full-disclosure - CVE-2013-1643 - Unauthorised Access To Other Users Email Messages in Symantec PGP Universal Web Messenger

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Message-ID: <52FDFCFD.1050507@portcullis-security.com>
Date: Fri, 14 Feb 2014 11:24:45 +0000
From: Portcullis Advisories <advisories@...tcullis-security.com>
To: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk, 
 vuln@...unia.com, moderators@...db.org
Subject: CVE-2013-1643 - Unauthorised Access To Other
 Users Email Messages in Symantec PGP Universal Web Messenger

Vulnerability title: Unauthorised Access To Other Users Email Messages
in Symantec PGP Universal Web Messenger
CVE: CVE-2013-1643
Vendor: Symantec
Product: PGP Universal Web Messenger
Affected version: All Prior to 3.3.2
Fixed version: 3.3.2
Reported by: Richard O'Donnell

Details:

Authenticated Web Messenger users are able to view other users email
messages, by following these steps:

1) Log into the Web Messenger console
2) View the list of sent emails
3) Click on any of the sent emails
4) Click on the `Print' option and then copy the URL from the page that
appears.

The URL will look similar to this:

https://x.x.x.x/b/ps.e?sid=BoomerangMail:72e56j3a-a3r6-5d43-6ef4-aae9c23422ca&showScrollbars=true&dialogId=SentPrintableView1747635619&OWASP_CSRFTOKEN=M22N-J4L3-R3T2-P1AZ-TP1Q-TEFG-IUGH-N6EF

5) Using this URL, brute-force the following part of the `sid' parameter:

    72e56j3a-a3r6-5d43-6ef4-aae9c23422ca

6) Upon identifying a valid value, access to the corresponding email
message will be obtained.

Although there is a risk of obtaining unauthorised access to another
users email, the likelihood of successfully brute-forcing a correct
`sid' value is considered low, due to its complexity.

It is also noted that encryption of messages was not enabled when this
issue was identified and no additional testing was performed with this
option enabled.

Further details at:
http://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2013-1643/

Copyright:
Copyright (c) Portcullis Computer Security Limited 2014, All rights
reserved worldwide. Permission is hereby granted for the electronic
redistribution of this information. It is not to be edited or altered in
any way without the express written consent of Portcullis Computer
Security Limited.

Disclaimer:
The information herein contained may change without notice. Use of this
information constitutes acceptance for use in an AS IS condition. There
are NO warranties, implied or otherwise, with regard to this information
or its use. Any use of this information is at the user's risk. In no
event shall the author/distributor (Portcullis Computer Security
Limited) be held liable for any damages whatsoever arising out of or in
connection with the use or spread of this information.

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