GHSA-6528-wvf6-f6qg
Vulnerability from github
Published
2018-07-12 20:29
Modified
2024-10-18 21:58
Severity ?
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
Pycrypto generates weak key parameters
Details

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.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pycrypto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2.6.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-6594"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-326"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T21:18:02Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "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\u0027s ElGamal implementation.",
  "id": "GHSA-6528-wvf6-f6qg",
  "modified": "2024-10-18T21:58:31Z",
  "published": "2018-07-12T20:29:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-6594"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dlitz/pycrypto/issues/253"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TElgamal/attack-on-pycrypto-elgamal"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-6528-wvf6-f6qg"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/dlitz/pycrypto"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/pycrypto/PYSEC-2018-97.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00018.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202007-62"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3616-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3616-2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Pycrypto generates weak key parameters"
}


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