#VU69732 Stack-based buffer overflow in FreeBSD - CVE-2022-23093

Vulnerability identifier: #VU69732

Vulnerability risk: High

CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2022-23093

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
FreeBSD
Operating systems & Components / Operating system

Vendor: FreeBSD Foundation

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the pr_pack() function in ping(8) when processing IP option headers following the IP header in either the response or the quoted packet. A remote attacker can send a specially crafted ICMP response to the affected system, trigger a stack-based buffer overflow and potentially execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires the victim to ping a malicious host.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 12.0 - 13.1

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External links
https://www.freebsd.org/security/advisories/FreeBSD-SA-22:15.ping.asc

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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. However, proof of concept for this vulnerability is available.