Inadequate Encryption Strength Affecting pycryptodome package, versions <3.4.11-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-PYCRYPTODOME-11765501
- published10 Aug 2025
- disclosed3 Feb 2018
Introduced: 3 Feb 2018
CVE-2018-6594 (opens in a new tab)How to fix?
Upgrade Debian:14 pycryptodome to version 3.4.11-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream pycryptodome package and not the pycryptodome package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2018-6594
- https://lists.debian.org/debian-lts-announce/2018/02/msg00018.html
- https://security.gentoo.org/glsa/202007-62
- https://github.com/dlitz/pycrypto/issues/253
- https://github.com/TElgamal/attack-on-pycrypto-elgamal
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-6594
- https://usn.ubuntu.com/3616-1/
- https://usn.ubuntu.com/3616-2/