Vulnerability identifier: #VU12313

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-5226

CWE-ID: CWE-88

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Sourcetree for Windows
Universal components / Libraries / Software for developers

Vendor: Atlassian

Description
The vulnerability allows a remote unauthenticated attacker to execute arbitrary code on the target system.

The weakness exists due to an argument injection via Mercurial repository tag name that is going to be deleted. A remote attacker with permission to create a tag on a Mercurial repository linked in Sourcetree for Windows can trick the victim into opening a specially crafted file and execute arbitrary code.

Successful exploitation on the vulnerability may result in system compromise.

Mitigation
Update to version 2.5.5.

Vulnerable software versions

Sourcetree for Windows: 2.0.20.1 - 2.4.8

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External links
http://jira.atlassian.com/browse/SRCTREEWIN-8509
http://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-04-25-949230609.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.