CVE-2022-31100: Reachable Assertion in rulex

June 21, 2022 (updated June 29, 2022)

When parsing untrusted rulex expressions, rulex may crash, possibly enabling a Denial of Service attack. This happens when the expression contains a multi-byte UTF-8 code point in a string literal or after a backslash, because rulex tries to slice into the code point and panics as a result.

This is a security concern for you, if

your service parses untrusted rulex expressions (expressions provided by an untrusted user), and
your service becomes unavailable when the thread running rulex panics.

References

github.com/advisories/GHSA-8v9w-p43c-r885
github.com/rulex-rs/rulex
github.com/rulex-rs/rulex/commit/fac6d58b25c6f9f8c0a6cdc4dec75b37b219f1d6
github.com/rulex-rs/rulex/security/advisories/GHSA-8v9w-p43c-r885
nvd.nist.gov/vuln/detail/CVE-2022-31100
rustsec.org/advisories/RUSTSEC-2022-0031.html

Code Behaviors & Features

Detect and mitigate CVE-2022-31100 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →