Remote denial of service in FRRouting FRR

1) Out-of-bounds read

EUVDB-ID: #VU82896

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-43681

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

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

External links

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

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.