Bug 1215715 (CVE-2023-5129)

Summary:	VUL-0: CVE-2023-5129: libwebp: With a specially crafted WebP lossless file, libwebp may write data out of bounds to the heap
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	E-mail List <gnome-bugs>
Status:	RESOLVED DUPLICATE	QA Contact:	Security Team bot <security-team>
Severity:	Critical
Priority:	P5 - None	CC:	cathy.hu
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/379829/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-5129:8.8:(AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2023-09-26 09:22:41 UTC

With a specially crafted WebP lossless file, libwebp may write data out of
bounds to the heap.

The ReadHuffmanCodes() function allocates the HuffmanCode buffer with a size
that comes from an array of precomputed sizes: kTableSize. The color_cache_bits
value defines which size to use.

The kTableSize array only takes into account sizes for 8-bit first-level table
lookups but not second-level table lookups. libwebp allows codes that are up to
15-bit (MAX_ALLOWED_CODE_LENGTH). When BuildHuffmanTable() attempts to fill the
second-level tables it may write data out-of-bounds. The OOB write to the
undersized array happens in ReplicateValue.



References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-5129
https://chromium.googlesource.com/webm/libwebp/+/2af26267cdfcb63a88e5c74a85927a12d6ca1d76
https://chromium.googlesource.com/webm/libwebp/+/902bc9190331343b2017211debcec8d2ab87e17a

Comment 1 Cathy Hu 2023-09-26 09:35:10 UTC

this is already tracked internally via bsc#1215231, marking as duplicate

*** This bug has been marked as a duplicate of bug 1215231 ***