| Bug ID | 1196430 |
|---|---|
| Summary | VUL-0: CVE-2022-21656: envoy-proxy: X.509 subjectAltName matching (and nameConstraints) bypass |
| Classification | openSUSE |
| Product | openSUSE Distribution |
| Version | Leap 15.3 |
| Hardware | Other |
| URL | https://smash.suse.de/issue/324527/ |
| OS | Other |
| Status | NEW |
| Severity | Major |
| Priority | P5 - None |
| Component | Security |
| Assignee | dmueller@suse.com |
| Reporter | carlos.lopez@suse.com |
| QA Contact | security-team@suse.de |
| Found By | Security Response Team |
| Blocker | --- |
rh#2057271 Envoy is an open source edge and service proxy, designed for cloud-native applications. The default_validator.cc implementation used to implement the default certificate validation routines has a "type confusion" bug when processing subjectAltNames. This processing allows, for example, an rfc822Name or uniformResourceIndicator to be authenticated as a domain name. This confusion allows for the bypassing of nameConstraints, as processed by the underlying OpenSSL/BoringSSL implementation, exposing the possibility of impersonation of arbitrary servers. As a result Envoy will trust upstream certificates that should not be trusted. References: https://bugzilla.redhat.com/show_bug.cgi?id=2057271 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-21656 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21656 https://github.com/envoyproxy/envoy/commit/bb95af848c939cfe5b5ee33c5b1770558077e64e https://github.com/envoyproxy/envoy/security/advisories/GHSA-c9g7-xwcv-pjx2 http://www.cvedetails.com/cve/CVE-2022-21656/