PT-2021-8576 · Github.Com/Gorilla/Handlers+13 · Github.Com/Gorilla/Handlers+3

Evan J Johnson · CVE-2017-20146 · Published 2021-04-14 · Updated 2025-04-11

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions No specific software or versions are mentioned in the provided descriptions.

Description The issue concerns the usage of the CORS handler, which may apply improper CORS headers. This allows the requester to explicitly control the value of the Access-Control-Allow-Origin header, bypassing the expected behavior of the Same Origin Policy. No information is provided about the estimated number of potentially affected devices or real-world incidents where this issue was exploited.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Origin Validation Error

Weakness Enumeration

CWE-346

Related Identifiers

CVE-2017-20146

GHSA-JCR6-MMJJ-PCHW

GO-2020-0020

Affected Products

Github.Com/Gorilla/Handlers

Golang-Github-Coreos-Discovery-Etcd-Io

Golang-Github-Gorilla-Handlers

Handlers

References · 16

• https://github.com/gorilla/handlers/pull/116 · Patch
• https://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145 · Patch
• https://osv.dev/vulnerability/GHSA-jcr6-mmjj-pchw · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-20146 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-20146 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-20146 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-20146 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-20146 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-20146 · Security Note
• https://osv.dev/vulnerability/GO-2020-0020 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-20146 · Vendor Advisory
• https://github.com/gorilla/handlers · Note
• https://pkg.go.dev/vuln/GO-2020-0020 · Note
• https://t.me/cvenotify/40866 · Telegram Post
• https://t.me/cvenotify/118960 · Telegram Post