UBUNTU-CVE-2026-118768

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UBUNTU-CVE-2026-118768

Summary:

Details: Botan is a C++ cryptography library. From 1.11.34 until 3.13.0, the botan ocsp_check command requested an OCSP response from a certificate's Authority Information Access URL without verifying the response signature or authorizing the signer. A malicious responder or on-path attacker could return a matching and timely GOOD response with an empty, invalid, or unauthorized signature, causing a revoked certificate to produce exit status 0 and OCSP check OK output. Only the command-line interface is affected. This issue is fixed in version 3.13.0.

References: https://ubuntu.com/security/CVE-2026-118768, https://www.cve.org/CVERecord?id=CVE-2026-118768, https://github.com/randombit/botan/commit/46b2a9ca59b0797184fbf7537495bda6e61a1983, https://github.com/randombit/botan/pull/5825, https://github.com/randombit/botan/security/advisories/GHSA-mpr7-9494-4qcw