gsd-2020-25684
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the forward.c:reply_query() if the reply destination address/port is used by the pending forwarded queries. However, it does not use the address/port to retrieve the exact forwarded query, substantially reducing the number of attempts an attacker on the network would have to perform to forge a reply and get it accepted by dnsmasq. This issue contrasts with RFC5452, which specifies a query's attributes that all must be used to match a reply. This flaw allows an attacker to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25685 or CVE-2020-25686, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.
Aliases
Aliases



{
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    "alias": "CVE-2020-25684",
    "description": "A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the forward.c:reply_query() if the reply destination address/port is used by the pending forwarded queries. However, it does not use the address/port to retrieve the exact forwarded query, substantially reducing the number of attempts an attacker on the network would have to perform to forge a reply and get it accepted by dnsmasq. This issue contrasts with RFC5452, which specifies a query\u0027s attributes that all must be used to match a reply. This flaw allows an attacker to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25685 or CVE-2020-25686, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.",
    "id": "GSD-2020-25684",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-25684.html",
      "https://www.debian.org/security/2021/dsa-4844",
      "https://access.redhat.com/errata/RHSA-2021:0401",
      "https://access.redhat.com/errata/RHSA-2021:0395",
      "https://access.redhat.com/errata/RHSA-2021:0245",
      "https://access.redhat.com/errata/RHSA-2021:0240",
      "https://access.redhat.com/errata/RHSA-2021:0156",
      "https://access.redhat.com/errata/RHSA-2021:0155",
      "https://access.redhat.com/errata/RHSA-2021:0154",
      "https://access.redhat.com/errata/RHSA-2021:0153",
      "https://access.redhat.com/errata/RHSA-2021:0152",
      "https://access.redhat.com/errata/RHSA-2021:0151",
      "https://access.redhat.com/errata/RHSA-2021:0150",
      "https://ubuntu.com/security/CVE-2020-25684",
      "https://advisories.mageia.org/CVE-2020-25684.html",
      "https://security.archlinux.org/CVE-2020-25684",
      "https://linux.oracle.com/cve/CVE-2020-25684.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
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      "id": "GSD-2020-25684",
      "modified": "2023-12-13T01:21:57.265733Z",
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          "cvssV2": {
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            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
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          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
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          "userInteractionRequired": false
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
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          "impactScore": 1.4
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      "lastModifiedDate": "2022-02-14T14:56Z",
      "publishedDate": "2021-01-20T16:15Z"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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