GHSA-56qc-c576-qq46MediumCVSS 3.7
LibreSSL ocspcheck through 4.4.0 contains a cleartext transmission vulnerability because url2host...
🔗 CVE IDs covered (1)
📋 Description
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.
🔗 References (7)
- https://nvd.nist.gov/vuln/detail/CVE-2026-118373
- https://github.com/openbsd/src/commit/0f7039667044d1cd252cc72134e499186da4da25
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txt
- https://github.com/libressl/portable
- https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L299
- https://www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-cleartext-transmission-of-ocsp-requests-via-url2host
- https://github.com/advisories/GHSA-56qc-c576-qq46