CVE-2024-42232

CVE Details

Release Date:

2024-08-07

Description

In the Linux kernel, the following vulnerability has been resolved:\nlibceph: fix race between delayed_work() and ceph_monc_stop()\nThe way the delayed work is handled in ceph_monc_stop() is prone to\nraces with mon_fault() and possibly also finish_hunting(). Both of\nthese can requeue the delayed work which wouldn't be canceled by any of\nthe following code in case that happens after cancel_delayed_work_sync()\nruns -- __close_session() doesn't mess with the delayed work in order\nto avoid interfering with the hunting interval logic. This part was\nmissed in commit b5d91704f53e ('libceph: behave in mon_fault() if\ncur_mon < 0') and use-after-free can still ensue on monc and objects\nthat hang off of it, with monc->auth and monc->monmap being\nparticularly susceptible to quickly being reused.\nTo fix this:\n- clear monc->cur_mon and monc->hunting as part of closing the session\nin ceph_monc_stop()\n- bail from delayed_work() if monc->cur_mon is cleared, similar to how\nit's done in mon_fault() and finish_hunting() (based on monc->hunting)\n- call cancel_delayed_work_sync() after the session is closed

See more information about CVE-2024-42232 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12610	2024-09-10
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12779	2024-10-11
Oracle Linux version 7 (kernel-uek-container)	ELSA-2024-12612	2024-09-11
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12610	2024-09-10
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12618	2024-09-12
Oracle Linux version 8 (kernel-uek-container)	ELSA-2024-12612	2024-09-11
Oracle Linux version 9 (kernel-uek)	ELSA-2024-12618	2024-09-12