CVE-2018-6594

Public Exploit

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.64%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/TElgamal/attack-on-pycrypto-elgamal third party advisory
https://usn.ubuntu.com/3616-1/ third party advisory vendor advisory
https://github.com/dlitz/pycrypto/issues/253 issue tracking exploit third party advisory
https://lists.debian.org/debian-lts-announce/2018/02/msg00018.html third party advisory mailing list
https://usn.ubuntu.com/3616-2/ third party advisory vendor advisory
https://security.gentoo.org/glsa/202007-62 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-6594?
CVE-2018-6594 has been scored as a high severity vulnerability.
How to fix CVE-2018-6594?
To fix CVE-2018-6594, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-6594 being actively exploited in the wild?
It is possible that CVE-2018-6594 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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