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CVE-2015-1799 (GCVE-0-2015-1799)

Vulnerability from cvelistv5 – Published: 2015-04-08 10:00 – Updated: 2024-08-06 04:54
VLAI
Summary
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
URL Tags
http://www.debian.org/security/2015/dsa-3222 vendor-advisoryx_refsource_DEBIAN
http://tools.cisco.com/security/center/viewAlert.… vendor-advisoryx_refsource_CISCO
http://listengine.tuxfamily.org/chrony.tuxfamily.… mailing-listx_refsource_MLIST
http://www.ubuntu.com/usn/USN-2567-1 vendor-advisoryx_refsource_UBUNTU
http://www.kb.cert.org/vuls/id/374268 third-party-advisoryx_refsource_CERT-VN
http://www.securityfocus.com/bid/73950 vdb-entryx_refsource_BID
http://marc.info/?l=bugtraq&m=143213867103400&w=2 vendor-advisoryx_refsource_HP
http://lists.fedoraproject.org/pipermail/package-… vendor-advisoryx_refsource_FEDORA
http://support.ntp.org/bin/view/Main/SecurityNoti… x_refsource_CONFIRM
https://kc.mcafee.com/corporate/index?page=conten… x_refsource_CONFIRM
http://lists.fedoraproject.org/pipermail/package-… vendor-advisoryx_refsource_FEDORA
http://lists.apple.com/archives/security-announce… vendor-advisoryx_refsource_APPLE
http://lists.opensuse.org/opensuse-updates/2015-0… vendor-advisoryx_refsource_SUSE
http://www.oracle.com/technetwork/topics/security… x_refsource_CONFIRM
https://security.gentoo.org/glsa/201509-01 vendor-advisoryx_refsource_GENTOO
http://www.mandriva.com/security/advisories?name=… vendor-advisoryx_refsource_MANDRIVA
http://www.oracle.com/technetwork/topics/security… x_refsource_CONFIRM
http://support.apple.com/kb/HT204942 x_refsource_CONFIRM
http://marc.info/?l=bugtraq&m=145750740530849&w=2 vendor-advisoryx_refsource_HP
http://rhn.redhat.com/errata/RHSA-2015-1459.html vendor-advisoryx_refsource_REDHAT
http://bugs.ntp.org/show_bug.cgi?id=2781 x_refsource_CONFIRM
http://tools.cisco.com/security/center/content/Ci… vendor-advisoryx_refsource_CISCO
http://www.debian.org/security/2015/dsa-3223 vendor-advisoryx_refsource_DEBIAN
http://www.securitytracker.com/id/1032031 vdb-entryx_refsource_SECTRACK
Date Public
2015-04-07 00:00
Show details on NVD website
To clipboard 

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\"http://www.debian.org/security/2015/dsa-3222\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.debian.org/security/2015/dsa-3223\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.kb.cert.org/vuls/id/374268\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\", \"US Government Resource\"]}, {\"url\": \"http://www.mandriva.com/security/advisories?name=MDVSA-2015:202\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.securityfocus.com/bid/73950\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.securitytracker.com/id/1032031\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.ubuntu.com/usn/USN-2567-1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10114\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://security.gentoo.org/glsa/201509-01\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "secalert@redhat.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-17\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2015-1799\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2015-04-08T10:59:05.717\",\"lastModified\":\"2026-05-06T22:30:45.220\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.\"},{\"lang\":\"es\",\"value\":\"La caracter\u00edstica symmetric-key en la funci\u00f3n receive en ntp_proto.c en ntpd en NTP 3.x y 4.x anterior a 4.2.8p2 realiza actualizaciones de las variables de estados al recibir ciertos paquetes inv\u00e1lidos, lo que facilita a atacantes man-in-the-middle causar una denegaci\u00f3n de servicio (perdida de sincronizaci\u00f3n) mediante la falsificaci\u00f3n de la direcci\u00f3n del IP de fuente de un par.\"}],\"metrics\":{\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:A/AC:M/Au:N/C:N/I:P/A:P\",\"baseScore\":4.3,\"accessVector\":\"ADJACENT_NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":5.5,\"impactScore\":4.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-17\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"4.2.7p444\",\"matchCriteriaId\":\"E538FCAE-3E2C-4EA8-A74F-ABF47652C15C\"}]}]}],\"references\":[{\"url\":\"http://bugs.ntp.org/show_bug.cgi?id=2781\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://marc.info/?l=bugtraq\u0026m=143213867103400\u0026w=2\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://marc.info/?l=bugtraq\u0026m=145750740530849\u0026w=2\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://rhn.redhat.com/errata/RHSA-2015-1459.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://support.apple.com/kb/HT204942\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Vendor 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T12:20:12+00:00",
      "cve": "CVE-2015-1799",
      "id": "CVE-2015-1799",
      "initial_release_date": "2015-04-07T00:00:00+00:00",
      "product_status:fixed": "328",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "ntp: authentication doesn\u0027t protect symmetric associations against DoS attacks",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2015/cve-2015-1799.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-05T23:59:14Z",
      "cve": "CVE-2015-1799",
      "id": "CVE-2015-1799",
      "initial_release_date": "2023-02-15T05:21:21Z",
      "product_status:known_not_affected": "3",
      "product_status:recommended": "105",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2015-1799",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2015-1799.json",
      "version": "11"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.