Bug 2119782 (CVE-2022-37451)

Summary:	CVE-2022-37451 Exim: Exim before 4.96 has an invalid free in pam_converse
Product:	[Other] Security Response	Reporter:	Zack Miele <zmiele>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bennie.joubert, dwmw2, jskarvad
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Exim 4.96	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-09-02 08:25:50 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:	2119783, 2119784
Bug Blocks:	2119781

Description Zack Miele 2022-08-19 12:33:24 UTC

Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc.

https://www.exim.org/static/doc/security/
https://github.com/ivd38/exim_invalid_free
https://github.com/Exim/exim/compare/exim-4.95...exim-4.96
https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html
https://www.openwall.com/lists/oss-security/2022/08/06/1
https://github.com/Exim/exim/wiki/EximSecurity
https://cwe.mitre.org/data/definitions/762.html
https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42

Comment 1 Zack Miele 2022-08-19 12:35:02 UTC

Created exim tracking bugs for this issue:

Affects: epel-all [bug 2119783]
Affects: fedora-all [bug 2119784]

Comment 2 Product Security DevOps Team 2022-09-02 08:25:48 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.