Advisory Details

February 6th, 2023

Netatalk dsi_writeinit Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2022-43634
CVSS SCORE	9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Netatalk
AFFECTED PRODUCTS	Netatalk
VULNERABILITY DETAILS	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 dsi_writeinit 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 heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.
ADDITIONAL DETAILS	Netatalk has issued an update to correct this vulnerability. More details can be found at: https://github.com/Netatalk/Netatalk/pull/186
DISCLOSURE TIMELINE	2022-06-03 - Vulnerability reported to vendor 2023-02-06 - Coordinated public release of advisory
CREDIT	Corentin BAYET (@OnlyTheDuck), Etienne HELLUY-LAFONT and Luca MORO (@johncool__) from Synacktiv

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