CVE-2022-40302

Disclosed 2023-05-03

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.

Severity & CVSS Score

6.5 MEDIUM CVSS 3.1

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Enumeration

CWE-ID	Name
CWE-125	Out-of-bounds Read

Affected FRR Versions

< 8.4

Versions prior to 7.5 are end-of-life and no longer receive security updates.

References

URL	Source
https://github.com/FRRouting/frr/commit/1117baca3c592877a4d8a13ed6a1d9bd83977487	GitHub
https://github.com/FRRouting/frr/commit/3e46b43e3788f0f87bae56a86b54d412b4710286	GitHub
https://github.com/FRRouting/frr/commit/766eec1b7accffe2c04a5c9ebb14e9f487bb9f78	GitHub

Git Fixes

Raw Data

CVE-2022-40302.cve.json — CVE record (JSON)
CVE-2022-40302.frr.json — FRR-specific data (JSON)