CVE-2022-48303 : Security Advisory and Response

A one-byte out-of-bounds read vulnerability in GNU Tar through version 1.34 has been identified, leading to the use of uninitialized memory for a conditional jump. This CVE has the potential for exploitation to change the flow of control, although no demonstrations have been reported. The vulnerability arises in the from_header function in list.c through a V7 archive containing approximately 11 whitespace characters in the mtime field.

Understanding CVE-2022-48303

This section delves into the impact and technical details of CVE-2022-48303.

What is CVE-2022-48303?

The CVE-2022-48303 vulnerability involves a one-byte out-of-bounds read in GNU Tar up to version 1.34, resulting in the utilization of uninitialized memory.

The Impact of CVE-2022-48303

Although exploitation demonstrating control flow modification has not been shown, the potential risk lies in the manipulation of the flow of control within affected systems.

Technical Details of CVE-2022-48303

Below are the technical specifics regarding the vulnerability.

Vulnerability Description

The flaw originates in GNU Tar's from_header function in list.c when processing a V7 archive with whitespace characters in the mtime field.

Affected Systems and Versions

All versions of GNU Tar up to 1.34 are affected by CVE-2022-48303.

Exploitation Mechanism

While exploitation demonstrating flow control alteration has not been proven, the vulnerability could allow attackers to manipulate control within the affected system.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2022-48303.

Immediate Steps to Take

Users are advised to update GNU Tar to a patched version or apply vendor-supplied fixes to address the vulnerability.

Long-Term Security Practices

Regularly monitoring for security advisories and promptly applying patches is crucial to maintaining a secure environment.

Patching and Updates

Stay informed about security updates from GNU Tar and promptly apply any patches released by the vendor to safeguard against CVE-2022-48303.