Bug 2116564 (CVE-2022-37452)

Summary:	CVE-2022-37452 Exim: heap-based buffer overflow in host_name_lookup in host.c.
Product:	[Other] Security Response	Reporter:	Zack Miele <zmiele>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	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
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Zack Miele 2022-08-08 21:04:14 UTC

Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set.

https://www.exim.org/static/doc/security/
https://github.com/ivd38/exim_overflow
https://www.openwall.com/lists/oss-security/2022/08/06/8
https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743
https://github.com/Exim/exim/wiki/EximSecurity
https://github.com/Exim/exim/compare/exim-4.94...exim-4.95