CVE-2012-5975 (GCVE-0-2012-5975)

Vulnerability from cvelistv5 – Published: 2012-12-04 23:00 – Updated: 2024-09-17 02:37
VLAI
Summary
The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.20, 6.1.0 through 6.1.12, 6.2.0 through 6.2.5, and 6.3.0 through 6.3.2 on UNIX and Linux, when old-style password authentication is enabled, allows remote attackers to bypass authentication via a crafted session involving entry of blank passwords, as demonstrated by a root login session from a modified OpenSSH client with an added input_userauth_passwd_changereq call in sshconnect2.c.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 29/100 over 2158 records in the last 180 days details
References
Show details on NVD website
To clipboard 

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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.20, 6.1.0 through 6.1.12, 6.2.0 through 6.2.5, and 6.3.0 through 6.3.2 on UNIX and Linux, when old-style password authentication is enabled, allows remote attackers to bypass authentication via a crafted session involving entry of blank passwords, as demonstrated by a root login session from a modified OpenSSH client with an added input_userauth_passwd_changereq call in sshconnect2.c."
          },
          {
            "lang": "es",
            "value": "La caracter\u00edstica SSH USERAUTH CHANGE REQUEST en SSH Tectia Server v6.0.4 hasta v6.0.20, v6.1.0 hasta v6.1.12, v6.2.0 hasta v6.2.5, y v6.3.0 hasta v6.3.2 en UNIX y Linux, cuando el  estilo viejo de autenticaci\u00f3n (old-style password authentication is) est\u00e1 activada, permite a atacantes remotos evitar la autenticaci\u00f3n a trav\u00e9s de una sesi\u00f3n manipulada que implica la entrada de contrase\u00f1as en blanco, como se demuestra por una sesi\u00f3n de login de root de un cliente OpenSSH modificados con una llamada adicional input_userauth_passwd_changereq en sshconnect2.c."
          }
        ],
        "id": "CVE-2012-5975",
        "lastModified": "2026-04-29T01:13:23.040",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 9.3,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 10.0,
              "obtainAllPrivilege": true,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2012-12-04T23:55:00.973",
        "references": [
          {
            "source": "cve@mitre.org",
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0013.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0065.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.exploit-db.com/exploits/23082/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit"
            ],
            "url": "https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/ssh/tectia_passwd_changereq.rb"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0013.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0065.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.exploit-db.com/exploits/23082/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
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            ],
            "url": "https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/ssh/tectia_passwd_changereq.rb"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-287"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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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

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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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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    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.