Description
In codecov (npm package) before version 3.7.1 the upload method has a command injection vulnerability. Clients of the codecov-node library are unlikely to be aware of this, so they might unwittingly write code that contains a vulnerability. A similar CVE (CVE-2020-7597 for GHSA-5q88-cjfq-g2mh) was issued but the fix was incomplete. It only blocked &, and command injection is still possible using backticks instead to bypass the sanitizer. The attack surface is low in this case. Particularly in the standard use of codecov, where the module is used directly in a build pipeline, not built against as a library in another application that may supply malicious input and perform command injection.
Remediation
References
https://github.com/codecov/codecov-node/commit/c0711c656686e902af2cd92d6aecc8074de4d83d
https://lgtm.com/query/7714424068617023832
https://github.com/codecov/codecov-node/pull/180
https://github.com/advisories/GHSA-5q88-cjfq-g2mh
https://github.com/codecov/codecov-node/security/advisories/GHSA-xp63-6vf5-xf3v
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