CVE-2021-25282 is a critical vulnerability impacting SaltStack Salt versions prior to 3002.5. This vulnerability allows directory traversal through the salt.wheel.pillar_roots.write method, enabling attackers to manipulate sensitive files outside of the intended directory structure.
The CVSS score for this vulnerability is 9.1, indicating a critical severity level due to the high impact on both integrity and availability. The vulnerability is categorized under CWE-22, which denotes improper restriction of operations within the bounds of a memory buffer.
Risk to organizations includes unauthorized access and potential data manipulation, with the exploitation vector being network-based and requiring no user interaction. Organizations using affected versions should prioritize patching immediately.
As of now, there is confirmed exploit availability for this vulnerability. Organizations must act swiftly to mitigate risks and protect their systems against potential exploitation.
For more insights on vulnerability management, organizations can refer to our vulnerability management program design guide.
Vulnerability Details
The vulnerability allows unauthorized access due to improper validation of user inputs in the salt.wheel.pillar_roots.write method. This can lead to directory traversal, enabling attackers to access sensitive files on the server. The affected products include SaltStack Salt, Debian Linux, and Fedora.
The official CVE description states: 'An issue was discovered in through SaltStack Salt before 3002.5. The salt.wheel.pillar_roots.write method is vulnerable to directory traversal.'
Organizations should be aware that this issue affects all versions prior to the vendor patch, with the vulnerability officially published on February 27, 2021.
Technical Analysis
The root cause of this vulnerability stems from inadequate input validation in the salt.wheel.pillar_roots.write method. Attackers can leverage this vulnerability over the network without needing to authenticate, making it particularly dangerous.
The attack complexity is low, implying that even attackers with minimal knowledge can exploit this vulnerability. No privileges are required, and user interaction is not necessary, enhancing the risk of exploitation.
Should an attacker successfully exploit this vulnerability, the potential impacts are significant: integrity and availability may be compromised, leading to severe operational disruptions.
Risk & Impact Analysis
Real-world risk involves unauthorized file access and potential data manipulation, which can severely affect organizational integrity and availability. The blast radius is considerable, affecting all deployments of the SaltStack Salt software across various operating systems including Debian and Fedora.
Given the CVSS score of 9.1, organizations should address this vulnerability in their priority patch cycle. The lack of known exploitation in the KEV catalog does not diminish the urgency to patch due to the critical nature of the vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected, including versions of SaltStack Salt, Fedora, and Debian Linux. Specific vulnerable versions include SaltStack Salt versions prior to 3002.5, Fedora versions 32, 33, and 34, and Debian Linux versions 9.0, 10.0, and 11.0.
Mitigation & Remediation
Organizations should implement the following measures to mitigate the impact of this vulnerability: apply the latest patches provided by SaltStack for the Salt software, upgrade to versions 3002.5 or later, and monitor systems for any unusual activity following the application of the patch.
If patching is not immediately feasible, consider implementing network segmentation and access controls to limit the exposure of vulnerable components.
Further guidance on security practices can be found through our penetration testing methodology article.
Detection Guidance
Organizations should monitor logs for indicators of directory traversal attempts, unusual file access patterns, and any unauthorized command executions on SaltStack instances.
Behavioral anomalies in file access should trigger alerts, and network traffic to SaltStack APIs should be closely inspected for signs of exploitation.
AppSecure Threat Intelligence Insight
The critical nature of CVE-2021-25282 highlights ongoing challenges in software supply chain security. This vulnerability serves as a reminder of the importance of continuous monitoring and timely patch application.
Security teams should take note of this vulnerability's potential to affect multiple systems and prioritize comprehensive vulnerability management strategies.
For further reading on vulnerability assessment, organizations can explore our vulnerability assessment vs penetration testing resource.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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