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List:       koffice-devel
Subject:    DRAFT: KDE Security Advisory: KOffice PDF Import Filter
From:       Waldo Bastian <bastian () kde ! org>
Date:       2005-01-20 11:15:07
Message-ID: 200501201215.07638.bastian () kde ! org
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Please review.

Cheers,
Waldo


KDE Security Advisory: KOffice PDF Import Filter Vulnerability
Original Release Date: 2005-01-20
URL: http://www.kde.org/info/security/advisory-20050120-1.txt

0. References

        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-XXXX
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064
   http://www.idefense.com/application/poi/display?id=186&type=vulnerabilities


1. Systems affected:

        KOffice 1.3 up to including KOffice 1.3.5


2. Overview:

        The KOffice PDF Import Filter shares code with xpdf. xpdf contains
        a buffer overflow that can be triggered by a specially crafted
        PDF file.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CAN-2005-XXXX to this issue.


3. Impact:

        Remotely supplied pdf files can be used to execute arbitrary
        code on the client machine when the user opens such file in
        KOffice.


4. Solution:

        Source code patches have been made available which fix these
        vulnerabilities. Contact your OS vendor / binary package provider
        for information about how to obtain updated binary packages.


5. Patch:

        Patch for KOffice 1.3.5 is available from 
        ftp://ftp.kde.org/pub/kde/security_patches :

        5fa219238965d4d8f2f2bc9e53890b98  post-1.3.5-koffice.diff


6. Time line and credits:

        19/01/2005 KDE Security Team alerted by Carsten Lohrke
        19/01/2005 Patches from xpdf 3.00pl3 applied to KDE CVS and patches
                   prepared. 
        20/01/2005 Public disclosure.

-- 
bastian@kde.org   |   Free Novell Linux Desktop 9 Evaluation Download
bastian@suse.com  |   http://www.novell.com/products/desktop/eval.html

["post-1.3.5-koffice.diff" (text/x-diff)]

Index: filters/kword/pdf/xpdf/xpdf/XRef.cc
===================================================================
RCS file: /home/kde/koffice/filters/kword/pdf/xpdf/xpdf/XRef.cc,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -p -r1.6 -r1.7
--- filters/kword/pdf/xpdf/xpdf/XRef.cc	30 Oct 2004 16:35:33 -0000	1.6
+++ filters/kword/pdf/xpdf/xpdf/XRef.cc	19 Jan 2005 15:43:46 -0000	1.7
@@ -501,6 +501,9 @@ GBool XRef::checkEncrypted(GString *owne
 	} else {
 	  keyLength = 5;
 	}
+	if (keyLength > 16) {
+	  keyLength = 16;
+	}
 	permFlags = permissions.getInt();
 	if (encVersion >= 1 && encVersion <= 2 &&
 	    encRevision >= 2 && encRevision <= 3) {


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