CVE-2020-11651 is a critical vulnerability identified in SaltStack Salt, which allows remote users to access certain methods without authentication. This issue is present in versions prior to 2019.2.4 and 3000 before 3000.2. The vulnerability results from the salt-master process's ClearFuncs class failing to validate method calls properly. Attackers exploiting this flaw can retrieve user tokens from the salt master and execute arbitrary commands on salt minions, leading to severe security breaches.
With a CVSS score of 9.8, this vulnerability is classified as critical, highlighting its potential impact on confidentiality, integrity, and availability. Organizations using affected versions of SaltStack Salt are at significant risk. The exploitation status is further underscored by its inclusion in the Known Exploited Vulnerabilities (KEV) catalog, indicating its active exploitation in the wild. Organizations should prioritize patching immediately.
Given the nature of this vulnerability, the urgency for organizations to address it cannot be overstated. The potential for unauthorized access and command execution poses considerable risks, making immediate remediation essential for maintaining security posture.
Organizations using SaltStack should review their deployment configurations and apply the necessary updates as per vendor recommendations to mitigate the risks associated with CVE-2020-11651.
Vulnerability Details
An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2. The salt-master process ClearFuncs class does not properly validate method calls. This allows a remote user to access some methods without authentication. These methods can be used to retrieve user tokens from the salt master and/or run arbitrary commands on salt minions.
The CVSS score for this vulnerability is 9.8, categorized as critical. This high score reflects the significant impact that successful exploitation could have on an organization, including high confidentiality, integrity, and availability impacts.
Affected products include Salt, and various Linux distributions such as Debian and Ubuntu. The vulnerability was published on April 30, 2020.
Technical Analysis
The root cause of CVE-2020-11651 lies in the improper validation of method calls within the ClearFuncs class of the salt-master process. This vulnerability can be exploited over the network, with low attack complexity and no privileges required for exploitation. User interaction is not necessary, enhancing the ease of exploitation.
In terms of impact, successful exploitation can lead to high confidentiality, integrity, and availability consequences. Attackers may retrieve sensitive user tokens and execute commands on salt minions, compromising the entire infrastructure.
Risk & Impact Analysis
Organizations running affected versions of SaltStack Salt face significant deployment risks. The vulnerability allows attackers to bypass authentication, potentially leading to unauthorized data access and manipulation. The blast radius for this vulnerability is extensive, affecting not only the salt-master but also all connected salt minions.
Given the CVSS score of 9.8 and its listing in the KEV catalog, organizations must assess and address this vulnerability as part of their priority patch cycle. The likelihood of exploitation in the wild reinforces the urgency for defenders to take action.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The following versions of SaltStack Salt are affected: all versions before 2019.2.4 and 3000 before 3000.2. Additionally, various Linux distributions, including OpenSUSE, Debian, and Ubuntu, are also vulnerable.
Mitigation & Remediation
Organizations must apply updates as per vendor instructions to mitigate this vulnerability. The recommended action is to upgrade to versions that are not affected by this vulnerability. For SaltStack, this includes updating to versions 2019.2.4 or later and 3000.2 or later.
If immediate patching is not possible, organizations should consider implementing additional network controls to restrict access to the salt-master process and monitor for unusual activity that might indicate exploitation attempts.
Continuous security testing should also be considered to validate the effectiveness of the applied mitigations.
Detection Guidance
To detect potential exploitation, organizations should monitor the following indicators: log entries related to unauthorized method calls, unusual access patterns to the salt-master, and any signs of unauthorized command execution on salt minions.
Behavioral anomalies in network traffic associated with the salt-master should also be investigated. Implementing network signatures that can identify attempts to exploit this vulnerability could aid in early detection.
AppSecure Threat Intelligence Insight
CVE-2020-11651 reflects a concerning trend in authentication bypass vulnerabilities within popular software frameworks. This vulnerability serves as a reminder for security teams to implement robust validation mechanisms in their applications.
Security teams should take this opportunity to review their security posture and ensure that proper authentication and authorization checks are in place to prevent similar vulnerabilities. The incident underscores the importance of adhering to best practices in software development, including regular security assessments and updates.
For further insights on managing vulnerabilities and implementing effective security measures, organizations may benefit from exploring our vulnerability management program and our comprehensive penetration testing methodology resources.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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