PT-2020-18329 · Oauth2 Proxy · Oauth2 Proxy

Starkers · Published 2020-01-30 · Updated 2024-03-06 · CVE-2020-5233

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions oauth2 proxy versions prior to 5.0

Description An open redirect vulnerability has been found in oauth2 proxy. This issue could allow an attacker to silently harvest authentication tokens. For example, an attacker could use a URL like https://facebook.com/oauth.php?clientid=123&state=abc&redirect url=https://yourdomain.com/red.php?url%3dhttps://attacker.com/ to exploit this vulnerability. The IsValidRedirect function in oauth2 proxy is vulnerable, and a patch has been submitted to fix this issue.

Recommendations For versions prior to 5.0, update to version 5.0 to resolve the issue. At the moment, there is no workaround available for this vulnerability.

Exploit

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

BIT-OAUTH2-PROXY-2020-5233

CVE-2020-5233

GHSA-QQXW-M5FJ-F7GV

Affected Products

Oauth2 Proxy

References · 12

• 🔥 https://github.com/pusher/oauth2_proxy/security/advisories/GHSA-qqxw-m5fj-f7gv · Exploit
• https://github.com/pusher/oauth2_proxy/commit/a316f8a06f3c0ca2b5fc5fa18a91781b313607b2 · Patch
• https://osv.dev/vulnerability/CVE-2020-5233 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-5233 · Security Note
• https://osv.dev/vulnerability/BIT-oauth2-proxy-2020-5233 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-qqxw-m5fj-f7gv · Vendor Advisory
• https://github.com/pusher/oauth2_proxy/releases/tag/v5.0.0 · Note
• https://github.com/oauth2-proxy/oauth2_proxy/commit/a316f8a06f3c0ca2b5fc5fa18a91781b313607b2 · Note
• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-qqxw-m5fj-f7gv · Note
• https://github.com/oauth2-proxy/oauth2_proxy/releases/tag/v5.0.0 · Note
• https://blog.detectify.com/2019/05/16/the-real-impact-of-an-open-redirect · Note
• https://t.me/cvenotify/671 · Telegram Post