Bug 2237416 (CVE-2023-41909)

Summary:	CVE-2023-41909 frr: NULL pointer dereference in bgp_nlri_parse_flowspec() in bgpd/bgp_flowspec.c
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	frr 9.0	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in frr. Processing a malformed request with no attributes may cause a NULL pointer dereference, 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:	2238409
Bug Blocks:	2237417

Description Avinash Hanwate 2023-09-05 12:09:13 UTC

An issue was discovered in FRRouting FRR through 9.0. bgp_nlri_parse_flowspec in bgpd/bgp_flowspec.c processes malformed requests with no attributes, leading to a NULL pointer dereference.

Reference and upstream patch:
https://github.com/FRRouting/frr/pull/13222/commits/cfd04dcb3e689754a72507d086ba3b9709fc5ed8

Comment 2 Guilherme de Almeida Suckevicz 2023-09-11 17:43:09 UTC

Created frr tracking bugs for this issue:

Affects: fedora-all [bug 2238409]

Comment 3 errata-xmlrpc 2024-04-30 09:42:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2156 https://access.redhat.com/errata/RHSA-2024:2156

Comment 4 errata-xmlrpc 2024-05-22 09:26:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:2981 https://access.redhat.com/errata/RHSA-2024:2981