CVE-2026-44072 in Netatalk
Summary
by MITRE • 05/21/2026
Netatalk 2.2.1 through 4.4.2 calls system() after a failed chdir() without properly handling the error condition, which allows a local privileged user to execute unintended commands or cause a minor service disruption under specific conditions.
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Analysis
by VulDB Data Team • 05/24/2026
Netatalk is a comprehensive open source implementation of the AppleShare protocol that enables file sharing between unix systems and apple devices. The vulnerability exists in versions 2.2.1 through 4.4.2 where the software fails to properly handle error conditions during directory change operations. When a chdir() system call fails, the application subsequently invokes system() without checking whether the previous chdir() operation succeeded, creating a potential command injection vector. This flaw falls under the category of improper error handling as defined by CWE-754 and represents a specific instance of CWE-78 which deals with OS command injection vulnerabilities. The vulnerability is particularly concerning because it requires a local privileged user to exploit, meaning an attacker must already have some level of access to the system to leverage this weakness. The attack scenario typically involves an authenticated user who can manipulate the file system to trigger the specific error condition that leads to the unintended system() call. This type of vulnerability is classified under ATT&CK technique T1059.003 for command and scripting interpreter and T1068 for local privilege escalation. The operational impact of this vulnerability includes potential unauthorized command execution with elevated privileges and possible service disruption. While the disruption is described as minor, the ability to execute unintended commands with privileged access represents a significant security risk that could be exploited to escalate privileges or gain additional system access. The vulnerability is particularly dangerous in environments where Netatalk services run with elevated privileges or where local users have access to the system. The flaw demonstrates poor defensive programming practices where error conditions are not properly validated before proceeding with potentially dangerous operations. Organizations running affected Netatalk versions should immediately apply patches or updates that address this specific error handling issue. The mitigation strategy involves ensuring that all system calls are properly validated before proceeding with subsequent operations, particularly when system() or similar functions are involved. Additionally, implementing proper input validation and privilege separation can help reduce the attack surface and prevent exploitation of this type of vulnerability. The issue highlights the importance of robust error handling in security-critical applications and demonstrates how seemingly minor programming errors can have significant security implications. System administrators should monitor for any unauthorized command execution attempts and ensure that Netatalk services are running with the principle of least privilege to minimize potential damage from such vulnerabilities.