CVE-2022-35920: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

August 1, 2022 (updated August 10, 2022)

Sanic is an opensource python web server/framework. Affected versions of sanic allow access to lateral directories when using app.static if using encoded %2F URLs. Parent directory traversal is not impacted. Users are advised to upgrade. There is no known workaround for this issue.

References

github.com/advisories/GHSA-8cw9-5hmv-77w6
github.com/sanic-org/sanic/issues/2478
github.com/sanic-org/sanic/pull/2495
github.com/sanic-org/sanic/security/advisories/GHSA-8cw9-5hmv-77w6
nvd.nist.gov/vuln/detail/CVE-2022-35920

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