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CVE-2013-4238 (GCVE-0-2013-4238)

Vulnerability from cvelistv5 – Published: 2013-08-18 01:00 – Updated: 2024-08-06 16:38
VLAI
Summary
The ssl.match_hostname function in the SSL module in Python 2.6 through 3.4 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
Date Public
2013-08-15 00:00
Show details on NVD website
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              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-27T12:05:08+00:00",
      "cve": "CVE-2013-4238",
      "id": "CVE-2013-4238",
      "initial_release_date": "2013-08-12T00:00:00+00:00",
      "product_status:fixed": "81",
      "product_status:known_not_affected": "25",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "python: hostname check bypassing vulnerability in SSL module",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2013/cve-2013-4238.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-09T00:49:05Z",
      "cve": "CVE-2013-4238",
      "id": "CVE-2013-4238",
      "initial_release_date": "2023-02-15T05:36:31Z",
      "product_status:known_affected": "70",
      "product_status:known_not_affected": "109",
      "product_status:recommended": "1381",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2013-4238",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2013-4238.json",
      "version": "49"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.