Debian Botan vulnerabilities

CVE-2026-32877 [HIGH] CVE-2026-32877: botan - Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0... Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value (C3) failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read of up to 31 bytes, resulting in a crash or potentially other undefined b

CVE-2026-34582 [HIGH] CVE-2026-34582: botan - Botan is a C++ cryptography library. Prior to version 3.11.1, the TLS 1.3 implem... 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 an

CVE-2026-32884 [MEDIUM] CVE-2026-32884: botan - Botan is a C++ cryptography library. Prior to version 3.11.0, during processing ... Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is technically not requ

CVE-2026-32883 [MEDIUM] CVE-2026-32883: botan - Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0... Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path validation, OCSP responses were checked for an appropriate status code, but critically omitted verifying the signature of the OCSP response itself. This issue has been patched in version 3.11.0. Scope: local bookworm: resolved bullseye: resolved trixie: resolved

CVE-2024-34703 [HIGH] CVE-2024-34703: botan - Botan is a C++ cryptography library. X.509 certificates can identify elliptic cu... Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. Prior to versions 3.3.0 and 2.19.4, an attacker could present an ECDSA X.509 certificate using explicit encoding where the parameters are very large. The proof of concept used a 16Kbit prime for this purpo

CVE-2024-50383 [MEDIUM] CVE-2024-50383: botan - Botan before 3.6.0, when certain GCC versions are used, has a compiler-induced s... Botan before 3.6.0, when certain GCC versions are used, has a compiler-induced secret-dependent operation in lib/utils/donna128.h in donna128 (used in Chacha-Poly1305 and x25519). An addition can be skipped if a carry is not set. This was observed for GCC 11.3.0 with -O2 on MIPS, and GCC on x86-i386. (Only 32-bit processors can be affected.) Scope: local bookworm: r

CVE-2024-34702 [MEDIUM] CVE-2024-34702: botan - Botan is a C++ cryptography library. X.509 certificates can identify elliptic cu... Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. Prior to 3.5.0 and 2.19.5, checking name constraints in X.509 certificates is quadratic in the number of names and name constraints. An attacker who presented a certificate chain which contained a very l

CVE-2024-39312 [MEDIUM] CVE-2024-39312: botan - Botan is a C++ cryptography library. X.509 certificates can identify elliptic cu... Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. A bug in the parsing of name constraint extensions in X.509 certificates meant that if the extension included both permitted subtrees and excluded subtrees, only the permitted subtree would be checked. I

CVE-2024-50382 [MEDIUM] CVE-2024-50382: botan - Botan before 3.6.0, when certain LLVM versions are used, has compiler-induced se... Botan before 3.6.0, when certain LLVM versions are used, has compiler-induced secret-dependent control flow in lib/utils/ghash/ghash.cpp in GHASH in AES-GCM. There is a branch instead of an XOR with carry. This was observed for Clang in LLVM 15 on RISC-V. Scope: local bookworm: resolved (fixed in 2.19.3+dfsg-1+deb12u1) bullseye: open trixie: resolved (fixed in 2.19.

CVE-2022-43705 [CRITICAL] CVE-2022-43705: botan - In Botan before 2.19.3, it is possible to forge OCSP responses due to a certific... In Botan before 2.19.3, it is possible to forge OCSP responses due to a certificate verification error. This issue was introduced in Botan 1.11.34 (November 2016). Scope: local bookworm: resolved (fixed in 2.19.3+dfsg-1) bullseye: open trixie: resolved (fixed in 2.19.3+dfsg-1)

CVE-2021-24115 [CRITICAL] CVE-2021-24115: botan - In Botan before 2.17.3, constant-time computations are not used for certain deco... In Botan before 2.17.3, constant-time computations are not used for certain decoding and encoding operations (base32, base58, base64, and hex). Scope: local bookworm: resolved (fixed in 2.17.3+dfsg-1) bullseye: resolved (fixed in 2.17.3+dfsg-1) trixie: resolved (fixed in 2.17.3+dfsg-1)

CVE-2021-40529 [MEDIUM] CVE-2021-40529: botan - The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and o... The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and other products, allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead t

CVE-2018-9127 [CRITICAL] CVE-2018-9127: botan - Botan 2.2.0 - 2.4.0 (fixed in 2.5.0) improperly handled wildcard certificates an... Botan 2.2.0 - 2.4.0 (fixed in 2.5.0) improperly handled wildcard certificates and could accept certain certificates as valid for hostnames when, under RFC 6125 rules, they should not match. This only affects certificates issued to the same domain as the host, so to impersonate a host one must already have a wildcard certificate matching other hosts in the same domai

CVE-2018-9860 [HIGH] CVE-2018-9860: botan - An issue was discovered in Botan 1.11.32 through 2.x before 2.6.0. An off-by-one... 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 d

CVE-2018-20187 [MEDIUM] CVE-2018-20187: botan - A side-channel issue was discovered in Botan before 2.9.0. An attacker capable o... A side-channel issue was discovered in Botan before 2.9.0. An attacker capable of precisely measuring the time taken for ECC key generation may be able to derive information about the high bits of the secret key, as the function to derive the public point from the secret scalar uses an unblinded Montgomery ladder whose loop iteration count depends on the bitlength o

CVE-2018-12435 [MEDIUM] CVE-2018-12435: botan - Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack... Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP, related to dsa/dsa.cpp, ec_group/ec_group.cpp, and ecdsa/ecdsa.cpp. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host. Scope: