CVE-2022-27651 is a medium-severity vulnerability affecting the Buildah project. This vulnerability allows containers to be started with incorrect default permissions, enabling an attacker to exploit inheritable Linux process capabilities. The flaw in Moby (Docker Engine) can lead to unauthorized elevation of process capabilities, impacting the confidentiality and integrity of affected systems. With a CVSS score of 6.8, this vulnerability poses a significant risk to organizations leveraging these technologies.
Given the potential for exploitation, organizations must understand the urgency of addressing this vulnerability. Attackers may leverage this flaw to gain elevated permissions within the container environment, enabling further attacks on the system. Organizations should prioritize remediation efforts to prevent exploitation and maintain the integrity of their systems.
No public exploits have been confirmed, and the vulnerability is not actively exploited according to the latest intelligence. However, the presence of this flaw in widely used technologies means that organizations should remain vigilant and proactive in their patch management practices.
Organizations should prioritize patching immediately to mitigate the impact of this vulnerability. Regular assessments and updates are essential to protect against potential threats and maintain a secure operational environment.
Vulnerability Details
A flaw was found in Buildah where containers were incorrectly started with non-empty default permissions. This flaw potentially allows an attacker with access to programs with inheritable file capabilities to elevate those capabilities when execve(2) runs. The CVSS base score of 6.8 indicates a medium severity level, reflecting the potential impact on confidentiality and integrity.
The affected products include Buildah, Fedora (versions 34, 35, and 36), and Red Hat Enterprise Linux (versions 7.0 and 8.0). The vulnerability was published on April 4, 2022, and is assigned to CWE-276, which refers to incorrect default permissions.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of container permissions within Buildah and the Docker Engine. Containers were started with non-empty inheritable Linux process capabilities, which can be exploited by attackers to gain unauthorized access.
The attack vector for this vulnerability is network-based, requiring low privileges for exploitation. No user interaction is necessary, making this vulnerability particularly concerning for organizations utilizing containerized applications.
The attack complexity is classified as high, indicating that attackers would need to have specific knowledge of the vulnerabilities within the container environment to successfully exploit it. The confidentiality and integrity impacts are rated as high, while availability impact is none.
Risk & Impact Analysis
Risk to organizations includes unauthorized elevation of privileges, leading to potential data breaches and compromise of sensitive information. The vulnerability affects container security, which is critical for organizations deploying applications in cloud or virtualized environments.
The blast radius of this vulnerability can extend across all applications running within the affected container environments, exposing them to a range of attacks. Organizations should assess their exposure and prioritize remediation strategies based on the criticality of their containerized applications.
Given the CVSS score of 6.8 and the lack of active exploitation, organizations should address this vulnerability in their priority patch cycle to prevent future incidents.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions are affected by CVE-2022-27651: Buildah versions prior to 1.25.0, Fedora versions 34, 35, and 36, and Red Hat Enterprise Linux versions 7.0 and 8.0.
Mitigation & Remediation
Organizations should apply patches as soon as they are available to mitigate the risk associated with this vulnerability. Upgrading to the latest version of Buildah and related packages is crucial. If immediate patching is not possible, implementing strict configuration management and monitoring can help reduce the attack surface. Consider leveraging penetration testing to identify potential weaknesses in your implementation.
Detection Guidance
Organizations should monitor logs for any unauthorized access attempts to containerized applications. Behavioral anomalies, such as unexpected container behavior or privilege escalation, should also be flagged for review. Implementing network signatures to detect unusual traffic patterns can further enhance security monitoring.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-27651 highlights the ongoing challenges associated with container security. As organizations increasingly adopt containerized environments, understanding and mitigating vulnerabilities becomes critical for maintaining a secure infrastructure. This vulnerability represents a pattern where misconfigurations in container permissions can lead to severe implications.
Security teams should prioritize training on secure container practices and regularly audit their container deployments. For organizations utilizing cloud environments, consider engaging in a cloud penetration testing strategy to identify and remediate potential vulnerabilities.
Regular updates to security policies and incident response plans can help organizations adapt to the evolving threat landscape. Engaging in proactive security testing and leveraging threat intelligence can provide organizations with the insights needed to fortify their defenses against threats like CVE-2022-27651.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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