Vulnerability identifier: #VU82899

Vulnerability 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-2023-47234

CWE-ID: CWE-20

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 insufficient validation of user-supplied input when processing a crafted BGP UPDATE message with a MP_UNREACH_NLRI attribute and additional NLRI data (that lacks mandatory path attributes). A remote attacker can send specially crafted messages to the daemon and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

frr: 9.0 - 9.0.1

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External links
http://github.com/FRRouting/frr/pull/14716/commits/c37119df45bbf4ef713bc10475af2ee06e12f3bf

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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.