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Category:   Application (Generic)  >   Xpdf Vendors:   Glyph and Cog
(Sun Issues Fix for Sun Linux) Re: Xpdf May Execute Shell Commands Embedded Within PDF Files
SecurityTracker Alert ID:  1007667
SecurityTracker URL:  http://securitytracker.com/id/1007667
CVE Reference:   CVE-2003-0434   (Links to External Site)
Date:  Sep 10 2003
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

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:   Sun has issued a fix for Sun Linux 5.0 (LX50) in xpdf-0.92-10.i386.rpm or later, available at:

http://sunsolve.sun.com/patches/linux/security.html

Vendor URL:  www.foolabs.com/xpdf/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Sun)
Underlying OS Comments:  5.0

Message History:   This archive entry is a follow-up to the message listed below.
Jun 14 2003 Xpdf May Execute Shell Commands Embedded Within PDF Files



 Source Message Contents

Subject:  http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F55601


55601   On Sun Linux, an Unauthorized Remote User May be Able to Execute Arbitrary 
Commands With the "xpdf" User's Privileges   4 Sep 2003

CVE CAN-2003-0434

Sun Linux 5.0 (LX50) with xpdf-0.92-9 or earlier is affected.

This issue is addressed in the following releases:

Sun Linux

Sun Linux 5.0 (LX50) with xpdf-0.92-10.i386.rpm or later
Sun Linux patches are available at: http://sunsolve.sun.com/patches/linux/security.html.



-----

Sun Alert ID: 55601
Synopsis: On Sun Linux, an Unauthorized Remote User May be Able to Execute Arbitrary 
Commands With the "xpdf" User's Privileges
Category: Security
Product: Sun Linux
BugIDs: 4880560
Avoidance: Patch, Workaround
State: Resolved
Date Released: 02-Jul-2003, 04-Sep-2003
Date Closed: 04-Sep-2003
Date Modified: 04-Sep-2003



 
 


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