CVE-2023-29483 (GCVE-0-2023-29483)

Vulnerability from cvelistv5 – Published: 2024-04-11 00:00 – Updated: 2025-11-04 17:12
VLAI
Summary
eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a "TuDoor" attack. In other words, dnspython does not have the preferred behavior in which the DNS name resolution algorithm would proceed, within the full time window, in order to wait for a valid packet. NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1.
Severity
7 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • n/a
  • CWE-292 - DEPRECATED: Trusting Self-reported DNS Name
Assigner
References
Impacted products
Vendor Product Version
eventlet eventlet Affected: 0 , < 0.35.2 (custom)
Affected: 0 , < 2.6.0 (custom)
    cpe:2.3:a:eventlet:eventlet:*:*:*:*:*:*:*:*
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    "redhat_vex": {
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      "current_release_date": "2026-07-18T20:18:55+00:00",
      "cve": "CVE-2023-29483",
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      "product_status:fixed": "20",
      "product_status:known_affected": "6",
      "product_status:known_not_affected": "1213",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "dnspython: denial of service in stub resolver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-29483.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.dnspython.org/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/rthalley/dnspython/releases/tag/v2.6.0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/rthalley/dnspython/issues/1045\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.snyk.io/vuln/SNYK-PYTHON-DNSPYTHON-6241713\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/eventlet/eventlet/issues/913\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/eventlet/eventlet/releases/tag/v0.35.2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VOHJOO3OM65UIUUUVDEXMCTXNM6LXZEH/\", \"name\": \"FEDORA-2024-930af3332f\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240510-0001/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NLRKR57IFVKQC2GCXZBFLCLBAWBWL3F6/\", \"name\": \"FEDORA-2024-bbd76d7c63\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3BNSIK5NFYSAP53Y45GOCMOQHHDLGIF/\", \"name\": \"FEDORA-2024-3b4c7849ab\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NLRKR57IFVKQC2GCXZBFLCLBAWBWL3F6/\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VOHJOO3OM65UIUUUVDEXMCTXNM6LXZEH/\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-04T17:12:31.047Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-29483\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-04-11T17:34:51.471510Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:eventlet:eventlet:*:*:*:*:*:*:*:*\"], \"vendor\": \"eventlet\", \"product\": \"eventlet\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"0.35.2\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"2.6.0\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-292\", \"description\": \"CWE-292 DEPRECATED: Trusting Self-reported DNS Name\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-27T18:35:45.534Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"references\": [{\"url\": \"https://www.dnspython.org/\"}, {\"url\": \"https://github.com/rthalley/dnspython/releases/tag/v2.6.0\"}, {\"url\": \"https://github.com/rthalley/dnspython/issues/1045\"}, {\"url\": \"https://security.snyk.io/vuln/SNYK-PYTHON-DNSPYTHON-6241713\"}, {\"url\": \"https://github.com/eventlet/eventlet/issues/913\"}, {\"url\": \"https://github.com/eventlet/eventlet/releases/tag/v0.35.2\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VOHJOO3OM65UIUUUVDEXMCTXNM6LXZEH/\", \"name\": \"FEDORA-2024-930af3332f\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240510-0001/\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NLRKR57IFVKQC2GCXZBFLCLBAWBWL3F6/\", \"name\": \"FEDORA-2024-bbd76d7c63\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3BNSIK5NFYSAP53Y45GOCMOQHHDLGIF/\", \"name\": \"FEDORA-2024-3b4c7849ab\", \"tags\": [\"vendor-advisory\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a \\\"TuDoor\\\" attack. In other words, dnspython does not have the preferred behavior in which the DNS name resolution algorithm would proceed, within the full time window, in order to wait for a valid packet. NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2024-06-26T02:06:08.072Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-29483\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T17:12:31.047Z\", \"dateReserved\": \"2023-04-07T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2024-04-11T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.