usn-4512-1
Vulnerability from osv_ubuntu
Published
2020-09-17 11:31
Modified
2026-04-22 07:36
Summary
util-linux vulnerability
Details

It was discovered that the umount bash completion script shipped in util-linux incorrectly handled certain mountpoints. If a local attacker were able to create arbitrary mountpoints, another user could be tricked into executing arbitrary code when attempting to run the umount command with bash completion.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2018-7738",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "negligible",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bsdutils",
            "binary_version": "1:2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "fdisk",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "libblkid1",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "libfdisk1",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "libmount1",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "libsmartcols1",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "libuuid1",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "mount",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "rfkill",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "setpriv",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "util-linux",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "util-linux-locales",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          },
          {
            "binary_name": "uuid-runtime",
            "binary_version": "2.31.1-0.4ubuntu3.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "util-linux",
        "purl": "pkg:deb/ubuntu/util-linux@2.31.1-0.4ubuntu3.7?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.31.1-0.4ubuntu3.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.30.1-0ubuntu4",
        "2.30.2-0.1ubuntu1",
        "2.30.2-0.1ubuntu2",
        "2.30.2-0.1ubuntu3",
        "2.31.1-0.4ubuntu2",
        "2.31.1-0.4ubuntu3",
        "2.31.1-0.4ubuntu3.1",
        "2.31.1-0.4ubuntu3.2",
        "2.31.1-0.4ubuntu3.3",
        "2.31.1-0.4ubuntu3.4",
        "2.31.1-0.4ubuntu3.5",
        "2.31.1-0.4ubuntu3.6"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that the umount bash completion script shipped in\nutil-linux incorrectly handled certain mountpoints. If a local attacker\nwere able to create arbitrary mountpoints, another user could be tricked\ninto executing arbitrary code when attempting to run the umount command\nwith bash completion.\n",
  "id": "USN-4512-1",
  "modified": "2026-04-22T07:36:39Z",
  "published": "2020-09-17T11:31:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4512-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-7738"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "util-linux vulnerability",
  "upstream": [
    "UBUNTU-CVE-2018-7738"
  ]
}



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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 exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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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.