CVE-2026-118373LibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host()

Beschreibung

LibreSSL ocspcheck through 4.4.0 contains a cleartext transmission vulnerability because url2host() discards the OCSP URL scheme and http_alloc() only selects TLS for port 443. On-path network attackers can read OCSP requests sent to https responder URLs on non-443 ports, exposing certificate serial numbers, issuer hashes, and nonces.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://github.com/openbsd/src/commit/0f7039667044d1cd252cc72134e499186da4da25 patch
• https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L299 technical-description
• LibreSSL 4.4.0 Release Notes release-notes
• https://github.com/libressl/portable product
• VulnCheck Advisory: LibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host() third-party-advisory