FKIE_CVE-2013-0176

Vulnerability from fkie_nvd - Published: 2013-02-05 23:55 - Updated: 2025-04-11 00:51
Severity ?
Summary
The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a "Client: Diffie-Hellman Key Exchange Init" packet.
References
secalert@redhat.comhttp://lists.fedoraproject.org/pipermail/package-announce/2013-February/098065.html
secalert@redhat.comhttp://lists.fedoraproject.org/pipermail/package-announce/2013-February/098094.html
secalert@redhat.comhttp://secunia.com/advisories/51982Vendor Advisory
secalert@redhat.comhttp://www.libssh.org/2013/01/22/libssh-0-5-4-security-release/Patch, Vendor Advisory
secalert@redhat.comhttp://www.ubuntu.com/usn/USN-1707-1
secalert@redhat.comhttps://exchange.xforce.ibmcloud.com/vulnerabilities/81595
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098065.html
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098094.html
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/51982Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.libssh.org/2013/01/22/libssh-0-5-4-security-release/Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-1707-1
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/81595
Impacted products
Vendor Product Version
libssh libssh *
libssh libssh 0.4.7
libssh libssh 0.4.8
libssh libssh 0.5.0
libssh libssh 0.5.0
libssh libssh 0.5.1
libssh libssh 0.5.2
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              "matchCriteriaId": "F3619856-CA8F-455D-BC33-E6BA533C4165",
              "versionEndIncluding": "0.5.3",
              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a \"Client: Diffie-Hellman Key Exchange Init\" packet."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n publickey_from_privatekey en libssh anterior a v0.5.4, cuando ningun algoritmo coincide durante la negociacion, permite a atacantes remotos causar una denegaci\u00f3n de servicio (referencia NULL y ca\u00edda de la aplicaci\u00f3n) mediante un paquete \"Client: Diffie-Hellman Key Exchange Init\""
    }
  ],
  "id": "CVE-2013-0176",
  "lastModified": "2025-04-11T00:51:21.963",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
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  },
  "published": "2013-02-05T23:55:01.850",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098065.html"
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      "source": "secalert@redhat.com",
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      "source": "secalert@redhat.com",
      "url": "http://www.ubuntu.com/usn/USN-1707-1"
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  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • 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.
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Detection rules are retrieved from Rulezet.