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Category:   Application (Generic)  >   Xpdf Vendors:   Glyph and Cog
Xpdf May Execute Shell Commands Embedded Within PDF Files
SecurityTracker Alert ID:  1006989
SecurityTracker URL:  http://securitytracker.com/id/1006989
CVE Reference:   CVE-2003-0434   (Links to External Site)
Date:  Jun 14 2003
Impact:   Execution of arbitrary code via network, User access via network

Version(s): 1.01
Description:   A vulnerability was reported in Xpdf. A remote user can create a malicious but valid PDF file that will cause arbitrary scripts to be executed when the target user clicks on a link in the PDF file.

Hack4Life reported vulnerabilities in Xpdf and Acrobat Reader based on information submitted by Martyn Gilmore to CERT.

It is reported that a remote user can embed shell commands within external-type hyperlinks. According to the report, the hyperlink will be passed by the application to the operating system using the 'sh -c' exec command. As a result, a malicious link can reportedly be crafted in the following form:

mailto:[address]`[malicious command]`

Impact:   A remote user can create a PDF file so that when a target user clicks on a hypertext link within the document, arbitrary commands will be executed on the target user's system with the privileges of the target user.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.foolabs.com/xpdf/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jul 24 2003 (Mandrake Issues Fix) Xpdf May Execute Shell Commands Embedded Within PDF Files
Mandrake has released a fix.
Sep 10 2003 (Sun Issues Fix for Sun Linux) Re: Xpdf May Execute Shell Commands Embedded Within PDF Files
Sun has issued a fix for Sun Linux.



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