CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 0CVE-2021-24115
https://notcve.org/view.php?id=CVE-2021-24115
In Botan before 2.17.3, constant-time computations are not used for certain decoding and encoding operations (base32, base58, base64, and hex). En Botan versiones anteriores a 2.17.3, los cálculos de tiempo constante no son usados para determinadas operaciones de decodificación y codificación (base32, base58, base64 y hex) • https://botan.randombit.net/news.html https://github.com/randombit/botan/compare/2.17.2...2.17.3 https://github.com/randombit/botan/pull/2549 •
CVSS: 5.9EPSS: 0%CPEs: 1EXPL: 0CVE-2018-20187
https://notcve.org/view.php?id=CVE-2018-20187
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 of the secret. This issue affects only key generation, not ECDSA signatures or ECDH key agreement. Se ha detectado un fallo de canal lateral en Botan en versiones anteriores a la 2.9.0. Un atacante que sea capaz de medir con precisión el tiempo que tarda en generarse una clave ECC podría ser capaz de obtener información sobre el alto número de bits de la clave secreta, ya que la función para obtener el punto público del escalar secreto emplea una "escalera de Montgomery", cuya iteración de bucles depende de la longitud de bits del secreto. • https://botan.randombit.net/news.html https://botan.randombit.net/security.html https://github.com/crocs-muni/ECTester • CWE-320: Key Management Errors •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2018-9860
https://notcve.org/view.php?id=CVE-2018-9860
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. • https://botan.randombit.net/security.html https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7434 • CWE-193: Off-by-one Error •
CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 0CVE-2018-9127
https://notcve.org/view.php?id=CVE-2018-9127
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 domain. For example, b*.example.com would match some hostnames that do not begin with a 'b' character. Botan 2.2.0 - 2.4.0 (solucionado en 2.5.0) gestionaba de manera incorrecta certificados wildcard y podría aceptar determinados certificados como válidos para nombres de hosts cuando, bajo las reglas RFC 6125, no deberían coincidir. Esto solo afecta a certificados emitidos al mismo dominio que el host, por lo que para suplantar un host el certificado wildcard tiene que coincidir con otros hosts en el mismo dominio. • https://botan.randombit.net/security.html • CWE-295: Improper Certificate Validation •
CVSS: 5.5EPSS: 0%CPEs: 37EXPL: 0CVE-2017-14737
https://notcve.org/view.php?id=CVE-2017-14737
A cryptographic cache-based side channel in the RSA implementation in Botan before 1.10.17, and 1.11.x and 2.x before 2.3.0, allows a local attacker to recover information about RSA secret keys, as demonstrated by CacheD. This occurs because an array is indexed with bits derived from a secret key. Un canal lateral criptográfico basado en caché en la implementación RSA en Botan en versiones anteriores a la 1.10.17 y las versiones 1.11.x y 2.x anteriores a la 2.3.0 permite que un atacante local recupere información sobre las claves secretas RSA, tal y como demuestra CacheD. Esto ocurre porque un array se indexa con bits derivados de una clave secreta. • https://github.com/randombit/botan/issues/1222 https://lists.debian.org/debian-lts-announce/2021/11/msg00006.html https://www.usenix.org/conference/usenixsecurity17/technical-sessions/presentation/wang-shuai •