Botan is a C++ cryptography library. Prior to version 3.11.1, the TLS 1.3 implementation allowed ApplicationData records to be processed prior to the Finished message being received. A server which is attempting to enforce client authentication via certificates can by bypassed by a client which entirely omits Certificate, CertificateVerify, and the Finished message and instead sends application data records. This vulnerability is fixed in 3.11.1.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XBotan Project Botan
APPBotan Project3.0.0 – 3.11.0
Related vulnerabilities
Botan: błędna weryfikacja certyfikatu umożliwia obejście łańcucha zaufania
In Botan before 2.19.3, it is possible to forge OCSP responses due to a certificate verification error. This i...
In Botan before 2.17.3, constant-time computations are not used for certain decoding and encoding operations (...
Botan 2.2.0 - 2.4.0 (fixed in 2.5.0) improperly handled wildcard certificates and could accept certain certifi...
The Curve25519 code in botan before 1.11.31, on systems without a native 128-bit integer type, might allow att...