CVE Vulnerability

CVE-2018-6594

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/TElgamal/attack-on-pycrypto-elgamal Third Party Advisory
https://github.com/dlitz/pycrypto/issues/253 Exploit Issue Tracking
https://lists.debian.org/debian-lts-announce/2018/02/msg00018.html Mailing List Third Party Advisory
https://usn.ubuntu.com/3616-1/ Third Party Advisory
https://usn.ubuntu.com/3616-2/ Third Party Advisory
https://security.gentoo.org/glsa/202007-62
Configurations

Configuration 1

cpe:2.3:a:dlitz:pycrypto:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
Information

Published : 2018-02-03 03:29

Updated : 2020-07-31 07:15

NVD link : CVE-2018-6594

Mitre link : CVE-2018-6594

Products Affected
No products.
CWE
CWE-326

Inadequate Encryption Strength