CyberRota Analysis
AI-GeneratedVersions 3.1.19 through 4.4.2 of Netatalk are vulnerable to a stack-based buffer overflow in the deletedir() function of the afpd daemon, stemming from an integer underflow that leads to improper boundary checks. This flaw allows for unbounded copying of attacker-controlled filenames into a stack buffer, potentially enabling remote code execution. Organizations using affected versions of Netatalk should prioritize upgrading to version 4.4.3 or later to mitigate this high-severity vulnerability.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
Netatalk is a Free and Open Source file server suite for Unix-like operating systems. In versions 3.1.19 through 4.4.2, a stack-based buffer overflow exists in the deletedir() function of Netatalk's afpd daemon due to an integer underflow in the calculation of the remaining buffer size used for path construction. deletedir() is a utility function called when a file operation crosses a device boundary inside an AFP shared volume, which the standard library's renameat() cannot handle. The function attempts to prevent buffer overflows by tracking available space in a size_t remain variable. However, the arithmetic used to compute remain results in an unsigned integer underflow, causing the variable to become SIZE_MAX. Because of this, the subsequent boundary check always evaluates as safe, allowing an unbounded strcpy() operation to copy attacker-controlled filenames into a nearly full stack buffer. Version 4.4.3 patches the issue.