Code Injection in Atlassian Sourcetree for Windows

1) Code Injection

EUVDB-ID: #VU18054

Risk: Medium

CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2018-20234

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation when processing filenames in Mercurial repositories. A remote attacker with permission to commit to a Mercurial repository can create a specially crafted filename and inject arbitrary arguments.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Sourcetree for Windows: 0.8b - 3.0.15

Sourcetree for macOS: 1.2.1 - 3.1.0

CPE2.3

• cpe:2.3:a:atlassian:sourcetree_for_windows:0.8b:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:sourcetree_for_windows:0.8.1b:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:sourcetree_for_windows:0.8.2b:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:sourcetree_for_macos:1.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:sourcetree_for_macos:1.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:sourcetree_for_macos:1.2.3:*:*:*:*:*:*:*

External links

https://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2019-03-06-966678691.html
https://packetstormsecurity.com/files/152173/Sourcetree-Git-Arbitrary-Code-Execution-URL-Handling.html
https://jira.atlassian.com/browse/SRCTREE-6391
https://seclists.org/bugtraq/2019/Mar/30

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.