The activation process in Travis CI, for certain 2021-09-03 through 2021-09-10 builds, causes secret data to have unexpected sharing that is not specified by the customer-controlled .travis.yml file. In particular, the desired behavior (if .travis.yml has been created locally by a customer, and added to git) is for a Travis service to perform builds in a way that prevents public access to customer-specific secret environment data such as signing keys, access credentials, and API tokens. However, during the stated 8-day interval, secret data could be revealed to an unauthorized actor who forked a public repository and printed files during a build process.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-41077
• https://blog.travis-ci.com/2021-09-13-bulletin
• https://news.ycombinator.com/item?id=28523350
• https://news.ycombinator.com/item?id=28524727
• https://travis-ci.community/t/security-bulletin/12081
• https://twitter.com/peter_szilagyi/status/1437646118700175360
• https://twitter.com/peter_szilagyi/status/1437649838477283330