Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTY1Mjgtd3ZmNi1mNnFn

Pycrypto generates weak key parameters

lib/Crypto/PublicKey/ElGamal.py in PyCrypto through 2.6.1 generates weak ElGamal key parameters, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for PyCrypto's ElGamal implementation.

Permalink: https://github.com/advisories/GHSA-6528-wvf6-f6qg
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTY1Mjgtd3ZmNi1mNnFn
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: almost 6 years ago
Updated: over 1 year ago

CVSS Score: 7.5
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Identifiers: GHSA-6528-wvf6-f6qg, CVE-2018-6594
References:

• https://nvd.nist.gov/vuln/detail/CVE-2018-6594
• https://github.com/dlitz/pycrypto/issues/253
• https://github.com/TElgamal/attack-on-pycrypto-elgamal
• https://github.com/advisories/GHSA-6528-wvf6-f6qg
• https://lists.debian.org/debian-lts-announce/2018/02/msg00018.html
• https://security.gentoo.org/glsa/202007-62
• https://usn.ubuntu.com/3616-1/
• https://usn.ubuntu.com/3616-2/

Repository: https://github.com/dlitz/pycrypto
Blast Radius: 33.6

Affected Packages