ubuntu-cve-2017-9445
Vulnerability from osv_ubuntu
Published
2017-06-27 00:00
Modified
2026-04-22 07:38
Summary
Details

In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and subsequently write arbitrary data beyond the end of it.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
high
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "systemd",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "229-4ubuntu19"
          },
          {
            "binary_name": "udev",
            "binary_version": "229-4ubuntu19"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@229-4ubuntu19?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "229-4ubuntu19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "225-1ubuntu9",
        "227-2ubuntu1",
        "227-2ubuntu2",
        "228-1ubuntu2",
        "228-2ubuntu1",
        "228-2ubuntu2",
        "228-3ubuntu1",
        "228-4ubuntu1",
        "228-4ubuntu2",
        "228-5ubuntu1",
        "228-5ubuntu2",
        "228-5ubuntu3",
        "228-6ubuntu1",
        "229-1ubuntu2",
        "229-1ubuntu4",
        "229-2ubuntu1",
        "229-3ubuntu1",
        "229-3ubuntu2",
        "229-4ubuntu1",
        "229-4ubuntu4",
        "229-4ubuntu5",
        "229-4ubuntu6",
        "229-4ubuntu7",
        "229-4ubuntu8",
        "229-4ubuntu10",
        "229-4ubuntu11",
        "229-4ubuntu12",
        "229-4ubuntu13",
        "229-4ubuntu16",
        "229-4ubuntu17"
      ]
    }
  ],
  "aliases": [],
  "details": "In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that\u0027s too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that\u0027s too small, and subsequently write arbitrary data beyond the end of it.",
  "id": "UBUNTU-CVE-2017-9445",
  "modified": "2026-04-22T07:38:16Z",
  "published": "2017-06-27T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2017-9445"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3341-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2017-9445"
    }
  ],
  "related": [
    "USN-3341-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "high",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2017-9445"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.