Travis CI Flaw Exposes Secrets and techniques of Hundreds of Open Supply Initiatives


Travis CI

Steady integration vendor Travis CI has patched a severe safety flaw that uncovered API keys, entry tokens, and credentials, probably placing organizations that use public supply code repositories susceptible to additional assaults.

The problem — tracked as CVE-2021-41077 — considerations unauthorized entry and plunder of secret surroundings knowledge related to a public open-source challenge through the software program construct course of. The issue is alleged to have lasted throughout an eight-day window between September 3 and September 10.

Felix Lange of Ethereum has been credited with discovering the leakage on September 7, with the corporate’s Péter Szilágyi pointing out that “anybody might exfiltrate these and achieve lateral motion into 1000s of [organizations].”

Travis CI is a hosted CI/CD (quick for steady integration and steady deployment) answer used to construct and check software program initiatives hosted on supply code repository methods like GitHub and Bitbucket.

“The specified habits (if .travis.yml has been created domestically by a buyer, and added to git) is for a Travis service to carry out builds in a approach that forestalls public entry to customer-specific secret surroundings knowledge similar to signing keys, entry credentials, and API tokens,” the vulnerability description reads. “Nonetheless, through the said 8-day interval, secret knowledge may very well be revealed to an unauthorized actor who forked a public repository and printed recordsdata throughout a construct course of.”

In different phrases, a public repository forked from one other one might file a pull request that might receive secret environmental variables set within the authentic upstream repository. Travis CI, in its personal documentation, notes that “Encrypted surroundings variables aren’t out there to tug requests from forks as a result of safety danger of exposing such data to unknown code.”

It has additionally acknowledged the chance of publicity stemming from an exterior pull request: “A pull request despatched from a fork of the upstream repository may very well be manipulated to reveal surroundings variables. The upstream repository’s maintainer would haven’t any safety in opposition to this assault, as pull requests might be despatched by anybody who forks the repository on GitHub.”

Szilágyi additionally referred to as out Travis CI for downplaying the incident and failing to confess the “gravity” of the problem, whereas additionally urging GitHub to ban the corporate over its poor safety posture and vulnerability disclosure processes. “After three days of strain from a number of initiatives, [Travis CI] silently patched the problem on the tenth,” Szilágyi tweeted. “No evaluation, no safety report, no put up mortem, not warning any of their customers that their secrets and techniques may need been stolen.”

The Berlin-based DevOps platform firm on September 13 printed a terse “security bulletin,” advising customers to rotate their keys regularly, and adopted it up with a second notice on its neighborhood boards stating that it has no discovered no proof the bug was exploited by malicious events.

“Because of the extraordinarily irresponsible approach [Travis CI] dealt with this case, and their subsequent refusal to warn their customers about probably leaked secrets and techniques, we will solely suggest everybody to right away and indefinitely switch away from Travis,” Szilágyi added.


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