CVE-2022-22934 in Salt
Summary
by MITRE • 03/29/2022
An issue was discovered in SaltStack Salt in versions before 3002.8, 3003.4, 3004.1. Salt Masters do not sign pillar data with the minion’s public key, which can result in attackers substituting arbitrary pillar data.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 04/01/2022
The vulnerability identified as CVE-2022-22934 represents a critical security flaw in SaltStack Salt configuration management system that affects versions prior to 3002.8, 3003.4, and 3004.1. This issue stems from the improper handling of pillar data authentication within the Salt master system, creating a significant attack surface that adversaries can exploit to manipulate sensitive configuration information. The flaw specifically targets the cryptographic verification mechanisms that should ensure data integrity between Salt masters and minions, fundamentally undermining the security model of the configuration management platform.
The technical root cause of this vulnerability lies in the absence of proper digital signatures applied to pillar data by Salt Masters before transmitting information to minions. Pillar data in SaltStack serves as a critical component for storing sensitive configuration information, including credentials, secrets, and environment-specific settings that minions require to function correctly. When Salt Masters fail to sign this pillar data with the minion's public key, the system cannot verify that the received information originates from a legitimate source. This cryptographic gap enables attackers to intercept communications and substitute malicious pillar data, potentially compromising the entire configuration management infrastructure. The vulnerability aligns with CWE-347, which addresses improper verification of cryptographic signatures, and represents a significant deviation from established security practices for maintaining data integrity in distributed systems.
The operational impact of CVE-2022-22934 extends far beyond simple data manipulation, as it enables attackers to potentially gain unauthorized access to critical system resources and sensitive information. When an attacker successfully substitutes pillar data, they can redirect minions to use incorrect credentials, modify network configurations, or inject malicious commands that execute on target systems. This vulnerability particularly affects environments where SaltStack is used for managing sensitive infrastructure, as the substituted data could contain database passwords, API keys, or other privileged access credentials. The attack vector typically involves man-in-the-middle scenarios where network traffic is intercepted and modified, allowing adversaries to compromise the trust relationship between Salt masters and minions. According to ATT&CK framework, this vulnerability maps to technique T1552.001 for unsecured credentials and T1071.004 for application layer protocol usage, demonstrating how the flaw can be leveraged for credential theft and lateral movement within compromised environments.
Organizations affected by this vulnerability should implement immediate mitigations including upgrading to patched versions of SaltStack Salt that properly implement pillar data signing with minion public keys. The recommended approach involves deploying Salt Masters with versions 3002.8, 3003.4, or 3004.1, which include the necessary cryptographic verification mechanisms. Additionally, network administrators should consider implementing additional security controls such as encrypted communication channels, network segmentation, and monitoring for unusual pillar data modifications. The vulnerability highlights the importance of maintaining up-to-date security practices and proper cryptographic implementation in distributed configuration management systems. Organizations should also conduct thorough audits of their pillar data configurations and implement automated monitoring to detect unauthorized modifications, as the impact of this vulnerability can cascade across multiple systems that depend on compromised configuration data. The security community recognizes this flaw as a critical concern for any organization relying on SaltStack for infrastructure automation and configuration management.