CVE-2015-1798 (GCVE-0-2015-1798)

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 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1082 records in the last 180 days details
References
URL Tags
http://www.securitytracker.com/id/1032032 vdb-entryx_refsource_SECTRACK
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://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://tools.cisco.com/security/center/viewAlert.… vendor-advisoryx_refsource_CISCO
http://www.mandriva.com/security/advisories?name=… vendor-advisoryx_refsource_MANDRIVA
http://www.oracle.com/technetwork/topics/security… x_refsource_CONFIRM
http://www.securityfocus.com/bid/73951 vdb-entryx_refsource_BID
http://support.apple.com/kb/HT204942 x_refsource_CONFIRM
http://rhn.redhat.com/errata/RHSA-2015-1459.html vendor-advisoryx_refsource_REDHAT
http://tools.cisco.com/security/center/content/Ci… vendor-advisoryx_refsource_CISCO
http://bugs.ntp.org/show_bug.cgi?id=2779 x_refsource_CONFIRM
http://www.debian.org/security/2015/dsa-3223 vendor-advisoryx_refsource_DEBIAN
Date Public
2015-04-07 00:00
Show details on NVD website
To clipboard 

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          "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2015:202"
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        {
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        {
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        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "http://www.ubuntu.com/usn/USN-2567-1"
        },
        {
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        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://security.gentoo.org/glsa/201509-01"
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      ],
      "sourceIdentifier": "secalert@redhat.com",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-17"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*",
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC."
          },
          {
            "lang": "es",
            "value": "La caracter\u00edstica symmetric-key en la funci\u00f3n receive en ntp_proto.c en ntpd en NTP 4.x anterior a 4.2.8p2 requiere un MAC correcto \u00fanicamente si el campo MAC tiene una longitud que no sea cero, lo que facilita a atacantes man-in-the-middle falsificar paquetes mediante la omisi\u00f3n del MAC."
          }
        ],
        "id": "CVE-2015-1798",
        "lastModified": "2026-05-06T22:30:45.220",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "HIGH",
                "accessVector": "ADJACENT_NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 1.8,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:A/AC:H/Au:N/C:N/I:P/A:N",
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              "exploitabilityScore": 3.2,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2015-04-08T10:59:04.610",
        "references": [
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            "source": "secalert@redhat.com",
            "url": "http://bugs.ntp.org/show_bug.cgi?id=2779"
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          },
          {
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            "tags": [
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            "url": "http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities"
          },
          {
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            "url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd"
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        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
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          {
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              {
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                "value": "CWE-17"
              }
            ],
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            "type": "Primary"
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    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T12:20:11+00:00",
      "cve": "CVE-2015-1798",
      "id": "CVE-2015-1798",
      "initial_release_date": "2015-04-07T00:00:00+00:00",
      "product_status:fixed": "328",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "ntp: ntpd accepts unauthenticated packets with symmetric key crypto",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2015/cve-2015-1798.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-01T02:34:06Z",
      "cve": "CVE-2015-1798",
      "id": "CVE-2015-1798",
      "initial_release_date": "2023-02-15T05:21:22Z",
      "product_status:known_not_affected": "3",
      "product_status:recommended": "95",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2015-1798",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2015-1798.json",
      "version": "11"
    }
  }
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    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.