Openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- openshift4/ose-oauth-proxy
Version range not reported
- openshift4/ose-oauth-proxy
Version range not reported
- openshift4/ose-oauth-proxy
Version range not reported
- openshift4/ose-oauth-proxy-rhel9
Version range not reported
- openshift4/ose-oauth-proxy-rhel9
Version range not reported
- openshift4/ose-oauth-proxy-rhel9
Version range not reported
- openshift4/ose-oauth-proxy-rhel9
Version range not reported
- openshift4/ose-oauth-proxy-rhel9
Version range not reported
- openshift4/ose-oauth-proxy-rhel9
Version range not reported
- openshift4/ose-oauth-proxy-rhel9
Version range not reported
- openshift4/ose-oauth-proxy-rhel9
Version range not reported