Bug 2155525 (CVE-2020-35511)

Summary:	CVE-2020-35511 pngcheck: global-buffer-overflow in pngcheck() in pngcheck.c
Product:	[Other] Security Response	Reporter:	TEJ RATHI <trathi>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	code
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	pngcheck 3.0.0	Doc Type:	If docs needed, set a value
Doc Text:	A global buffer overflow vulnerability was discovered in pngcheck in pngcheck() function of pngcheck.c file. An attacker could exploit the vulnerability via a crafted png file that triggers an out-of-bounds read, leading to a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2155526
Bug Blocks:

Description TEJ RATHI 2022-12-21 12:41:34 UTC

A global buffer overflow (out-of-bounds read) was discovered in pngcheck-2.4.0 and before in pngcheck() function in pngcheck.c via a crafted png file.

Fixed in pngcheck v3.0.0 (upstream).

https://bugzilla.redhat.com/show_bug.cgi?id=1905775 (original report)
http://www.libpng.org/pub/png/apps/pngcheck.html

Comment 1 TEJ RATHI 2022-12-21 12:41:52 UTC

Created pngcheck tracking bugs for this issue:

Affects: epel-all [bug 2155526]

Comment 2 Ben Beasley 2022-12-21 15:54:08 UTC

This patch was backported into pngcheck 2.4 in EPEL8/7 at the time.

https://bugzilla.redhat.com/show_bug.cgi?id=1905775#c13