Description
An issue was discovered in bgpd in FRRouting (FRR) through 8.4. By crafting a BGP OPEN message with an option of type 0xff (Extended Length from RFC 9072), attackers may cause a denial of service (assertion failure and daemon restart, or out-of-bounds read). This is possible because of inconsistent boundary checks that do not account for reading 3 bytes (instead of 2) in this 0xff case.
References (3)
Core 3
Core References
Third Party Advisory
https://github.com/FRRouting/frr/releases
Third Party Advisory vendor-advisory
https://www.debian.org/security/2023/dsa-5495
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2023/09/msg00020.html
Scores
CVSS v3
6.5
EPSS
0.0017
EPSS Percentile
37.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-125
Status
published
Products (4)
debian/debian_linux
10.0
debian/debian_linux
11.0
debian/debian_linux
12.0
frrouting/frrouting
< 8.4
Published
May 03, 2023
Tracked Since
Feb 18, 2026