Bug 1993070 (CVE-2021-20314)

Summary:	CVE-2021-20314 libspf2: stack buffer overflow when processing SPF explanation macros
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	tkorbar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A stack buffer overflow was found in libspf2 when processing certain SPF macros. This issue can lead to a denial of service and potentially code execution via malicious crafted SPF explanation messages. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-08-12 13:28:16 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:	1993071, 1993072
Bug Blocks:	1994465

Description Dhananjay Arunesh 2021-08-12 10:29:49 UTC

Stack buffer overflow in libspf2 versions below 1.2.11 when processing certain SPF macros can lead to Denial of service and potentially code execution via malicious crafted SPF explanation messages. CVE-2021-20314 has been assigned to this issue.

References:
https://seclists.org/oss-sec/2021/q3/94
https://github.com/shevek/libspf2/commit/c37b7c13c30e225183899364b9f2efdfa85552ef

Comment 1 Dhananjay Arunesh 2021-08-12 10:30:15 UTC

Created libspf2 tracking bugs for this issue:

Affects: epel-all [bug 1993072]
Affects: fedora-all [bug 1993071]

Comment 2 Product Security DevOps Team 2021-08-12 13:28:16 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.