CVE-2018-6553
Publication date 11 July 2018
Last updated 25 August 2025
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| cups | 18.04 LTS bionic |
Fixed 2.2.7-1ubuntu2.1
|
| 16.04 LTS xenial |
Fixed 2.1.3-4ubuntu0.5
|
|
| 14.04 LTS trusty |
Fixed 1.7.2-0ubuntu1.10
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
8.8 · High
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-3713-1
- CUPS vulnerabilities
- 11 July 2018