CVE-2018-11320 in Octopus Deploy
Summary
by MITRE
In Octopus Deploy 2018.4.4 through 2018.5.1, Octopus variables that are sourced from the target do not have sensitive values obfuscated in the deployment logs.
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Analysis
by VulDB Data Team • 03/14/2023
The vulnerability identified as CVE-2018-11320 affects Octopus Deploy versions between 2018.4.4 and 2018.5.1, representing a critical security flaw in how the deployment automation platform handles sensitive variable data. This issue falls under the category of information exposure through log files, where confidential data intended to remain protected is inadvertently disclosed in deployment logs. The vulnerability specifically impacts variables that are sourced from target systems, meaning that when deployment processes retrieve sensitive information from remote targets, this data is not properly obfuscated in the logging output. This represents a significant deviation from security best practices and industry standards such as those outlined in the OWASP Top Ten, which emphasizes the importance of protecting sensitive data in all system outputs including logs and audit trails. The flaw creates an avenue for unauthorized information disclosure that could potentially expose credentials, encryption keys, or other confidential data that deployment processes require to execute successfully against target environments.
The technical implementation of this vulnerability stems from the insufficient sanitization of variable values within the logging mechanisms of Octopus Deploy. When variables are configured to pull values from target systems during deployment operations, the system fails to apply proper obfuscation techniques to mask sensitive data before writing it to log files. This occurs because the logging subsystem does not differentiate between regular and sensitive variables, treating all variable values with equal visibility in the output. From a cybersecurity perspective, this vulnerability aligns with CWE-200, which describes improper exposure of sensitive information, and represents a failure in the principle of least privilege and data protection in logging systems. The issue is particularly concerning because deployment logs often contain detailed information about system operations, including environment configurations, target host details, and variable values that may include passwords, API keys, or other authentication tokens. The lack of obfuscation means that any individual with access to the deployment logs can directly extract sensitive credentials without requiring additional exploitation techniques.
The operational impact of this vulnerability extends beyond simple information disclosure, creating potential pathways for privilege escalation and lateral movement within target environments. Attackers who gain access to deployment logs can extract authentication credentials and use them to compromise additional systems or escalate their access within the deployment infrastructure. This vulnerability particularly affects organizations that rely heavily on automated deployment processes and maintain detailed logging for operational troubleshooting or compliance purposes. The exposure of sensitive variables in logs creates a persistent security risk since these logs are often retained for extended periods and may be accessible to multiple users or systems within the organization. From an ATT&CK framework perspective, this vulnerability maps to techniques involving credential access and privilege escalation through log analysis, potentially enabling adversaries to move laterally within the network by leveraging stolen credentials from deployment logs. Organizations using Octopus Deploy in production environments face significant risk of unauthorized access to their target systems if sensitive deployment variables are not properly protected.
Mitigation strategies for CVE-2018-11320 require immediate remediation through version upgrades to Octopus Deploy 2018.5.2 or later, which includes the necessary fixes to properly obfuscate sensitive variable values in deployment logs. Organizations should also implement additional logging controls to ensure that sensitive data is not inadvertently exposed in any system outputs, including automated deployment processes. The implementation of proper variable management practices should include configuration of sensitive variables to automatically mask their values in all logging contexts, regardless of the source. Security teams should conduct comprehensive reviews of existing deployment logs to identify and remediate any previously exposed sensitive information, implementing log monitoring solutions that can detect and alert on potential credential exposure. Organizations should also consider implementing additional access controls around deployment log files, ensuring that only authorized personnel have access to these sensitive operational records. The vulnerability highlights the importance of maintaining up-to-date security practices and regular vulnerability assessments to identify and remediate similar issues in deployment automation platforms. From a compliance standpoint, this vulnerability may violate standards such as pci dss, hipaa, and soc 2, which require protection of sensitive data in all system outputs and logging mechanisms.