CVE-2022-27651 Explained : Impact and Mitigation
Learn about CVE-2022-27651, a flaw in buildah containers leading to incorrect default permissions and potential elevation of capabilities, impacting confidentiality and integrity. Find mitigation steps and affected versions.
A detailed overview of CVE-2022-27651 focusing on the vulnerability found in buildah containers.
Understanding CVE-2022-27651
This section delves into the nature of the vulnerability and its potential impact.
What is CVE-2022-27651?
CVE-2022-27651 involves a flaw in buildah that incorrectly starts containers with non-empty default permissions. This bug in the Moby (Docker Engine) allows containers to begin with non-empty inheritable Linux process capabilities, potentially enabling attackers to elevate their capabilities, impacting confidentiality and integrity.
The Impact of CVE-2022-27651
The vulnerability poses a significant risk as it allows attackers with access to programs with inheritable file capabilities to increase their permissions when execve(2) runs, potentially compromising data confidentiality and integrity.
Technical Details of CVE-2022-27651
Explore the specifics of the CVE-2022-27651 vulnerability in this section.
Vulnerability Description
The flaw in buildah results in containers starting with incorrect default permissions, while the bug in Moby triggers containers to initiate with non-empty inheritable Linux process capabilities.
Affected Systems and Versions
Buildah versions up to v1.24.0 are affected by this vulnerability, with the issue being fixed in v1.25.0.
Exploitation Mechanism
Attackers with access to programs with inheritable file capabilities can exploit this vulnerability to elevate their permissions through the execve(2) command.
Mitigation and Prevention
Discover the steps to mitigate and prevent the exploitation of CVE-2022-27651 in this section.
Immediate Steps to Take
Users are advised to update to buildah version 1.25.0 or later to mitigate the vulnerability.
Long-Term Security Practices
Implementing regular security updates, monitoring container permissions, and following secure coding practices can enhance long-term security.
Patching and Updates
Staying updated with the latest patches and security advisories is crucial to ensure the protection of containerized environments.