A vulnerability, which was classified as problematic, has been found in GoCD up to 19.10.0. This issue affects some unknown processing of the component API. The manipulation with an unknown input leads to a timing discrepancy vulnerability. Using CWE to declare the problem leads to CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. Impacted is confidentiality. The summary by CVE is:

GoCD is a continuous delivery server. GoCD helps you automate and streamline the build-test-release cycle for continuous delivery of your product. GoCD versions from 19.2.0 to 19.10.0 (inclusive) are subject to a timing attack in validation of access tokens due to use of regular string comparison for validation of the token rather than a constant time algorithm. This could allow a brute force attack on GoCD server API calls to observe timing differences in validations in order to guess an access token generated by a user for API access. This issue is fixed in GoCD version 19.11.0. As a workaround, users can apply rate limiting or insert random delays to API calls made to GoCD Server via a reverse proxy or other fronting web server. Another workaround, users may disallow use of access tokens by users by having an administrator revoke all access tokens through the "Access Token Management" admin function.

The weakness was released 10/14/2022 as GHSA-999p-fp84-jcpq. The advisory is shared at github.com. The identification of this vulnerability is CVE-2022-39308 since 09/02/2022. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 19.11.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 236d4baf92e6607f2841c151c855adcc477238b8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Productinfo

Name

• GoCD

Version

• 19.0
• 19.1
• 19.2
• 19.3
• 19.4
• 19.5
• 19.6
• 19.7
• 19.8
• 19.9
• 19.10

License

• open-source

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