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Vulnerability record · CVE-2022-43634 · published 29 March 2023

CVE-2022-43634: Netatalk heap-based buffer overflow vulnerability

Netatalk · Netatalk

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. Was ZDI-CAN-17646.

9.8 CVSS 3.1 Critical EPSS 19% · top 2.8% CWE-122 · Heap-based buffer overflow
9.8CVSS 3.1 base score
19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

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 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. Was ZDI-CAN-17646.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Netatalk/Netatalk/pull/186 Patch
https://lists.debian.org/debian-lts-announce/2023/05/msg00018.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZYWSGVA6WXREMB6PV56HAH
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GEAFLA5L2SHOUFBAGUXIF2T
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SG6WZW5LXFVH3P7ZVZRGHUV
https://www.debian.org/security/2023/dsa-5503
https://www.zerodayinitiative.com/advisories/ZDI-23-094/ Third Party AdvisoryVDB Entry
https://github.com/Netatalk/Netatalk/pull/186 Patch
https://lists.debian.org/debian-lts-announce/2023/05/msg00018.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZYWSGVA6WXREMB6PV56HAH
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GEAFLA5L2SHOUFBAGUXIF2T
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SG6WZW5LXFVH3P7ZVZRGHUV
https://www.debian.org/security/2023/dsa-5503
https://www.zerodayinitiative.com/advisories/ZDI-23-094/ Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-38439Netatalk out-of-bounds write vulnerabilityNetatalk before 3.2.1 has an off-by-one error and resultant heap-based buffer overflow because of setting ibuf[PASSWDLEN] to '\0' in FPLoginExt in lo…EPSS 0.93%9.8CVE-2024-38441Netatalk vulnerabilityNetatalk before 3.2.1 has an off-by-one error and resultant heap-based buffer overflow because of setting ibuf[len] to '\0' in FPMapName in afp_mapna…EPSS 0.92%9.8CVE-2023-42464Netatalk type confusion vulnerabilityA Type Confusion vulnerability was found in the Spotlight RPC functions in afpd in Netatalk 3.1.x before 3.1.17. When parsing Spotlight RPC packets, …EPSS 2.1%9.8CVE-2022-23121Netatalk vulnerabilityThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Netatalk. Authentication is not required to exploit…EPSS 8.6%9.8CVE-2022-23122Netatalk stack-based buffer overflow vulnerabilityThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Netatalk. Authentication is not required to exploit…EPSS 4.4%9.8CVE-2022-23123Netatalk out-of-bounds read vulnerabilityThis vulnerability allows remote attackers to disclose sensitive information on affected installations of Netatalk. Authentication is not required to…EPSS 3.8%9.8CVE-2022-23124Netatalk out-of-bounds read vulnerabilityThis vulnerability allows remote attackers to disclose sensitive information on affected installations of Netatalk. Authentication is not required to…EPSS 2.8%9.8CVE-2022-23125Netatalk stack-based buffer overflow vulnerabilityThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Netatalk. Authentication is not required to exploit…EPSS 4.4%

Source: NIST National Vulnerability Database (record CVE-2022-43634), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.