CVE-2019-19375 in Octopus Deploy
Summary
by MITRE
In Octopus Deploy before 2019.10.7, in a configuration where SSL offloading is enabled, the CSRF cookie was sometimes sent without the secure attribute. (The fix for this was backported to LTS versions 2019.6.14 and 2019.9.8.)
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Analysis
by VulDB Data Team • 03/05/2024
The vulnerability identified as CVE-2019-19375 affects Octopus Deploy versions prior to 2019.10.7 and represents a critical security flaw in the handling of cross-site request forgery protection mechanisms. This issue specifically manifests when SSL offloading is configured within the deployment environment, creating a dangerous condition where sensitive security cookies are transmitted without proper security attributes that would normally protect them from interception and manipulation.
The technical flaw resides in the improper implementation of the CSRF cookie security attributes within the Octopus Deploy application framework. When SSL offloading is enabled, the system should ensure that all security-critical cookies include the secure attribute to prevent them from being transmitted over unencrypted connections. However, in affected versions, the CSRF protection cookie was sometimes sent without this crucial secure flag, making it vulnerable to man-in-the-middle attacks and session hijacking attempts. This vulnerability directly contravenes established security best practices and industry standards for cookie security management.
The operational impact of this vulnerability is significant as it undermines the fundamental security controls designed to protect against cross-site request forgery attacks. Attackers who can intercept network traffic between clients and the Octopus Deploy server could potentially capture the CSRF cookie and use it to perform unauthorized actions on behalf of legitimate users. This risk is particularly severe in environments where SSL offloading is implemented, as it creates multiple attack vectors where the cookie could be exposed to network-based threats. The vulnerability essentially weakens the authentication and authorization mechanisms that protect deployment operations and system integrity.
Organizations using affected versions of Octopus Deploy should immediately implement the available patches that were released as part of the 2019.10.7 update, with backported fixes available for LTS versions 2019.6.14 and 2019.9.8. The mitigation strategy should also include verifying that all SSL offloading configurations properly enforce the secure attribute on all security cookies. Network security monitoring should be enhanced to detect potential cookie interception attempts, and administrators should review their deployment configurations to ensure proper implementation of secure cookie attributes. This vulnerability aligns with CWE-315 which addresses the improper handling of sensitive data in cookies and relates to ATT&CK technique T1566 which covers credential access through network sniffing and man-in-the-middle attacks. Organizations should also consider implementing additional security controls such as HTTP Strict Transport Security headers and regular security assessments to prevent similar issues in other components of their deployment infrastructure.