nvd-json-data-feeds/CVE-2024/CVE-2024-64xx/CVE-2024-6409.json

{
  "id": "CVE-2024-6409",
  "sourceIdentifier": "secalert@redhat.com",
  "published": "2024-07-08T18:15:09.487",
  "lastModified": "2024-07-10T20:15:04.853",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A signal handler race condition vulnerability was found in OpenSSH's server (sshd) in Red Hat Enterprise Linux 9, where a client does not authenticate within LoginGraceTime seconds (120 by default, 600 in old OpenSSH versions), then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). This issue leaves it vulnerable to a signal handler race condition on the cleanup_exit() function, which introduces the same vulnerability as CVE-2024-6387 in the unprivileged child of the SSHD server. As a consequence of a successful attack, in the worst case scenario, the attacker may be able to perform a remote code execution (RCE) within unprivileged user running the sshd server. This vulnerability affects only the sshd server shipped with Red Hat Enterprise Linux 9, while upstream versions of sshd are not impact by this flaw."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una vulnerabilidad de condici\u00f3n de ejecuci\u00f3n del controlador de se\u00f1ales en el servidor de OpenSSH (sshd), donde un cliente no se autentica dentro de los segundos de LoginGraceTime (120 de forma predeterminada, 600 en versiones anteriores de OpenSSH), luego se llama al controlador SIGALRM de sshd de forma asincr\u00f3nica. Sin embargo, este controlador de se\u00f1ales llama a varias funciones que no son seguras para se\u00f1ales as\u00edncronas, por ejemplo, syslog(). Este problema lo deja vulnerable a una condici\u00f3n de ejecuci\u00f3n del controlador de se\u00f1ales en la funci\u00f3n cleanup_exit(), que introduce la misma vulnerabilidad que CVE-2024-6387 en el hijo sin privilegios del servidor SSHD."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "secalert@redhat.com",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 4.7
      }
    ]
  },
  "weaknesses": [
    {
      "source": "secalert@redhat.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-364"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "http://www.openwall.com/lists/oss-security/2024/07/08/2",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2024/07/09/2",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2024/07/09/5",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2024/07/10/1",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2024/07/10/2",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2024-6409",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://almalinux.org/blog/2024-07-09-cve-2024-6409/",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2295085",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=1227217",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://explore.alas.aws.amazon.com/CVE-2024-6409.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://github.com/openela-main/openssh/commit/c00da7741d42029e49047dd89e266d91dcfbffa0",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://security-tracker.debian.org/tracker/CVE-2024-6409",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://sig-security.rocky.page/issues/CVE-2024-6409/",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://ubuntu.com/security/CVE-2024-6409",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.suse.com/security/cve/CVE-2024-6409.html",
      "source": "secalert@redhat.com"
    }
  ]
}