CVE-2022-29527 affects the Amazon AWS amazon-ssm-agent prior to version 3.1.1208.0. This vulnerability allows local attackers to inject Sudo rules into a world-writable sudoers file, enabling them to escalate privileges to root level. This situation arises due to a race condition, which can be exploited under certain circumstances.
The severity of this vulnerability is classified as high, with a CVSS score of 7.0. The potential risk to organizations includes unauthorized access to sensitive systems and data, making it critical for affected users to act swiftly.
As of now, there is no confirmed public exploit available. However, the implications of this vulnerability highlight the necessity for organizations to maintain robust security practices and stay updated with patches.
Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability. Ensuring that all systems are running the latest version of the amazon-ssm-agent is crucial in maintaining security.
Vulnerability Details
The vulnerability is rooted in the improper management of file permissions, specifically the creation of a world-writable sudoers file. This issue is classified under several CWEs, including CWE-362 and CWE-732. The CVSS vector string for this vulnerability is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. This indicates a local attack vector with high complexity and low privileges required.
The vulnerability was published on April 20, 2022, and has since been modified. Organizations utilizing the Amazon AWS amazon-ssm-agent should assess their systems to ensure they are not affected by this vulnerability.
Technical Analysis
The root cause of CVE-2022-29527 lies in the creation of a world-writable sudoers file due to improper file permissions. Attackers can exploit this vulnerability through a local attack vector, requiring low privileges to execute the attack.
The attack complexity is high, meaning that successfully exploiting this vulnerability may require specific conditions or knowledge of the system's operation. No user interaction is needed for exploitation.
The impacts of this vulnerability are significant across confidentiality, integrity, and availability. Successful exploitation may lead to full control over the affected system, allowing attackers to access sensitive data and perform unauthorized actions.
Risk & Impact Analysis
Organizations that deploy the affected version of amazon-ssm-agent face substantial risks, especially if their systems are compromised through this vulnerability. The potential for privilege escalation can lead to unauthorized access to critical systems, data breaches, and overall system integrity loss.
The blast radius is considerable, as local attackers may find opportunities to escalate privileges in various environments. Organizations must prioritize this vulnerability in their patch management processes, given its high severity.
Based on the CVSS score of 7.0, the urgency is categorized as high. Immediate action is recommended to mitigate risks associated with this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch (version 3.1.1208.0) are affected by this vulnerability. Organizations should review their deployments of amazon-ssm-agent to identify any instances that may be running vulnerable versions.
Mitigation & Remediation
Organizations should ensure they are using the latest version of amazon-ssm-agent. The recommended version to upgrade to is 3.1.1208.0 or later. In addition to patching, organizations should consider implementing configuration hardening measures to limit file permissions.
For further guidance on securing your environment, organizations may refer to application security assessments and implement network controls to monitor unusual activities.
Detection Guidance
Organizations should monitor system logs for any unauthorized changes to the sudoers file or unusual privilege escalation attempts. Behavioral anomalies, such as unexpected sudo rule injections, should be flagged for further investigation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-29527 lies in its demonstration of how local privilege escalation vulnerabilities can lead to severe security breaches. Organizations need to be vigilant about file permissions and the potential for race conditions in their systems.
This vulnerability highlights the importance of adopting a proactive security posture. Regular security assessments and penetration testing can help identify weaknesses before they can be exploited.
For organizations interested in strengthening their security measures, exploring our penetration testing services can provide valuable insights.
Security teams should also stay informed about emerging trends and patterns in vulnerabilities, such as those discussed in our blog on vulnerability management practices to enhance their defensive capabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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