CVE-2024-39894 (GCVE-0-2024-39894)
Vulnerability from cvelistv5
Published
2024-07-02 00:00
Modified
2025-11-04 16:12
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • n/a
Summary
OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:openbsd:openssh:9.5:-:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "openssh",
            "vendor": "openbsd",
            "versions": [
              {
                "lessThanOrEqual": "9.7",
                "status": "affected",
                "version": "9.5",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-39894",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-07-03T13:15:38.073610Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-367",
                "description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-03T13:15:54.538Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T16:12:30.897Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-25:01.openssh.asc"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.openssh.com/txt/release-9.8"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2024/07/02/1"
          },
          {
            "name": "[oss-security] 20240703 Re: Announce: OpenSSH 9.8 released",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2024/07/03/6"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240712-0004/"
          },
          {
            "name": "[oss-security] 20240723 Re: linux-distros application for CentOS Project\u0027s Hyperscale SIG",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2024/07/23/4"
          },
          {
            "name": "[oss-security] 20240723 Re: linux-distros application for CentOS Project\u0027s Hyperscale SIG",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2024/07/23/6"
          },
          {
            "name": "[oss-security] 20240728 Re: Announce: OpenSSH 9.8 released",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2024/07/28/3"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2024/Sep/33"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-09-11T15:12:12.186Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://www.openssh.com/txt/release-9.8"
        },
        {
          "url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html"
        },
        {
          "url": "https://www.openwall.com/lists/oss-security/2024/07/02/1"
        },
        {
          "name": "[oss-security] 20240703 Re: Announce: OpenSSH 9.8 released",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2024/07/03/6"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240712-0004/"
        },
        {
          "name": "[oss-security] 20240723 Re: linux-distros application for CentOS Project\u0027s Hyperscale SIG",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2024/07/23/4"
        },
        {
          "name": "[oss-security] 20240723 Re: linux-distros application for CentOS Project\u0027s Hyperscale SIG",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2024/07/23/6"
        },
        {
          "name": "[oss-security] 20240728 Re: Announce: OpenSSH 9.8 released",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2024/07/28/3"
        },
        {
          "url": "https://crzphil.github.io/posts/ssh-obfuscation-bypass/"
        },
        {
          "url": "https://news.ycombinator.com/item?id=41508530"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2024-39894",
    "datePublished": "2024-07-02T00:00:00.000Z",
    "dateReserved": "2024-07-02T00:00:00.000Z",
    "dateUpdated": "2025-11-04T16:12:30.897Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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