Bug 1769540 (CVE-2019-17534)

Summary:	CVE-2019-17534 vips: use-after-free in vips_foreign_load_gif_scan_image in foreign/gifload.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	adam, bgilbert, redhat
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-08 04:32:45 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1769541, 1769542
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2019-11-06 20:11:40 UTC

vips_foreign_load_gif_scan_image in foreign/gifload.c in libvips before 8.8.2 tries to access a color map before a DGifGetImageDesc call, leading to a use-after-free.

References:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16796
https://github.com/libvips/libvips/commit/ce684dd008532ea0bf9d4a1d89bacb35f4a83f4d

Comment 1 Guilherme de Almeida Suckevicz 2019-11-06 20:11:55 UTC

Created vips tracking bugs for this issue:

Affects: fedora-29 [bug 1769541]
Affects: fedora-30 [bug 1769542]

Comment 2 Benjamin Gilbert 2019-12-06 06:18:37 UTC

F29 is EOL, F30 is unaffected, and F31/rawhide are patched.

Comment 3 Kleis Auke Wolthuizen 2020-04-25 19:35:23 UTC

For further readers; the data in NVD is incorrect. This vulnerability was only present on the libvips master branch for about 24 hours and was never included in a released version.

Please see:
https://github.com/libvips/libvips/commit/ce684dd008532ea0bf9d4a1d89bacb35f4a83f4d#commitcomment-36619649
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16796#c4