full-disclosure - [CVE-2012-3238] Astaro Security Gateway <= v8.304 Persistent Cross-Site Scripting Vulnerability

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Date: Sun, 10 Jun 2012 14:15:59 +0200
From: Inshell Security <info@...hell.net>
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: [CVE-2012-3238] Astaro Security Gateway <= v8.304
 Persistent Cross-Site Scripting Vulnerability

Inshell Security Advisory
http://www.inshell.net/


1. ADVISORY INFORMATION
-----------------------
Product:        Astaro Security Gateway
Vendor URL:     www.astaro.com / www.sophos.com
Type:           Cross-site Scripting [CWE-79]
Date found:     2012-05-11
Date published: 2012-06-10
CVSSv2 Score:   3,5 (AV:N/AC:M/Au:S/C:N/I:P/A:N)
CVE:            CVE-2012-3238


2. CREDITS
----------
This vulnerability was discovered and researched by Julien Ahrens from
Inshell Security.


3. VERSIONS AFFECTED
--------------------
Astaro Security Gateway v8.304, older versions are affected too.


4. VULNERABILITY DESCRIPTION
----------------------------
A Persistent Cross-Site Scripting Vulnerability has been found on the
Astaro Security Gateway product.

The vulnerability is located in the backup-function of the software:

Vulnerable Module(s):
+Management -> Backup/Restore
 Parameter: "Comment (optional)"

The input field "Comment (optional)" is shown on the "Available backups"
view after successful creation of a new backup and is also included into
the backup-file itself.

Due to improper input - validation of this input field, an attacker
could permanently inject arbitrary code with required user interaction
into the context of the firewall-interface. Successful exploitation of
the vulnerability allows for example cookie theft, session hijacking or
server side context manipulation.


5. PROOF-OF-CONCEPT (CODE / EXPLOIT)
------------------------------------
An attacker needs to force the victim to import an arbitrary
backup-file. The victim does not need to apply the backup, only the
import is required to exploit the vulnerability.

For further information (screenshots, PoCs etc.) visit:
http://security.inshell.net/advisory/27


6. SOLUTION
-----------
Update to v8.305.


7. REPORT TIMELINE
------------------
2012-05-12: Initial notification sent to vendor
2012-05-12: Vendor response
2012-05-12: Vulnerability details reported to vendor
2012-05-15: Vendor acknowledgement
2012-05-31: Vendor releases Update / Fix
2012-06-10: Coordinated public release of advisory


8. REFERENCES
-------------
http://www.astaro.com/en-uk/blog/up2date/8305
http://security.inshell.net

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