An issue was discovered in Botan 1.11.32 through 2.x before 2.6.0. An off-by-one error when processing malformed TLS-CBC ciphertext could cause the receiving side to include in the HMAC computation exactly 64K bytes of data following the record buffer, aka an over-read. The MAC comparison will subsequently fail and the connection will be closed. This could be used for denial of service. No information leak occurs.
{ "binaries": [ { "binary_version": "2.4.0-5ubuntu1", "binary_name": "botan" }, { "binary_version": "2.4.0-5ubuntu1", "binary_name": "libbotan-2-4" }, { "binary_version": "2.4.0-5ubuntu1", "binary_name": "libbotan-2-dev" }, { "binary_version": "2.4.0-5ubuntu1", "binary_name": "python3-botan" } ] }