CVE-2022-27650 : What You Need to Know

A detailed overview of CVE-2022-27650 focusing on the impact, technical details, and mitigation strategies.

Understanding CVE-2022-27650

CVE-2022-27650 is a vulnerability found in crun affecting versions prior to v1.4.4. The flaw allows attackers to elevate Linux process capabilities when execve(2) runs.

What is CVE-2022-27650?

A flaw was discovered in crun that incorrectly starts containers with non-empty default permissions, leading to a security vulnerability in Moby (Docker Engine) where containers are started with non-empty inheritable Linux process capabilities.

The Impact of CVE-2022-27650

The vulnerability in CVE-2022-27650 enables attackers with access to programs with inheritable file capabilities to escalate those capabilities to the permitted set during execve(2) execution.

Technical Details of CVE-2022-27650

This section covers the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The flaw allows containers to be started with non-empty default permissions, potentially exposing inheritable Linux process capabilities.

Affected Systems and Versions

CVE-2022-27650 affects crun versions up to v1.4.3, with the fix implemented in v1.4.4.

Exploitation Mechanism

Attackers can leverage the vulnerability to elevate Linux process capabilities during execve(2) execution.

Mitigation and Prevention

Here we discuss immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Security measures such as updating crun to v1.4.4 and reviewing container default permissions are recommended.

Long-Term Security Practices

Regular security audits, container hardening, and monitoring of Linux process capabilities are essential for long-term protection.

Patching and Updates

Stay informed about security advisories and promptly apply patches to mitigate vulnerabilities.