Netatalk Security Advisory
- Subject
- Arbitrary code execution in ad_addcomment
- CVE ID
- CVE-2022-0194
- Date of Publishing
- 2022/03/21 advisory published retroactively; date is approximate
- Affected Netatalk Versions
- 3.0.0 - 3.1.12
- 1.5.0 - 2.2.6
- Summary
- Lack of validation of user-input data leads to buffer overflow and remote code execution
Description
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 ad_addcomment function. The issue results from the lack of proper validation of 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.
Patch Availability
Apply the patch with git hash 4a8f6c9 to hotfix your local Netatalk deployment.
Additionally, Netatalk 3.1.13 and 2.2.7 have been released which contains the security patch. Netatalk administrators are advised to upgrade to this version or apply the patch as soon as possible.
CVSS Calculation
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (9.8)
Workaround
None.
Credits
- Vulnerability found and reported by:
- Theori (@theori_io)
- Patch developed by:
- Ralph Boehme of the Netatalk and Samba teams
