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Atlassian SourceTree 2.5c Client URL Handler Command Injection

Atlassian SourceTree 2.5c Client URL Handler Command Injection
Posted May 4, 2017
Authored by redrain

Atlassian SourceTree Client version 2.5c and prior contain a client URL handler command injection vulnerability that allows attackers to execute specially crafted sourcetree:// commands with arbitrary arguments on multiple platforms.

tags | exploit, advisory, arbitrary, local, vulnerability
systems | linux, windows, apple, osx
MD5 | dc5158c6d9969d6de9329a467ec14160

Atlassian SourceTree 2.5c Client URL Handler Command Injection

Change Mirror Download

Author: redrain, hongyu-s[at]360.cn
Date: 2017-03-02
Version:2.5c and prior
Platform: macOS, Windows, Linux Desktop
Site: https://www.sourcetreeapp.com
Vendor: Atlassian
Vendor Notified: 2017-03-02


Technical Details:
========================================

SourceTree v2.5c and prior are affected by a command injection in the handling of sourcetree:// scheme.
The cloneRepo action with !(r)ext!-is base on git-remote-ext, The git team's description of the bug was:
Some protocols (like git-remote-ext) can execute arbitrary code found in the URL.
PoC:
sourcetree://cloneRepo/ext::[command injection]
Even attacker can exploit it through the browser
<html>
<head></head>
<body>
<a href=sourcetree://checkoutRef/ext::id>a</a>
</body>
</html>
There is a simple demo video:
https://youtu.be/SQ1_Ht-0Bdo


Other:
============================================
and there is the last bugtrack I reported:


```
Activity
Your request status changed to Resolved with resolution Tracked Elsewhere.
03/Mar/17 5:35 PMLATEST
Alexander Minozhenko
Alexander Minozhenko03/Mar/17 5:34 PM
Hi rootredrain,
Thank you for sending this notification to Atlassian. This is indeed a vulnerability and an issue has been filed on an internal tracker.
The issue is SRCTREE-4632. Unfortunately, this issue is not accessible externally, so you will not be able to monitor its progress. Feel free to check with us for updates.
redrain
redrain02/Mar/17 5:43 PM
sourcetree_vuln.7z (9.62 MB)
Details02/Mar/17 5:43 PM
Product or Service
Other
Product Version
2.4.1a and earlier
Description
SourceTree v2.4.1a and earlier are affected by a command injection in the handling of sourcetree:// scheme.
The cloneRepo action with !(r)ext!- is base on git-remote-ext, The git team!-s description of the bug was:
Some protocols (like git-remote-ext) can execute arbitrary code found in the URL.
PoC:
sourcetree://cloneRepo/ext::[command injection]
Even attacker can exploit it through the browser
there is a simple demo in the attachment.


Regards,
redrain

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