Bug 2126075 (CVE-2021-40648)

Summary:	CVE-2021-40648 sys-apps/man2html: multiple vulnerabilities
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	epel-packagers-sig, orion, sergio, tchollingsworth, viktor.vix.jancik
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:	2022-11-26 13:25:33 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:	2126815, 2126816
Bug Blocks:

Description ybuenos 2022-09-12 11:04:48 UTC

CVE-2021-40648:

In man2html 1.6g, a filename can be created to overwrite the previous size parameter of the next chunk and the fd, bk, fd_nextsize, bk_nextsize of the current chunk. The next chunk is then freed later on, causing a freeing of an arbitrary amount of memory.

https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933

Comment 1 ybuenos 2022-09-14 13:33:15 UTC

Created man2html tracking bugs for this issue:

Affects: epel-all [bug 2126815]
Affects: fedora-all [bug 2126816]

Comment 2 Product Security DevOps Team 2022-11-26 13:25:31 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.