#VU82896 Out-of-bounds read in frr - CVE-2022-43681

Vulnerability identifier: #VU82896

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-43681

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
frr
Other software / Other software solutions

Vendor: frrouting.org

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in the BGP daemon. A remote attacker can send a malformed BGP OPEN message that ends with the option length octet (or the option length word, in case of an extended OPEN message), trigger an out-of-bounds read error and crash the daemon.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

frr: 8.0 - 8.4

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External links
https://www.debian.org/security/2023/dsa-5495
https://lists.debian.org/debian-lts-announce/2023/09/msg00020.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.