A command injection vulnerability was discovered in Gitlab runner versions prior to 13.2.4, 13.3.2 and 13.4.1. When the runner is configured on a Windows system with a docker executor, which allows the attacker to run arbitrary commands on Windows host, via DOCKER_AUTH_CONFIG build variable.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
Link | Tags |
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https://gitlab.com/gitlab-org/gitlab-runner/-/issues/26725 | vendor advisory broken link |
https://hackerone.com/reports/955016 | third party advisory permissions required |
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13347.json | vendor advisory |