ubuntu-cve-2018-6836
Vulnerability from osv_ubuntu
Published
2018-02-08 07:29
Modified
2026-04-22 07:38
Summary
Details

The netmonrec_comment_destroy function in wiretap/netmon.c in Wireshark through 2.4.4 performs a free operation on an uninitialized memory address, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact.

Severity
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libwireshark-data",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "libwireshark11",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "libwiretap8",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "libwscodecs2",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "libwsutil9",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "tshark",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "wireshark",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "wireshark-common",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "wireshark-gtk",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          },
          {
            "binary_name": "wireshark-qt",
            "binary_version": "2.6.3-1~ubuntu14.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "wireshark",
        "purl": "pkg:deb/ubuntu/wireshark@2.6.3-1~ubuntu14.04.1?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.3-1~ubuntu14.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.2-1",
        "1.10.3-1",
        "1.10.5-1ubuntu1",
        "1.10.5-2",
        "1.10.6-1",
        "1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libwireshark-data",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "libwireshark11",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "libwiretap8",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "libwscodecs2",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "libwsutil9",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "tshark",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "wireshark",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "wireshark-common",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "wireshark-gtk",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          },
          {
            "binary_name": "wireshark-qt",
            "binary_version": "2.6.3-1~ubuntu16.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "wireshark",
        "purl": "pkg:deb/ubuntu/wireshark@2.6.3-1~ubuntu16.04.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.3-1~ubuntu16.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12.7+g7fc8978-1",
        "1.12.8+g5b6e543-2",
        "2.0.1+g59ea380-3build1",
        "2.0.2+ga16e22e-1",
        "2.2.6+g32dac6a-2ubuntu0.16.04"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libwireshark-data",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "libwireshark11",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "libwiretap8",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "libwscodecs2",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "libwsutil9",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "tshark",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "wireshark",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "wireshark-common",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "wireshark-gtk",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          },
          {
            "binary_name": "wireshark-qt",
            "binary_version": "2.6.3-1~ubuntu18.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "wireshark",
        "purl": "pkg:deb/ubuntu/wireshark@2.6.3-1~ubuntu18.04.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.3-1~ubuntu18.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.2-1",
        "2.4.3-1",
        "2.4.4-1",
        "2.4.5-1"
      ]
    }
  ],
  "aliases": [],
  "details": "The netmonrec_comment_destroy function in wiretap/netmon.c in Wireshark through 2.4.4 performs a free operation on an uninitialized memory address, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact.",
  "id": "UBUNTU-CVE-2018-6836",
  "modified": "2026-04-22T07:38:34Z",
  "published": "2018-02-08T07:29:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-6836"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14397"
    },
    {
      "type": "REPORT",
      "url": "https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=28960d79cca262ac6b974f339697b299a1e28fef"
    },
    {
      "type": "REPORT",
      "url": "https://code.wireshark.org/review/#/c/25660/"
    },
    {
      "type": "REPORT",
      "url": "https://code.wireshark.org/review/#/c/25660/2/wiretap/netmon.c"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-6836"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2018-6836"
  ]
}



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