Bug 2184468 (CVE-2022-36440)

Summary:	CVE-2022-36440 frr: Reachable assertion in peek_for_as4_capability function
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	mruprich
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 reachable assertion flaw was found in Frrouting frr-bgpd in the peek_for_as4_capability function. This flaw allows an attacker to maliciously construct BGP open packets and send them to BGP peers running frr-bgpd, resulting in a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2184469, 2184869, 2184870
Bug Blocks:	2184470

Description Pedro Sampaio 2023-04-04 19:18:51 UTC

A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek_for_as4_capability function. Attackers can maliciously construct BGP open packets and send them to BGP peers running frr-bgpd, resulting in DoS.

https://github.com/spwpun/pocs/blob/main/frr-bgpd.md
https://github.com/spwpun/pocs
https://github.com/FRRouting/frr/issues/13202

Comment 1 Pedro Sampaio 2023-04-04 19:19:05 UTC

Created frr tracking bugs for this issue:

Affects: fedora-all [bug 2184469]

Comment 4 errata-xmlrpc 2023-11-07 08:16:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6434 https://access.redhat.com/errata/RHSA-2023:6434