CVE-2021-44513 : Security Advisory and Response

Tmate-ssh-server 2.3.0 insecurely creates temporary directories, enabling a local attacker to compromise session integrity.

Understanding CVE-2021-44513

What is CVE-2021-44513?

Tmate-ssh-server version 2.3.0 is vulnerable to insecure creation of temporary directories, allowing a local attacker to compromise session integrity.

The Impact of CVE-2021-44513

This vulnerability can be exploited by a local attacker to compromise the integrity of session handling on the affected system.

Technical Details of CVE-2021-44513

Vulnerability Description

The issue arises from the insecure creation of temporary directories in tmate-ssh-server 2.3.0, which can be exploited by a local attacker.

Affected Systems and Versions

Product: Not Applicable
Vendor: Not Applicable
Version: 2.3.0 (affected)

Exploitation Mechanism

The vulnerability allows a local attacker to compromise the integrity of session handling on the tmate-ssh-server 2.3.0.

Mitigation and Prevention

Immediate Steps to Take

Update tmate-ssh-server to a non-vulnerable version.
Monitor and restrict access to sensitive directories.

Long-Term Security Practices

Implement the principle of least privilege to limit access rights.
Regularly audit and monitor the creation and use of temporary directories.

Patching and Updates

Apply patches provided by the vendor to fix the insecure directory creation issue in tmate-ssh-server.