CVE-2019-14422 Information

Description

An issue was discovered in in TortoiseSVN 1.12.1. The Tsvncmd: URI handler allows a customised diff operation on Excel workbooks which could be used to open remote workbooks without protection from macro security settings to execute arbitrary code. A tsvncmd:command:diff?path:[file1]?path2:[file2] URI will execute a customised diff on [file1] and [file2] based on the file extension. For xls files it will execute the script diff-xls.js using wscript which will open the two files for analysis without any macro security warning. An attacker can exploit this by putting a macro virus in a network drive and force the victim to open the workbooks and execute the macro inside.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://seclists.org/fulldisclosure/2019/Aug/7 https://www.vulnerability-lab.com/get_content.php?id=2188

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8