#VU72143 Heap-based buffer overflow in Netatalk - CVE-2022-43634

Vulnerability identifier: #VU72143

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-43634

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Netatalk
Server applications / File servers (FTP/HTTP)

Vendor: Netatalk

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 dsi_writeinit() function in libatalk/dsi/dsi_write.c. A remote attacker can send specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Netatalk: 2.0.0 - 3.1.13

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External links
https://www.zerodayinitiative.com/advisories/ZDI-23-094/
https://github.com/Netatalk/Netatalk/pull/186/files
https://github.com/Netatalk/Netatalk/pull/186

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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.