Vulnerability · Published Apr 3, 2023 · Assigned by mitre
CVE-2022-36440
High 7.5
In plain English
A high-severity security flaw in the frr package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.6%top 23.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:9 | frr | 8.3.1-11.el9_3.alma.1 | ALSA-2023:6434 |
| AlmaLinux:9 | frr-selinux | 8.3.1-11.el9_3.alma.1 | ALSA-2023:6434 |
| Debian:12 | frr | 8.4.1-1 | DEBIAN-CVE-2022-36440 |
| Debian:13 | frr | 8.4.1-1 | DEBIAN-CVE-2022-36440 |
| Debian:14 | frr | 8.4.1-1 | DEBIAN-CVE-2022-36440 |
| Ubuntu:22.04:LTS | frr | 8.1-1ubuntu1.3 | UBUNTU-CVE-2022-36440 |
Affected products (as reported)
References
- https://github.com/spwpun/pocs
- https://github.com/spwpun/pocs/blob/main/frr-bgpd.md
- FEDORA-2023-14ec79ae02 vendor-advisory
- FEDORA-2023-2cb0f34efe vendor-advisory
- FEDORA-2023-77d00facd0 vendor-advisory
- DSA-5495 vendor-advisory
- [debian-lts-announce] 20230919 [SECURITY] [DLA 3573-1] frr security update mailing-list