Vulnerability Description
init_tmp in TeeJee.FileSystem.vala in Timeshift before 20.03 unsafely reuses a preexisting temporary directory in the predictable location /tmp/timeshift. It follows symlinks in this location or uses directories owned by unprivileged users. Because Timeshift also executes scripts under this location, an attacker can attempt to win a race condition to replace scripts created by Timeshift with attacker-controlled scripts. Upon success, an attacker-controlled script is executed with full root privileges. This logic is practically always triggered when Timeshift runs regardless of the command-line arguments used.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Timeshift Project | Timeshift | < 20.03 |
| Fedoraproject | Fedora | 30 |
| Canonical | Ubuntu Linux | 19.10 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2020/03/06/3Mailing ListThird Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1165802Issue TrackingThird Party Advisory
- https://github.com/teejee2008/timeshift/commit/335b3d5398079278b8f7094c77bfd148bPatchThird Party Advisory
- https://github.com/teejee2008/timeshift/releases/tag/v20.03Release NotesThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://usn.ubuntu.com/4312-1/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/03/06/3Mailing ListThird Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1165802Issue TrackingThird Party Advisory
- https://github.com/teejee2008/timeshift/commit/335b3d5398079278b8f7094c77bfd148bPatchThird Party Advisory
- https://github.com/teejee2008/timeshift/releases/tag/v20.03Release NotesThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2020-10174?
CVE-2020-10174 is a vulnerability with a CVSS score of 7.0 (HIGH). init_tmp in TeeJee.FileSystem.vala in Timeshift before 20.03 unsafely reuses a preexisting temporary directory in the predictable location /tmp/timeshift. It follows symlinks in this location or uses ...
How severe is CVE-2020-10174?
CVE-2020-10174 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-10174?
Check the references section above for vendor advisories and patch information. Affected products include: Timeshift Project Timeshift, Fedoraproject Fedora, Canonical Ubuntu Linux.