The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does not properly check permissions for file creation in the upper filesystem directory, which allows local users to obtain root access by leveraging a configuration in which overlayfs is permitted in an arbitrary mount namespace.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ubuntu_linux | Canonical | * | 15.04 (including) |
| Linux | Ubuntu | esm-infra-legacy/trusty | * |
| Linux | Ubuntu | trusty | * |
| Linux | Ubuntu | trusty/esm | * |
| Linux | Ubuntu | utopic | * |
| Linux | Ubuntu | vivid | * |
| Linux | Ubuntu | vivid/ubuntu-core | * |
| Linux-flo | Ubuntu | trusty | * |
| Linux-goldfish | Ubuntu | trusty | * |
| Linux-grouper | Ubuntu | trusty | * |
| Linux-grouper | Ubuntu | utopic | * |
| Linux-linaro-omap | Ubuntu | precise | * |
| Linux-linaro-shared | Ubuntu | precise | * |
| Linux-linaro-vexpress | Ubuntu | precise | * |
| Linux-lts-raring | Ubuntu | precise | * |
| Linux-lts-trusty | Ubuntu | precise | * |
| Linux-lts-utopic | Ubuntu | trusty | * |
| Linux-lts-vivid | Ubuntu | trusty | * |
| Linux-maguro | Ubuntu | trusty | * |
| Linux-mako | Ubuntu | trusty | * |
| Linux-manta | Ubuntu | trusty | * |
| Linux-qcm-msm | Ubuntu | precise | * |
References
- http://seclists.org/oss-sec/2015/q2/717
- http://www.exploit-db.com/exploits/40688/
- http://www.securityfocus.com/bid/75206
- https://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-1328.html
- https://security-tracker.debian.org/tracker/CVE-2015-1328
- https://www.exploit-db.com/exploits/37292/
- http://seclists.org/oss-sec/2015/q2/717
- http://www.exploit-db.com/exploits/40688/
- http://www.securityfocus.com/bid/75206
- https://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-1328.html
- https://security-tracker.debian.org/tracker/CVE-2015-1328
- https://www.exploit-db.com/exploits/37292/