Vulnerability-Lookup

GHSA-27Q9-H529-Q4G3

Vulnerability from github – Published: 2023-12-24 09:30 – Updated: 2026-10-15 03:33

Details

OpenSSH through 9.6, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mm_answer_authpassword does not resist flips of a single bit. NOTE: this is applicable to a certain threat model of attacker-victim co-location in which the attacker has user privileges.

Severity

7.0 (High)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2023-51767"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-12-24T07:15:07Z",
    "severity": "HIGH"
  },
  "details": "OpenSSH through 9.6, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mm_answer_authpassword does not resist flips of a single bit. NOTE: this is applicable to a certain threat model of attacker-victim co-location in which the attacker has user privileges.",
  "id": "GHSA-27q9-h529-q4g3",
  "modified": "2026-10-15T03:33:11Z",
  "published": "2023-12-24T09:30:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-51767"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2023-51767"
    },
    {
      "type": "WEB",
      "url": "https://arxiv.org/abs/2309.02545"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2255850"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-794697.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20240125-0006"
    },
    {
      "type": "WEB",
      "url": "https://ubuntu.com/security/CVE-2023-51767"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2025/09/22/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/22/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/22/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/23/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/23/3"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/23/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/23/5"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/24/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/24/7"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/25/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/25/6"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/26/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/26/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/27/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/27/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/27/3"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/27/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/27/5"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/27/6"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/27/7"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/28/7"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/29/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/29/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/29/5"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/09/29/6"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/10/01/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/10/01/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-51767 (GCVE-0-2023-51767)

Vulnerability from cvelistv5 – Published: 2023-12-24 00:00 – Updated: 2026-10-15 00:16 Disputed

Summary

OpenSSH through 10.0, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mm_answer_authpassword does not resist flips of a single bit. NOTE: this is applicable to a certain threat model of attacker-victim co-location in which the attacker has user privileges. NOTE: this is disputed by the Supplier, who states "we do not consider it to be the application's responsibility to defend against platform architectural weaknesses."

Severity

7 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-02 15:08 UTC

CWE

n/a
NVD-CWE-Other

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2261 records in the last 180 days details

References

35 references

URL	Tags
https://arxiv.org/abs/2309.02545
https://github.com/openssh/openssh-portable/blob/…
https://github.com/openssh/openssh-portable/blob/…
https://bugzilla.redhat.com/show_bug.cgi?id=2255850
https://access.redhat.com/security/cve/CVE-2023-51767
https://ubuntu.com/security/CVE-2023-51767
https://security.netapp.com/advisory/ntap-2024012…
https://www.openwall.com/lists/oss-security/2025/…
http://www.openwall.com/lists/oss-security/2025/10/01/1
http://www.openwall.com/lists/oss-security/2025/09/22/1
http://www.openwall.com/lists/oss-security/2025/09/24/4
http://www.openwall.com/lists/oss-security/2025/09/22/2
http://www.openwall.com/lists/oss-security/2025/09/23/4
http://www.openwall.com/lists/oss-security/2025/10/01/2
http://www.openwall.com/lists/oss-security/2025/09/26/2
http://www.openwall.com/lists/oss-security/2025/09/26/4
http://www.openwall.com/lists/oss-security/2025/09/27/1
http://www.openwall.com/lists/oss-security/2025/09/27/2
http://www.openwall.com/lists/oss-security/2025/09/27/3
http://www.openwall.com/lists/oss-security/2025/09/27/5
http://www.openwall.com/lists/oss-security/2025/09/27/6
http://www.openwall.com/lists/oss-security/2025/09/27/7
http://www.openwall.com/lists/oss-security/2025/09/29/4
http://www.openwall.com/lists/oss-security/2025/09/29/5
http://www.openwall.com/lists/oss-security/2025/09/23/1
http://www.openwall.com/lists/oss-security/2025/09/29/6
http://www.openwall.com/lists/oss-security/2025/09/23/3
http://www.openwall.com/lists/oss-security/2025/09/23/5
http://www.openwall.com/lists/oss-security/2025/09/24/7
http://www.openwall.com/lists/oss-security/2025/09/25/2
http://www.openwall.com/lists/oss-security/2025/09/25/6
http://www.openwall.com/lists/oss-security/2025/09/27/4
http://www.openwall.com/lists/oss-security/2025/09/28/7
http://www.openwall.com/lists/oss-security/2025/09/29/1
https://cert-portal.siemens.com/productcert/html/…

Impacted products

1 product

Vendor	Product	Version
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < V1.1 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-18T22:03:38.917Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://arxiv.org/abs/2309.02545"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2255850"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2023-51767"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://ubuntu.com/security/CVE-2023-51767"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240125-0006/"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/10/01/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/22/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/24/4"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/22/2"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/23/4"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/10/01/2"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/26/2"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/26/4"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/27/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/27/2"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/27/3"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/27/5"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/27/6"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/27/7"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/29/4"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/29/5"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/23/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/29/6"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/23/3"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/23/5"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/24/7"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/25/2"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/25/6"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/27/4"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/28/7"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/29/1"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-51767",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-02T15:08:29.899238Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "NVD-CWE-Other",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-02T15:08:45.809Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "V1.1",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-15T00:16:50.185Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-794697.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenSSH through 10.0, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mm_answer_authpassword does not resist flips of a single bit. NOTE: this is applicable to a certain threat model of attacker-victim co-location in which the attacker has user privileges. NOTE: this is disputed by the Supplier, who states \"we do not consider it to be the application\u0027s responsibility to defend against platform architectural weaknesses.\""
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-22T16:42:44.854Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://arxiv.org/abs/2309.02545"
        },
        {
          "url": "https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878"
        },
        {
          "url": "https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77"
        },
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2255850"
        },
        {
          "url": "https://access.redhat.com/security/cve/CVE-2023-51767"
        },
        {
          "url": "https://ubuntu.com/security/CVE-2023-51767"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240125-0006/"
        },
        {
          "url": "https://www.openwall.com/lists/oss-security/2025/09/22/1"
        }
      ],
      "tags": [
        "disputed"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2023-51767",
    "datePublished": "2023-12-24T00:00:00.000Z",
    "dateReserved": "2023-12-24T00:00:00.000Z",
    "dateUpdated": "2026-10-15T00:16:50.185Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted