cve-2024-39894
Vulnerability from cvelistv5
Published
2024-07-02 00:00
Modified
2024-09-11 15:12
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.
Impacted products
n/an/a
Show details on NVD website


{
  "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"
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        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.openssh.com/txt/release-9.8"
          },
          {
            "tags": [
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            "url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html"
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            "url": "https://www.openwall.com/lists/oss-security/2024/07/02/1"
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          {
            "name": "[oss-security] 20240703 Re: Announce: OpenSSH 9.8 released",
            "tags": [
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            "url": "https://security.netapp.com/advisory/ntap-20240712-0004/"
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            "tags": [
              "mailing-list",
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        ],
        "title": "CVE Program Container"
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    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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              "version": "n/a"
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      ],
      "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": [
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          "descriptions": [
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              "lang": "en",
              "type": "text"
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      "providerMetadata": {
        "dateUpdated": "2024-09-11T15:12:12.186999",
        "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"
        },
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          "url": "https://www.openwall.com/lists/oss-security/2024/07/02/1"
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          "name": "[oss-security] 20240703 Re: Announce: OpenSSH 9.8 released",
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          "tags": [
            "mailing-list"
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        },
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        },
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          "tags": [
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          ],
          "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",
    "dateReserved": "2024-07-02T00:00:00",
    "dateUpdated": "2024-09-11T15:12:12.186999",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-39894\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2024-07-02T18:15:03.710\",\"lastModified\":\"2024-09-11T16:15:06.003\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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.\"},{\"lang\":\"es\",\"value\":\"OpenSSH 9.5 a 9.7 anterior a 9.8 a veces permite ataques de sincronizaci\u00f3n contra la entrada de contrase\u00f1a sin eco (por ejemplo, para su y Sudo) debido a un error l\u00f3gico de ObscureKeystrokeTiming. De manera similar, podr\u00edan ocurrir otros ataques de sincronizaci\u00f3n contra la entrada de teclas.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":1.6,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-367\"}]}],\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2024/07/03/6\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/07/23/4\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/07/23/6\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/07/28/3\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://crzphil.github.io/posts/ssh-obfuscation-bypass/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://news.ycombinator.com/item?id=41508530\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20240712-0004/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://www.openssh.com/txt/release-9.8\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://www.openwall.com/lists/oss-security/2024/07/02/1\",\"source\":\"cve@mitre.org\"}]}}"
  }
}


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