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 Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Cups | Cups | - (including) | - (including) |
| Ubuntu_linux | Canonical | 14.04 (including) | 14.04 (including) |
| Ubuntu_linux | Canonical | 16.04 (including) | 16.04 (including) |
| Ubuntu_linux | Canonical | 17.10 (including) | 17.10 (including) |
| Ubuntu_linux | Canonical | 18.04 (including) | 18.04 (including) |
| Debian_linux | Debian | 8.0 (including) | 8.0 (including) |
| Debian_linux | Debian | 9.0 (including) | 9.0 (including) |
| Cups | Ubuntu | artful | * |
| Cups | Ubuntu | bionic | * |
| Cups | Ubuntu | devel | * |
| Cups | Ubuntu | esm-infra/bionic | * |
| Cups | Ubuntu | esm-infra/xenial | * |
| Cups | Ubuntu | trusty | * |
| Cups | Ubuntu | xenial | * |
References
- https://lists.debian.org/debian-lts-announce/2018/07/msg00014.html
- https://security.gentoo.org/glsa/201908-08
- https://usn.ubuntu.com/usn/usn-3713-1
- https://www.debian.org/security/2018/dsa-4243
- https://lists.debian.org/debian-lts-announce/2018/07/msg00014.html
- https://security.gentoo.org/glsa/201908-08
- https://usn.ubuntu.com/usn/usn-3713-1
- https://www.debian.org/security/2018/dsa-4243