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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "unaffected"
        }
      ],
      "timeline": [
        {
          "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."
        }
      ],
      "datePublic": "2024-07-01T08:00:00+00:00",
      "references": [
        {
          "url": "https://access.redhat.com/errata/RHSA-2024:4312",
          "name": "RHSA-2024:4312",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://access.redhat.com/errata/RHSA-2024:4340",
          "name": "RHSA-2024:4340",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://access.redhat.com/errata/RHSA-2024:4389",
          "name": "RHSA-2024:4389",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://access.redhat.com/errata/RHSA-2024:4469",
          "name": "RHSA-2024:4469",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://access.redhat.com/errata/RHSA-2024:4474",
          "name": "RHSA-2024:4474",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://access.redhat.com/errata/RHSA-2024:4479",
          "name": "RHSA-2024:4479",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://access.redhat.com/errata/RHSA-2024:4484",
          "name": "RHSA-2024:4484",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://access.redhat.com/security/cve/CVE-2024-6387",
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2294604",
          "name": "RHBZ#2294604",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ]
        },
        {
          "url": "https://santandersecurityresearch.github.io/blog/sshing_the_masses.html"
        },
        {
          "url": "https://www.openssh.com/txt/release-9.8"
        },
        {
          "url": "https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt"
        }
      ],
      "workarounds": [
        {
          "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's 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 'fail2ban' 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."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "type": "CWE",
              "cweId": "CWE-364",
              "description": "Signal Handler Race Condition"
            }
          ]
        }
      ],
      "providerMetadata": {
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat",
        "dateUpdated": "2024-11-24T17:19:20.471Z"
      },
      "x_redhatCweChain": "CWE-364: Signal Handler Race Condition"
    }
  },
  "cveMetadata": {
    "cveId": "CVE-2024-6387",
    "state": "PUBLISHED",
    "dateUpdated": "2024-11-24T17:19:20.471Z",
    "dateReserved": "2024-06-27T13:41:03.421Z",
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "datePublished": "2024-07-01T12:37:25.431Z",
    "assignerShortName": "redhat"
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  "dataVersion": "5.1"
}