dmcrypt-get-device, as shipped in the eject package of Debian and Ubuntu, does not check the return value of the (1) setuid or (2) setgid function, which might cause dmcrypt-get-device to execute code, which was intended to run as an unprivileged user, as root. This affects eject through 2.1.5+deb1+cvs20081104-13.1 on Debian, eject before 2.1.5+deb1+cvs20081104-13.1ubuntu0.16.10.1 on Ubuntu 16.10, eject before 2.1.5+deb1+cvs20081104-13.1ubuntu0.16.04.1 on Ubuntu 16.04 LTS, eject before 2.1.5+deb1+cvs20081104-13.1ubuntu0.14.04.1 on Ubuntu 14.04 LTS, and eject before 2.1.5+deb1+cvs20081104-9ubuntu0.1 on Ubuntu 12.04 LTS.
Weakness
The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ubuntu_linux | Canonical | 12.04 (including) | 12.04 (including) |
| Ubuntu_linux | Canonical | 14.04 (including) | 14.04 (including) |
| Ubuntu_linux | Canonical | 16.04 (including) | 16.04 (including) |
| Ubuntu_linux | Canonical | 16.10 (including) | 16.10 (including) |
| Eject | Ubuntu | devel | * |
| Eject | Ubuntu | esm-infra-legacy/trusty | * |
| Eject | Ubuntu | esm-infra/xenial | * |
| Eject | Ubuntu | precise | * |
| Eject | Ubuntu | trusty | * |
| Eject | Ubuntu | trusty/esm | * |
| Eject | Ubuntu | upstream | * |
| Eject | Ubuntu | vivid/stable-phone-overlay | * |
| Eject | Ubuntu | xenial | * |
| Eject | Ubuntu | yakkety | * |
| Eject | Ubuntu | zesty | * |
Potential Mitigations
References
- http://www.debian.org/security/2017/dsa-3823
- http://www.securityfocus.com/bid/97154
- https://launchpad.net/bugs/1673627
- https://www.ubuntu.com/usn/usn-3246-1/
- https://www.debian.org/security/2017/dsa-3823
- http://www.debian.org/security/2017/dsa-3823
- http://www.securityfocus.com/bid/97154
- https://launchpad.net/bugs/1673627
- https://www.ubuntu.com/usn/usn-3246-1/