CVE-2022-23125 : netatalk - copyapplfile Stack-based Buffer Overflow Remote Code Execution

Versions Affected : All versions prior to TrueNAS Core 12.0-U8.1.
To verify if a system isvulnerable, run afpd -v. Systems with a version string that is not 3.1.13 or newer are vulnerable.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Netatalk. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the copyapplfile function. When parsing the len element, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Base score 6.1

No workarounds available

• Disable affected AFP shares until upgrade is possible
• Upgrade to TrueNAS 12.0-U8.1

• TrueNAS Jira Ticket NAS-113284
• TrueNAS CORE 12.0 Commit

• MITRE CVE-2022-23125 Entry

• NIST NVD Entry