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Category:   Application (Web Browser)  >   Opera Vendors:   Opera Software
Opera Mail Client Bugs May Let Remote Users Spoof Attachment Types and Inject Arbitrary Scripting Code
SecurityTracker Alert ID:  1014943
SecurityTracker URL:  http://securitytracker.com/id/1014943
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Sep 20 2005
Impact:   Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8.02
Description:   A vulnerability was reported in Opera. A remote user may be able to spoof file types and cause a target user to execute arbitrary scripting code.

A remote user can send specially crafted e-mail that, when opened by the target user, may be able to invoke the 'file://' handler to open attached files directly from the target user's cache, without any warning to the target user.

A remote user can send an e-mail with a specially named attachment (that has a period appended to the filename) to spoof the file type. For example, an HTML file can be named to appear to be a different filetype (such as an image file type).

The vendor was notified on September 1, 2005.

Jakob Balle of Secunia Research discovered this vulnerability.

Impact:   A remote user may be able to spoof an attachment file type. If the target user chooses to open the file attachment, arbitrary scripting code may be executed on the target user's system.
Solution:   The vendor has issued a fixed version (8.50), available at:

http://www.opera.com/download/

Vendor URL:  www.opera.com/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  [Full-disclosure] Secunia Research: Opera Mail Client Attachment

====================================================================== 

                     Secunia Research 20/09/2005

   - Opera Mail Client Attachment Spoofing and Script Insertion -

====================================================================== 
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9

====================================================================== 
1) Affected Software 

Opera 8.02

Prior versions may also be affected.

====================================================================== 
2) Severity 

Rating: Moderately Critical
Impact: Script Insertion, Spoofing
Where:  From Remote

====================================================================== 
3) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in the Opera Mail
client, which can be exploited by a malicious person to conduct script
insertion attacks and to spoof the name of attached files.

1. Attached files are opened without any warnings directly from the
user's cache directory. This can be exploited to execute arbitrary 
JavaScript in context of "file://".

2. Normally, filename extensions are determined by the "Content-Type"
in Opera Mail. However, by appending an additional '.' to the end of
a filename, an HTML file could be spoofed to be e.g. "image.jpg.". 

The two vulnerabilities combined may be exploited to conduct script
insertion attacks if the user chooses to view an attachment named
e.g. "image.jpg." e.g. resulting in disclosure of local files.

====================================================================== 
4) Solution 

Update to version 8.50.
http://www.opera.com/download/

====================================================================== 
5) Time Table 

01/09/2005 - Initial vendor notification.
20/09/2005 - Public disclosure.

====================================================================== 
6) Credits 

Discovered by Jakob Balle, Secunia Research.

====================================================================== 
7) References

No references available.

====================================================================== 
8) About Secunia 

Secunia collects, validates, assesses, and writes advisories regarding 
all the latest software vulnerabilities disclosed to the public. These 
advisories are gathered in a publicly available database at the 
Secunia website: 

http://secunia.com/

Secunia offers services to our customers enabling them to receive all 
relevant vulnerability information to their specific system 
configuration. 

Secunia offers a FREE mailing list called Secunia Security Advisories: 

http://secunia.com/secunia_security_advisories/

====================================================================== 
9) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2005-42/advisory/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

======================================================================



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Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

 
 


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