UBUNTU-CVE-2018-6557

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Source
https://ubuntu.com/security/CVE-2018-6557
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6557.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-6557
Upstream
Downstream
Related
Published
2018-08-21T00:00:00Z
Modified
2026-02-04T04:11:48.122021Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 7.0 (High) CVSS_V3 - CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. A local attacker could use this issue to cause a denial of service, or possibly escalate privileges if kernel symlink restrictions were disabled.

References

Affected packages

Ubuntu:18.04:LTS / base-files

Package

Name
base-files
Purl
pkg:deb/ubuntu/base-files@10.1ubuntu2.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
10.1ubuntu2.2

Affected versions

9.*
9.6ubuntu102
Other
10ubuntu1
10.*
10.1ubuntu1
10.1ubuntu2
10.1ubuntu2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "10.1ubuntu2.2",
            "binary_name": "base-files"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6557.json"