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Citrix NetScaler VPX Cross Site Scripting

Citrix NetScaler VPX Cross Site Scripting
Posted Mar 20, 2015
Authored by Han Sahin

It was discovered that the help pages of Citrix VPX are vulnerable to cross site scripting.

tags | exploit, xss
SHA-256 | d441a8929d46f3b81888279baadee2699e3507b40eda951a86945b935b33baac

Citrix NetScaler VPX Cross Site Scripting

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Citrix NetScaler VPX help pages are vulnerable to Cross-Site Scripting
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Han Sahin, August 2014

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Abstract
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It was discovered that the help pages of Citrix VPX are vulnerable to
Cross-Site Scripting. This issue allows attackers to perform a wide
variety of actions, such as stealing the victim's session token or login
credentials, performing arbitrary actions on the victim's behalf, and
logging their keystrokes.

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Tested version
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This issue was discovered in Citrix NetScaler VPX NSVPX-ESX-10.5-50.10,
other versions may also be vulnerable.

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Fix
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Citrix reports that this vulnerability is fixed in NetScaler 10.5 build
52.8nc.

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Details
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https://www.securify.nl/advisory/SFY20140807/citrix_netscaler_vpx_help_pages_are_vulnerable_to_cross_site_scripting.html

This issue exists because the value of the searchQuery URL parameter is assigned client-side to contentDiv.innerHTML (DOM-based Cross-Site Scripting), for example:

https://<target>/help/rt/large_search.html?searchQuery=<h1>Reset your password below:<h1><iframe src='http://www.evil.com'/>&type=ctxTV

Tricking a victim into visiting a specially crafted URL allows attackers to run arbitrary client-side scripting code within the victim's browser. The attacker-supplied code can perform a wide variety of actions, such as stealing the victim's session token or login credentials, performing arbitrary actions on the victim's behalf, and logging their keystrokes.
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