A stack-based buffer overflow vulnerability in the microtar library allows attackers to trigger memory corruption via maliciously crafted TAR files.

The vulnerability exists in the raw_to_header() function within src/microtar.c. It is triggered when processing TAR archives that contain name or linkname fields that lack a null terminator, leading to a stack-based buffer overflow.

This memory corruption flaw carries a CVSS score of 8.8, reflecting its potential for remote code execution or application crashes. Exploitation could allow an attacker to execute arbitrary code with the privileges of the application processing the TAR archive, leading to a total loss of confidentiality, integrity, and availability of the affected system.

Immediate Action: Update the microtar library to a patched version beyond 0.1.0 to resolve the buffer overflow condition.

Proactive Monitoring: Monitor application crash reports and system logs for signs of segmentation faults or unexpected process terminations during file processing.

Compensating Controls: Ensure that any software utilizing the microtar library is run within a restricted, sandboxed environment to limit the impact of potential memory corruption.

Public Exploit Available: false

Given the risk of remote code execution, users of the microtar library must prioritize updating to a version that includes the necessary bounds checking. Developers should also audit their own implementations to ensure untrusted TAR files are handled securely.