CVE-2022-2781 in Server
Summary
by MITRE • 10/06/2022
In affected versions of Octopus Server it was identified that the same encryption process was used for both encrypting session cookies and variables.
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Analysis
by VulDB Data Team • 05/27/2026
The vulnerability identified in CVE-2022-2781 affects Octopus Server versions where the encryption mechanism employed for session cookies and variable encryption shares identical cryptographic processes. This represents a significant security weakness that undermines the fundamental principle of cryptographic separation and isolation. The flaw exists within the server's security architecture where the same encryption algorithm and key derivation process are applied to two distinct security contexts, creating potential attack vectors that could be exploited by malicious actors. This vulnerability is classified under CWE-327, which addresses the use of insecure cryptographic algorithms, and specifically relates to the improper implementation of cryptographic practices within application security frameworks.
The technical implementation of this vulnerability stems from the server's failure to maintain distinct encryption contexts for different security-sensitive data types. Session cookies require protection against session hijacking and replay attacks, while encrypted variables may contain sensitive configuration data, credentials, or operational parameters that demand different security guarantees. When both data types utilize identical encryption processes, an attacker who compromises one context gains insights that could potentially be leveraged to compromise the other. This cross-contamination of encryption processes violates the principle of defense in depth and creates cascading security risks within the system's architecture.
The operational impact of this vulnerability extends beyond simple data exposure, as it enables attackers to potentially escalate privileges and gain unauthorized access to critical system components. An adversary who successfully decrypts session cookies could maintain persistent access to the Octopus Server interface, while the same vulnerability could expose encrypted variables that might contain deployment credentials, connection strings, or other sensitive operational data. This vulnerability aligns with ATT&CK technique T1552.001, which covers unsecured credentials, and T1078.004, which addresses valid accounts used for lateral movement, as the compromised session tokens could facilitate further unauthorized access attempts.
Organizations utilizing affected Octopus Server versions face significant risk exposure due to this cryptographic weakness. The vulnerability creates opportunities for attackers to perform session manipulation attacks, credential harvesting, and potentially gain access to production environments through compromised deployment configurations. Security teams must consider this vulnerability as part of their broader threat modeling activities, particularly when assessing the risk of insider threats and external attacks targeting CI/CD pipelines. The impact is amplified in environments where Octopus Server manages critical infrastructure deployments and where the encrypted variables contain sensitive operational data.
Recommended mitigations include immediate upgrading to patched versions of Octopus Server where distinct encryption processes are implemented for session cookies and variable encryption. Organizations should also implement monitoring for unauthorized access attempts and session anomalies that could indicate exploitation of this vulnerability. The cryptographic implementation should be reviewed to ensure that different key derivation functions, initialization vectors, and encryption algorithms are used for different security contexts. Additionally, security configurations should be audited to verify that the server's encryption practices comply with industry standards and that proper cryptographic separation is maintained between different data types within the system.