CVEvulnerability

CVE-2020-10174

7.0 HIGH Published 2020-03-05 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-03-05
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C
Weaknesses
CWE-362, CWE-59

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.

Affected configurations

• timeshift project timeshift (< 20.03) • fedoraproject fedora 30 • fedoraproject fedora 31 • fedoraproject fedora 32 • canonical ubuntu linux 19.10

Related

Weakness · CWE (2)

  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness
  • CWE-59 Improper Link Resolution Before File Access weakness

References