Vulnerability Details : CVE-2018-6594
Potential exploit
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.
Products affected by CVE-2018-6594
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- 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:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
- cpe:2.3:a:dlitz:pycrypto:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-6594
0.64%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 68 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-6594
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2018-6594
-
The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-6594
-
https://lists.debian.org/debian-lts-announce/2018/02/msg00018.html
[SECURITY] [DLA 1283-1] python-crypto security updateMailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/202007-62
PyCrypto: Weak key generation (GLSA 202007-62) — Gentoo security
-
https://usn.ubuntu.com/3616-2/
USN-3616-2: Python Crypto vulnerability | Ubuntu security noticesThird Party Advisory
-
https://usn.ubuntu.com/3616-1/
USN-3616-1: Python Crypto vulnerability | Ubuntu security noticesThird Party Advisory
-
https://github.com/TElgamal/attack-on-pycrypto-elgamal
GitHub - TElgamal/attack-on-pycrypto-elgamal: Attack on the ElGamal Implementation of PyCryptoThird Party Advisory
-
https://github.com/dlitz/pycrypto/issues/253
Attack on PyCrypto's ElGamal Encryption with Proof-of-Concept (PoC) · Issue #253 · dlitz/pycrypto · GitHubExploit;Issue Tracking;Third Party Advisory
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