Remote code execution in FreeBSD ping(8)

1) Stack-based buffer overflow

EUVDB-ID: #VU69732

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 - Stack-based buffer overflow

Exploit availability: Yes

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

CPE2.3

• cpe:2.3:o:freebsd_foundation:freebsd:12.0:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd_foundation:freebsd:12.1:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd_foundation:freebsd:12.2-RELEASE-p6:*:*:*:*:*:*:*

External links

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

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.