ghsa-9xp3-mp9c-47rf
Vulnerability from github
Published
2022-05-24 17:39
Modified
2022-05-24 17:39
Details

A flaw was found in dnsmasq before version 2.83. When receiving a query, dnsmasq does not check for an existing pending request for the same name and forwards a new request. By default, a maximum of 150 pending queries can be sent to upstream servers, so there can be at most 150 queries for the same name. This flaw allows an off-path attacker on the network to substantially reduce the number of attempts that it would have to perform to forge a reply and have it accepted by dnsmasq. This issue is mentioned in the "Birthday Attacks" section of RFC5452. If chained with CVE-2020-25684, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.

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{
   affected: [],
   aliases: [
      "CVE-2020-25686",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-358",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2021-01-20T17:15:00Z",
      severity: "MODERATE",
   },
   details: "A flaw was found in dnsmasq before version 2.83. When receiving a query, dnsmasq does not check for an existing pending request for the same name and forwards a new request. By default, a maximum of 150 pending queries can be sent to upstream servers, so there can be at most 150 queries for the same name. This flaw allows an off-path attacker on the network to substantially reduce the number of attempts that it would have to perform to forge a reply and have it accepted by dnsmasq. This issue is mentioned in the \"Birthday Attacks\" section of RFC5452. If chained with CVE-2020-25684, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.",
   id: "GHSA-9xp3-mp9c-47rf",
   modified: "2022-05-24T17:39:33Z",
   published: "2022-05-24T17:39:33Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2020-25686",
      },
      {
         type: "WEB",
         url: "https://bugzilla.redhat.com/show_bug.cgi?id=1890125",
      },
      {
         type: "WEB",
         url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME",
      },
      {
         type: "WEB",
         url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32",
      },
      {
         type: "WEB",
         url: "https://security.gentoo.org/glsa/202101-17",
      },
      {
         type: "WEB",
         url: "https://www.arista.com/en/support/advisories-notices/security-advisories/12135-security-advisory-61",
      },
      {
         type: "WEB",
         url: "https://www.debian.org/security/2021/dsa-4844",
      },
      {
         type: "WEB",
         url: "https://www.jsof-tech.com/disclosures/dnspooq",
      },
   ],
   schema_version: "1.4.0",
   severity: [],
}


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