Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS12ODRoLTY1M3YtNHBxOc4AA7vR

Some CORS middleware allow untrusted origins

Impact

Some CORS middleware (more specifically those created by specifying two or more origin patterns whose hosts share a proper suffix) incorrectly allow some untrusted origins, thereby opening the door to cross-origin attacks from the untrusted origins in question.

For example, specifying origin patterns https://foo.com and https://bar.com (in that order) would yield a middleware that would incorrectly allow untrusted origin https://barfoo.com.

Patches

Patched in v0.9.0.

Workarounds

None.

Permalink: https://github.com/advisories/GHSA-v84h-653v-4pq9
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS12ODRoLTY1M3YtNHBxOc4AA7vR
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: 15 days ago
Updated: 15 days ago

CVSS Score: 9.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Identifiers: GHSA-v84h-653v-4pq9
References:

• https://github.com/jub0bs/fcors/security/advisories/GHSA-v84h-653v-4pq9
• https://github.com/jub0bs/fcors/commit/08d85c149a418a583315cee066d4a35cc817219d
• https://github.com/advisories/GHSA-v84h-653v-4pq9

Repository: https://github.com/jub0bs/fcors
Blast Radius: 0.0

Affected Packages