Vulnerability in Dlitz Pycrypto
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.020 (80.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Dlitz Pycrypto
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/TElgamal/attack-on-pycrypto-elgamal (Third Party Advisory)
- usn.ubuntu.com/3616-1/ (vendor-advisory, Third Party Advisory)
- github.com/dlitz/pycrypto/issues/253 (Exploit, Third Party Advisory, Issue Tracking)
- lists.debian.org/debian-lts-announce/2018/02/msg00018.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3616-2/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202007-62 (vendor-advisory)
Frequently asked questions
- What is CVE-2018-6594?
- CVE-2018-6594 is a high-severity vulnerability in Dlitz Pycrypto, classified under Inadequate Encryption Strength. CVSS score: 7.5/10. Published 2018-02-03.
- How severe is CVE-2018-6594?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-6594 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.