CVE-2022-40318

Medium

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. 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.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Frrouting

PublishedMay 3, 2023

First seenMay 3, 2023

How to fix

Vendor advisories

debian.org/security/2023/dsa-5495

Affected products

Product	Affected versions	Fixed in
frrouting frrouting	v ≤ 8.4	—
debian debian_linux	10.0, 11.0, 12.0	—

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