2a40427fae34c3d20e17, 0, <31b46d5e7c4e295bd112960614a66a177a057dca, 6.5.4, 4.19.295, <=5.10.*, <=4.14.*, 5.4.257, 2.6.24, <5d91b7891f4a9a9d69d75e9f44ab4bf1f3b11840, 6.6, <=5.4.*, <=4.19.*, <20aa8325464d8905450089eed96ca102a074d853, <cf29b42766ad4af2ae6a449f583796951551b48d, 5.15.132, 5.10.195, <=*, <=5.15.*, <=6.5.*, 4.14.326, <2.6.24) 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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