Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS02eHY1LTg2cTktN3hyOM4AA1v8

SecureJoin: on windows, paths outside of the rootfs could be inadvertently produced

Impact

For Windows users of github.com/cyphar/filepath-securejoin, until v0.2.4 it was possible for certain rootfs and path combinations (in particular, where a malicious Unix-style /-separated unsafe path was used with a Windows-style rootfs path) to result in generated paths that were outside of the provided rootfs.

It is unclear to what extent this has a practical impact on real users, but given the possible severity of the issue we have released an emergency patch release that resolves this issue.

Thanks to @pjbgf for discovering, debugging, and fixing this issue (as well as writing some tests for it).

Patches

c121231e1276e11049547bee5ce68d5a2cfe2d9b is the patch fixing this issue. v0.2.4 contains the fix.

Workarounds

Users could use filepath.FromSlash() on all unsafe paths before passing them to filepath-securejoin.

References

See #9.

Permalink: https://github.com/advisories/GHSA-6xv5-86q9-7xr8
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS02eHY1LTg2cTktN3hyOM4AA1v8
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 8 months ago
Updated: 8 months ago

Identifiers: GHSA-6xv5-86q9-7xr8
References:

• https://github.com/cyphar/filepath-securejoin/security/advisories/GHSA-6xv5-86q9-7xr8
• https://github.com/cyphar/filepath-securejoin/pull/9
• https://github.com/cyphar/filepath-securejoin/commit/c121231e1276e11049547bee5ce68d5a2cfe2d9b
• https://github.com/cyphar/filepath-securejoin/releases/tag/v0.2.4
• https://github.com/advisories/GHSA-6xv5-86q9-7xr8

Repository: https://github.com/cyphar/filepath-securejoin
Blast Radius: 0.0

Affected Packages