[security-alerts] FW: [SA20442] Firefox File Upload Form Keystroke Event Cancel Vulnerability

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> 
> TITLE:
> Firefox File Upload Form Keystroke Event Cancel Vulnerability
> 
> SECUNIA ADVISORY ID:
> SA20442
> 
> VERIFY ADVISORY:
> http://secunia.com/advisories/20442/
> 
> CRITICAL:
> Less critical
> 
> IMPACT:
> Exposure of sensitive information
> 
> WHERE:
> From remote
> 
> SOFTWARE:
> Mozilla Firefox 1.x
> http://secunia.com/product/4227/
> 
> DESCRIPTION:
> Charles McAuley has reported a vulnerability in Firefox, which can be
> exploited by malicious people to trick users into disclosing sensitive
> information.
> 
> The vulnerability is caused due to a design error where a script can
> cancel certain keystroke events when entering text. This can be
> exploited to trick a user into typing a filename in a file upload
> input field by changing focus and cancel the "OnKeyPress" JavaScript
> event on certain characters.
> 
> Successful exploitation allows an arbitrary file on the user's system
> to be uploaded to a malicious web site, but requires that the user
> types a text containing the characters of the filename.
> 
> The vulnerability has been confirmed in version 1.5.0.4. Other
> versions may also be affected.
> 
> SOLUTION:
> Disable JavaScript support.
> 
> Do not enter suspicious text when visiting untrusted web sites.
> 
> PROVIDED AND/OR DISCOVERED BY:
> Charles McAuley
> 
> NOTE: A variant of this vulnerability was reported in a Mozilla
> Bugzilla bug entry back in year 2000.
> 
> ORIGINAL ADVISORY:
> Charles McAuley:
> http://lists.grok.org.uk/pipermail/full-disclosure/2006-June/0
46610.html
>