AppArmor cupsd Sandbox Bypass Due to Use of Hard Links
CVE-2018-6553
8.8HIGH
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.
Affected Version(s)
cups < 2.2.7-1ubuntu2.1
cups < 2.2.4-7ubuntu3.1
cups < 2.1.3-4ubuntu0.5
References
CVSS V3.1
Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed
Timeline
Vulnerability published
Vulnerability Reserved
Collectors
NVD DatabaseMitre Database
Credit
Dan Bastone