cve-2024-6387
Vulnerability from cvelistv5
Published
2024-07-01 12:37
Modified
2024-09-14 02:09
Summary
Openssh: regresshion - race condition in ssh allows rce/dos
Show details on NVD website


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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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      "problemTypes": [
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              "cweId": "CWE-364",
              "description": "Signal Handler Race Condition",
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          "name": "RHSA-2024:4312",
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            "x_refsource_REDHAT"
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          "url": "https://access.redhat.com/errata/RHSA-2024:4340"
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          "name": "RHSA-2024:4389",
          "tags": [
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        {
          "name": "RHSA-2024:4469",
          "tags": [
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            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2024:4469"
        },
        {
          "name": "RHSA-2024:4474",
          "tags": [
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            "x_refsource_REDHAT"
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          "url": "https://access.redhat.com/errata/RHSA-2024:4474"
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          "name": "RHSA-2024:4479",
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          "url": "https://access.redhat.com/errata/RHSA-2024:4484"
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          "lang": "en",
          "time": "2024-06-27T00:00:00+00:00",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2024-07-01T08:00:00+00:00",
          "value": "Made public."
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      "title": "Openssh: regresshion - race condition in ssh allows rce/dos",
      "workarounds": [
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          "lang": "en",
          "value": "The below process can protect against a Remote Code Execution attack by disabling the LoginGraceTime parameter on Red Hat Enterprise Linux 9. However, the sshd server is still vulnerable to a Denial of Service if an attacker exhausts all the connections.\n\n1) As root user, open the /etc/ssh/sshd_config\n2) Add or edit the parameter configuration:\n~~~\nLoginGraceTime 0\n~~~\n3) Save and close the file\n4) Restart the sshd daemon:\n~~~\nsystemctl restart sshd.service\n~~~\n\nSetting LoginGraceTime to 0 disables the SSHD server\u0027s ability to drop connections if authentication is not completed within the specified timeout. If this mitigation is implemented, it is highly recommended to use a tool like \u0027fail2ban\u0027 alongside a firewall to monitor log files and manage connections appropriately.\n\nIf any of the mitigations mentioned above is used, please note that the removal of LoginGraceTime parameter from sshd_config is not automatic when the updated package is installed."
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    "assignerShortName": "redhat",
    "cveId": "CVE-2024-6387",
    "datePublished": "2024-07-01T12:37:25.431Z",
    "dateReserved": "2024-06-27T13:41:03.421Z",
    "dateUpdated": "2024-09-14T02:09:26.419Z",
    "state": "PUBLISHED"
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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