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Botan is a C++ cryptography library. Prior to 3.13.0, Botan's online OCSP client allowed a single HTTP redirect while posting an OCSP request to the URI in a certificate's Authority Information Access extension. A malicious OCSP responder or an on-path attacker could redirect the client to make one blind request to an otherwise unreachable internal HTTP service. The primary impact is blind SSRF that might affect internal services with non-idempotent GET handlers, and response timing can provide a coarse internal-service oracle. This issue is fixed in version 3.13.0.

• https://github.com/randombit/botan/security/advisories/GHSA-9qgq-q9j4-4f82 x_refsource_CONFIRM
• https://github.com/randombit/botan/pull/5815 x_refsource_MISC
• https://github.com/randombit/botan/commit/9791ca39a556c76186b1fc943c7d8d460712d58f x_refsource_MISC