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CVE-2018-6553 (GCVE-0-2018-6553)

Vulnerability from cvelistv5 – Published: 2018-08-10 15:00 – Updated: 2024-09-16 19:51
VLAI
Title
AppArmor cupsd Sandbox Bypass Due to Use of Hard Links
Summary
The CUPS AppArmor profile incorrectly confined the dnssd backend due to use of hard links. A local attacker could possibly use this issue to escape confinement. This flaw affects versions prior to 2.2.7-1ubuntu2.1 in Ubuntu 18.04 LTS, prior to 2.2.4-7ubuntu3.1 in Ubuntu 17.10, prior to 2.1.3-4ubuntu0.5 in Ubuntu 16.04 LTS, and prior to 1.7.2-0ubuntu1.10 in Ubuntu 14.04 LTS.
Severity
8.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • Escape from sandbox confinement
Assigner
References
URL Tags
https://usn.ubuntu.com/usn/usn-3713-1 vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2018/dsa-4243 vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2018… mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/201908-08 vendor-advisoryx_refsource_GENTOO
Impacted products
Vendor Product Version CPE status
n/a cups Affected: unspecified , < 2.2.7-1ubuntu2.1 (custom)
n/a cups Affected: unspecified , < 2.2.4-7ubuntu3.1 (custom)
n/a cups Affected: unspecified , < 2.1.3-4ubuntu0.5 (custom)
n/a cups Affected: unspecified , < 1.7.2-0ubuntu1.10 (custom)
Date Public
2018-07-11 00:00
Credits
Dan Bastone
Show details on NVD website
To clipboard 

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            "url": "https://www.debian.org/security/2018/dsa-4243"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Issue Tracking",
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2018/07/msg00014.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://security.gentoo.org/glsa/201908-08"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://usn.ubuntu.com/usn/usn-3713-1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2018/dsa-4243"
          }
        ],
        "sourceIdentifier": "security@ubuntu.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2025-11-21T16:42:09+00:00",
      "cve": "CVE-2018-6553",
      "id": "CVE-2018-6553",
      "initial_release_date": "2018-05-09T00:00:00+00:00",
      "product_status:known_not_affected": "24",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "cups: AppArmor cupsd Sandbox Bypass Due to Use of Hard Links",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-6553.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-31T08:49:03Z",
      "cve": "CVE-2018-6553",
      "id": "CVE-2018-6553",
      "initial_release_date": "2023-02-15T04:30:20Z",
      "product_status:known_not_affected": "154",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2018-6553",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-6553.json",
      "version": "12"
    }
  }
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.