Netatalk Security Advisory
| Subject | Arbitrary code execution in copyapplfile |
|---|---|
| CVE ID# | CVE-2022-23125 |
| Date | 2022/03/21 advisory published retroactively; date is approximate |
| Versions | 3.0.0 - 3.1.12, 1.0 - 2.2.6 |
| Summary | Lack of validation of user-input data leads to remote code execution in the copyapplfile function |
Description
This vulnerability allows remote attackers to execute arbitrary code on affected Netatalk installations without requiring authentication.
The flaw resides in the copyapplfile function, where the len element is improperly handled.
The process fails to validate the length of user-supplied data before copying it into a fixed-length stack-based buffer.
An attacker can exploit this vulnerability to execute code with root-level privileges.
Patch Availability
Apply the patch with git hash d801ed4 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
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