CVE-2024-31951

Publication date 7 April 2024

Last updated 30 May 2025

Ubuntu priority

Cvss 3 Severity Score

In the Opaque LSA Extended Link parser in FRRouting (FRR) through 9.1, there can be a buffer overflow and daemon crash in ospf_te_parse_ext_link for OSPF LSA packets during an attempt to read Segment Routing Adjacency SID subTLVs (lengths are not validated).

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
frr	24.04 LTS noble	Fixed 8.4.4-1.1ubuntu6.1
	23.10 mantic	Fixed 8.4.4-1.1ubuntu1.4
	22.04 LTS jammy	Fixed 8.1-1ubuntu1.10
	20.04 LTS focal	Not affected
quagga	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected

Notes

sbeattie

the quagga project was renamed to frr

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
frr	Upstream: https://github.com/FRRouting/frr/pull/15674/ Upstream: 4e70b09

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Adjacent
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H