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CVE-2023-53847

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <373e0ab8c4c516561493f1acf367c7ee7dc053c2, <=6.1.*, 0, 6.1.46, <7a11d1e2625bdb2346f6586773b20b20977278ac, 6.5, <=5.10.*, <=4.14.*, <044f4446e06bb03c52216697b14867ebc555ad3b, <fe7c3a445d22783d27fe8bd0521a8aab1eb9da65, 2.6.16, <0d2d5282d39aed6f27dfe1ed60a5f3934ebd21cd, <=5.4.*, 5.15.127, <=4.19.*, 6.4.11, 5.4.254, <a6ff6e7a9dd69364547751db0f626a10a6d628d2, 4.19.292, e80b0fade09ef1ee67b0898d480d4c588f124d5f, <=*, <49d380bcd6cba987c6085fae6464c9c087e8d9a0, <=5.15.*, 4.14.323, <2.6.16, 5.10.191, <153c3e85873cc3e2f387169783c3a227bad9a95a, <=6.4.*

Description

In the Linux kernel, the following vulnerability has been resolved: usb-storage: alauda: Fix uninit-value in alauda_check_media() Syzbot got KMSAN to complain about access to an uninitialized value in the alauda subdriver of usb-storage: BUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 CPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460 The problem is that alauda_check_media() doesn't verify that its USB transfer succeeded before trying to use the received data. What should happen if the transfer fails isn't entirely clear, but a reasonably conservative approach is to pretend that no media is present. A similar problem exists in a usb_stor_dbg() call in alauda_get_media_status(). In this case, when an error occurs the call is redundant, because usb_stor_ctrl_transfer() already will print a debugging message. Finally, unrelated to the uninitialized memory access, is the fact that alauda_check_media() performs DMA to a buffer on the stack. Fortunately usb-storage provides a general purpose DMA-able buffer for uses like this. We'll use it instead.

Gravité et risque d'exploitation

CVE-2023-53847 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 0.24 %, ce qui la place devant 14.1 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <373e0ab8c4c516561493f1acf367c7ee7dc053c2, <=6.1.*, 0, 6.1.46, <7a11d1e2625bdb2346f6586773b20b20977278ac, 6.5, <=5.10.*, <=4.14.*, <044f4446e06bb03c52216697b14867ebc555ad3b, <fe7c3a445d22783d27fe8bd0521a8aab1eb9da65, 2.6.16, <0d2d5282d39aed6f27dfe1ed60a5f3934ebd21cd, <=5.4.*, 5.15.127, <=4.19.*, 6.4.11, 5.4.254, <a6ff6e7a9dd69364547751db0f626a10a6d628d2, 4.19.292, e80b0fade09ef1ee67b0898d480d4c588f124d5f, <=*, <49d380bcd6cba987c6085fae6464c9c087e8d9a0, <=5.15.*, 4.14.323, <2.6.16, 5.10.191, <153c3e85873cc3e2f387169783c3a227bad9a95a, <=6.4.*) 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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