Out-of-bounds Read in Frrouting
CVE-2022-40318
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. NOTE: this behavior occurs in bgp_open_option_parse in the bgp_open.c file, a different location (with a different attack vector) relative to CVE-2022-40302.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.020 (79.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Frrouting
- Debian Linux — versions 10.0, 11.0, 12.0
Weakness classification (CWE)
References
- github.com/FRRouting/frr/releases (Third Party Advisory)
- www.debian.org/security/2023/dsa-5495 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/09/msg00020.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-40318?
- CVE-2022-40318 is a medium-severity vulnerability in Frrouting, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2023-05-03.
- How severe is CVE-2022-40318?
- Medium severity. CVSS v3 base score is 6.5 out of 10.