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curl — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2009-2417

lib/ssluse.c in cURL and libcurl 7.4 through 7.19.5, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) 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.

Products
curl
Affected versions
Not specified
Fixed versions
7.19.5-1.1
CVEs
CVE-2009-2417
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 23:24 UTC · Revision 1

Source evidence

DEBIAN-CVE-2009-2417

core-osv · Original source

Published 14 Aug 2009, 15:16 UTC

lib/ssluse.c in cURL and libcurl 7.4 through 7.19.5, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) 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.

osv:DEBIAN-CVE-2009-2417

curl

Fixed versions: 7.19.5-1.1

curl

Fixed versions: 7.19.5-1.1

curl

Fixed versions: 7.19.5-1.1

Complete source record
{
  "id": "9d705897859df98c15bbcaa7c620c09d9513e11d6b8a92f5969ec522d165e94d",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2009-2417",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2009-2417",
    "summary": "lib/ssluse.c in cURL and libcurl 7.4 through 7.19.5, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the subject's Common Name (CN) 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.",
    "evidence": "osv:DEBIAN-CVE-2009-2417",
    "products": [
      {
        "name": {
          "value": "curl",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.19.5-1.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "curl",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.19.5-1.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "curl",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.19.5-1.1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "DEBIAN-CVE-2009-2417",
      "aliases": [
        "DEBIAN-CVE-2009-2417"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7.19.5-1.1"
                }
              ]
            }
          ],
          "package": {
            "name": "curl",
            "purl": "pkg:deb/debian/curl?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2417.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7.19.5-1.1"
                }
              ]
            }
          ],
          "package": {
            "name": "curl",
            "purl": "pkg:deb/debian/curl?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2417.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7.19.5-1.1"
                }
              ]
            }
          ],
          "package": {
            "name": "curl",
            "purl": "pkg:deb/debian/curl?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2417.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        }
      ],
      "modified": "2026-10-23T17:47:42.878714060Z",
      "provider": "osv",
      "upstream": [
        "CVE-2009-2417"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2009-2417"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2009-2417",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 418510,
  "published_at": "2009-08-14T15:16:27.39+00:00"
}