#VU67279 Use-after-free in frr - CVE-2022-37035

Vulnerability identifier: #VU67279

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-37035

CWE-ID: CWE-416

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 compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing BGP packets within the bgp_notify_send_with_data() and bgp_process_packet() function in bgp_packet.c. A remote attacker can send specially crafted BGP packets to the affected daemon, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

frr: 2.0 - 8.3

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External links
https://docs.google.com/document/d/1TqYEcZbFeDTMKe2N4XRFwyAjw_mynIHfvzwbx1fmJj8/edit?usp=sharing
https://github.com/FRRouting/frr/issues/11698

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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.