Bug 1220139 (CVE-2023-52436)

Summary:	VUL-0: CVE-2023-52436: kernel: explicitly null-terminate the xattr list
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED UPSTREAM	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	ailiopoulos, gabriele.sonnu, meissner
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/394647/
Whiteboard:
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-02-21 09:18:48 UTC

In the Linux kernel, the following vulnerability has been resolved:

f2fs: explicitly null-terminate the xattr list

When setting an xattr, explicitly null-terminate the xattr list.  This
eliminates the fragile assumption that the unused xattr space is always
zeroed.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52436
https://www.cve.org/CVERecord?id=CVE-2023-52436
https://git.kernel.org/stable/c/12cf91e23b126718a96b914f949f2cdfeadc7b2a
https://git.kernel.org/stable/c/16ae3132ff7746894894927c1892493693b89135
https://git.kernel.org/stable/c/2525d1ba225b5c167162fa344013c408e8b4de36
https://git.kernel.org/stable/c/32a6cfc67675ee96fe107aeed5af9776fec63f11
https://git.kernel.org/stable/c/3e47740091b05ac8d7836a33afd8646b6863ca52
https://git.kernel.org/stable/c/5de9e9dd1828db9b8b962f7ca42548bd596deb8a
https://git.kernel.org/stable/c/e26b6d39270f5eab0087453d9b544189a38c8564
https://git.kernel.org/stable/c/f6c30bfe5a49bc38cae985083a11016800708fea

Comment 1 Anthony Iliopoulos 2024-02-21 09:47:46 UTC

We don't support f2fs at all (we don't even compile it in any of our kernel branches).

We had briefly discussed this before in bsc#1211742.

My suggestion would still be to leverage our kernel-source blacklist.conf which is the authoritative source, and filter out what we don't support from the CVE reports.

Comment 2 Gabriele Sonnu 2024-02-21 10:04:59 UTC

As Anthony said, we don't support f2fs. Closing.

Comment 3 Gabriele Sonnu 2024-02-22 09:01:57 UTC

Closing now.