CVSS: 7.5EPSS: 0%CPEs: 6EXPL: 1CVE-2020-25658 – python-rsa: bleichenbacher timing oracle attack against RSA decryption
https://notcve.org/view.php?id=CVE-2020-25658
It was found that python-rsa is vulnerable to Bleichenbacher timing attacks. An attacker can use this flaw via the RSA decryption API to decrypt parts of the cipher text encrypted with RSA. Se detectó que python-rsa es vulnerable a los ataques de sincronización de tipo Bleichenbacher. Un atacante puede utilizar este fallo por medio de la API de descifrado RSA para descifrar partes del texto cifrado con RSA A flaw was found in python-rsa, where it is vulnerable to Bleichenbacher timing attacks. This flaw allows an attacker, via the RSA decryption API, to decrypt parts of the ciphertext encrypted with RSA. • https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25658 https://github.com/sybrenstuvel/python-rsa/issues/165 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SAF67KDGSOHLVFTRDOHNEAFDRSSYIWA https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APF364QJ2IYLPDNVFBOEJ24QP2WLVLJP https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QY4PJWTYSOV7ZEYZVMYIF6XRU73CY6O7 https://access.redhat.com/security/cve/CVE-2020-25 • CWE-327: Use of a Broken or Risky Cryptographic Algorithm CWE-385: Covert Timing Channel •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 1CVE-2020-13757 – python-rsa: decryption of ciphertext leads to DoS
https://notcve.org/view.php?id=CVE-2020-13757
Python-RSA before 4.1 ignores leading '\0' bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation). Python-RSA versión 4.1, ignora bytes '\0' principales durante la desencriptación del texto cifrado. Esto podría tener un impacto relevante para la seguridad, por ejemplo, al ayudar a un atacante a inferir que una aplicación utiliza Python-RSA, o si la longitud del texto cifrado aceptado afecta al comportamiento de la aplicación (por ejemplo, al causar una asignación excesiva de memoria) A flaw was found in the python-rsa package, where it does not explicitly check the ciphertext length against the key size and ignores the leading 0 bytes during the decryption of the ciphertext. This flaw allows an attacker to perform a ciphertext attack, leading to a denial of service. • https://github.com/sybrenstuvel/python-rsa/issues/146 https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KILTHBHNSDUCYV22ODLOKTICJJ7JQIQ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZYB65VNILRBTXL6EITQTH2PZPK7I23MW https://usn.ubuntu.com/4478-1 https://access.redhat.com/security/cve/CVE-2020-13757 https://bugzilla.redhat.com/show_bug.cgi?id=1848507 • CWE-327: Use of a Broken or Risky Cryptographic Algorithm •