Description
PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN was still accepted when its CN matched the requested peer_name. A certificate trusted by the client for one name can therefore be used to impersonate another.
Mitigation
Minimal update. May introduce new vulnerabilities or breaking changes.
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 debian 12 | | =8.2.10-1 || =8.2.10-2 || =8.2.12-1 || =8.2.16-1 || =8.2.16-2 || =8.2.17-1 || =8.2.18-1 || =8.2.18-1~deb12u1 || =8.2.20-1~deb12u1 || =8.2.20-2 || =8.2.20-3 || =8.2.21-1 || =8.2.23-1 || =8.2.24-1 || =8.2.24-1~deb12u1 || =8.2.26-1~deb12u1 || =8.2.26-4 || =8.2.27-1 || =8.2.28-1~deb12u1 || =8.2.29-1~deb12u1 || =8.2.30-1~deb12u1 || =8.2.31-1~deb12u1 || =8.2.32-1~deb12u1 || =8.2.33-1~deb12u1 || =8.2.5-2 || =8.2.7-1 || =8.2.7-1.1 || =8.2.7-1.2 || =8.2.7-1~deb12u1 || >=0 <8.2.34-1~deb12u1 | 8.2.34-1~deb12u1 |
debian 13 | | =8.4.11-1 || =8.4.16-1 || =8.4.16-1~deb13u1 || =8.4.20-1 || =8.4.21-1 || =8.4.21-1~deb13u1 || =8.4.22-1 || =8.4.23-1 || =8.4.23-1~deb13u1 || =8.4.24-1 || =8.4.24-1~deb13u1 || >=0 <8.4.26-1~deb13u1 | 8.4.26-1~deb13u1 |
debian 14 | | =8.4.11-1 || =8.4.16-1 || =8.4.16-1~deb13u1 || =8.4.20-1 || =8.4.21-1 || =8.4.21-1~deb13u1 || =8.4.22-1 || =8.4.23-1 || =8.4.23-1~deb13u1 || =8.4.24-1 || =8.4.24-1~deb13u1 || =8.4.26-1~deb13u1 || >=0 <8.4.26-1 | 8.4.26-1 |
 rpm rhel10 | | - | - |
rpm rhel6 | | - | - |
rpm rhel7 | | - | - |
rpm rhel8 | | <0:7.4.33-8.module+el8.10.0+25117+30337cca | 0:7.4.33-8.module+el8.10.0+25117+30337cca |
rpm rhel9 | | - | - |
rpm rhel10 | | - | - |
