Bug 1953004 (CVE-2020-23922)

Summary:	CVE-2020-23922 giflib: out-of-bounds read in DumpScreen2RGB() in gif2rgb.c in gif2rgb tool
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jaromir.capik, kaycoth, manisandro, nforro, vgaikwad
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in giflib. A missing check in function DumpScreen2RGB in gif2rgb.c leads to an out-of-bounds read, allowing an attacker to crash the gif2rgb tool. The issue is not in the giflib library, but in the gif2rgb utility program.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 12:23:28 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:	1955576
Bug Blocks:	1953005

Description Guilherme de Almeida Suckevicz 2021-04-23 17:42:26 UTC

An issue was discovered in giflib through 5.1.4. DumpScreen2RGB in gif2rgb.c has a heap-based buffer over-read.

Reference:
https://sourceforge.net/p/giflib/bugs/151/

Comment 1 Riccardo Schirone 2021-04-30 12:17:50 UTC

Statement:

This issue did not affect the versions of giflib as shipped with Red Hat Enterprise Linux 8 as they did not include the gif2rgb tool.