EUVD-2025-21005CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Lifecycle Timeline
4Description
Gitk is a Tcl/Tk based Git history browser. Starting with 1.7.0, when a user clones an untrusted repository and runs gitk without additional command arguments, files for which the user has write permission can be created and truncated. The option Support per-file encoding must have been enabled before in Gitk's Preferences. This option is disabled by default. The same happens when Show origin of this line is used in the main window (regardless of whether Support per-file encoding is enabled or not). This vulnerability is fixed in 2.43.7, 2.44.4, 2.45.4, 2.46.4, 2.47.3, 2.48.2, 2.49.1, and 2.50.1.
Analysis
Gitk is a Tcl/Tk based Git history browser. Starting with 1.7.0, when a user clones an untrusted repository and runs gitk without additional command arguments, files for which the user has write permission can be created and truncated. The option Support per-file encoding must have been enabled before in Gitk's Preferences. This option is disabled by default. The same happens when Show origin of this line is used in the main window (regardless of whether Support per-file encoding is enabled or not). This vulnerability is fixed in 2.43.7, 2.44.4, 2.45.4, 2.46.4, 2.47.3, 2.48.2, 2.49.1, and 2.50.1.
Technical Context
Command injection allows an attacker to execute arbitrary OS commands on the host system through a vulnerable application that passes user input to system shells. This vulnerability is classified as OS Command Injection (CWE-78).
Remediation
Avoid passing user input to system commands. Use language-specific APIs instead of shell commands. If unavoidable, use strict input validation and escaping.
Priority Score
Vendor Status
Ubuntu
Priority: Medium| Release | Status | Version |
|---|---|---|
| noble | released | 1:2.43.0-1ubuntu7.3 |
| oracular | released | 1:2.45.2-1ubuntu1.2 |
| plucky | released | 1:2.48.1-0ubuntu1.1 |
| upstream | released | 2.43.7 |
| bionic | released | 1:2.17.1-1ubuntu0.18+esm4 |
| focal | released | 1:2.25.1-1ubuntu3.14+esm3 |
| jammy | released | 1:2.34.1-1ubuntu1.15 |
| xenial | released | 1:2.7.4-0ubuntu1.10+esm11 |
Debian
Bug #1108983| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | fixed | 1:2.30.2-1+deb11u5 | - |
| bullseye (security) | fixed | 1:2.30.2-1+deb11u5 | - |
| bookworm | vulnerable | 1:2.39.5-0+deb12u3 | - |
| bookworm (security) | vulnerable | 1:2.39.5-0+deb12u2 | - |
| trixie | fixed | 1:2.47.3-0+deb13u1 | - |
| forky | fixed | 1:2.51.0-1 | - |
| sid | fixed | 1:2.53.0-1 | - |
| (unstable) | fixed | 1:2.50.1-0.1 | - |
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External POC / Exploit Code
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