Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 69.7%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
- https://github.com/TElgamal/attack-on-pycrypto-elgamal
- https://github.com/dlitz/pycrypto/issues/253
- 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/
- https://github.com/TElgamal/attack-on-pycrypto-elgamal
- https://github.com/dlitz/pycrypto/issues/253
- 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/
Products affected by CVE-2018-6594
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cpe:2.3:a:dlitz:pycrypto:1.0.0
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cpe:2.3:a:dlitz:pycrypto:1.0.1
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cpe:2.3:a:dlitz:pycrypto:1.0.2
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cpe:2.3:a:dlitz:pycrypto:1.1
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cpe:2.3:a:dlitz:pycrypto:1.9
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cpe:2.3:a:dlitz:pycrypto:2.0
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cpe:2.3:a:dlitz:pycrypto:2.0.1
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cpe:2.3:a:dlitz:pycrypto:2.1.0
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cpe:2.3:a:dlitz:pycrypto:2.2
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cpe:2.3:a:dlitz:pycrypto:2.3
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cpe:2.3:a:dlitz:pycrypto:2.4
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cpe:2.3:a:dlitz:pycrypto:2.4.1
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cpe:2.3:a:dlitz:pycrypto:2.5
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cpe:2.3:a:dlitz:pycrypto:2.6
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cpe:2.3:a:dlitz:pycrypto:2.6.1
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cpe:2.3:o:canonical:ubuntu_linux:12.04
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cpe:2.3:o:canonical:ubuntu_linux:14.04
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cpe:2.3:o:canonical:ubuntu_linux:16.04
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cpe:2.3:o:canonical:ubuntu_linux:17.10
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cpe:2.3:o:debian:debian_linux:7.0