Bug 2027172 (CVE-2021-44143)

Summary:	CVE-2021-44143 isync: specially crafted mail message may cause heap overflow
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	lkundrak, mail
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:	2021-11-29 04:38:48 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:	2027173, 2027174
Bug Blocks:

Description Marian Rehak 2021-11-29 04:08:19 UTC

A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.

Reference:

https://sourceforge.net/p/isync/isync/commit_browser
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999804
https://sourceforge.net/p/isync/isync/ref/master/tags/

Comment 1 Marian Rehak 2021-11-29 04:08:34 UTC

Created isync tracking bugs for this issue:

Affects: epel-all [bug 2027174]
Affects: fedora-all [bug 2027173]

Comment 2 Product Security DevOps Team 2021-11-29 04:38:46 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.