ubuntu-cve-2020-13696
Vulnerability from osv_ubuntu
Published
2020-06-08 17:15
Modified
2025-10-24 04:48
Summary
Details

An issue was discovered in LinuxTV xawtv before 3.107. The function dev_open() in v4l-conf.c does not perform sufficient checks to prevent an unprivileged caller of the program from opening unintended filesystem paths. This allows a local attacker with access to the v4l-conf setuid-root program to test for the existence of arbitrary files and to trigger an open on arbitrary files with mode O_RDWR. To achieve this, relative path components need to be added to the device path, as demonstrated by a v4l-conf -c /dev/../root/.bash_history command.

Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "alevtd",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "fbtv",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "pia",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "radio",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "scantv",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "streamer",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "ttv",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "v4l-conf",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "webcam",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "xawtv",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "xawtv-plugin-qt",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "xawtv-plugins",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          },
          {
            "binary_name": "xawtv-tools",
            "binary_version": "3.103-3+deb8u1build0.16.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "xawtv",
        "purl": "pkg:deb/ubuntu/xawtv@3.103-3+deb8u1build0.16.04.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.103-3+deb8u1build0.16.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.103-3",
        "3.103-3build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "alevtd",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "fbtv",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "pia",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "radio",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "scantv",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "streamer",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "ttv",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "v4l-conf",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "webcam",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "xawtv",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "xawtv-plugin-qt",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "xawtv-plugins",
            "binary_version": "3.103-4build1"
          },
          {
            "binary_name": "xawtv-tools",
            "binary_version": "3.103-4build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "xawtv",
        "purl": "pkg:deb/ubuntu/xawtv@3.103-4build1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.103-4build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "alevtd",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "fbtv",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "pia",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "radio",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "scantv",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "streamer",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "ttv",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "v4l-conf",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "webcam",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "xawtv",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "xawtv-plugin-qt",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "xawtv-plugins",
            "binary_version": "3.106-1"
          },
          {
            "binary_name": "xawtv-tools",
            "binary_version": "3.106-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "xawtv",
        "purl": "pkg:deb/ubuntu/xawtv@3.106-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.106-1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in LinuxTV xawtv before 3.107. The function dev_open() in v4l-conf.c does not perform sufficient checks to prevent an unprivileged caller of the program from opening unintended filesystem paths. This allows a local attacker with access to the v4l-conf setuid-root program to test for the existence of arbitrary files and to trigger an open on arbitrary files with mode O_RDWR. To achieve this, relative path components need to be added to the device path, as demonstrated by a v4l-conf -c /dev/../root/.bash_history command.",
  "id": "UBUNTU-CVE-2020-13696",
  "modified": "2025-10-24T04:48:30Z",
  "published": "2020-06-08T17:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-13696"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2020/06/04/6"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2020/06/04/6/1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4518-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-13696"
    }
  ],
  "related": [
    "USN-4518-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-13696"
  ]
}



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