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AUSCERT External Security Bulletin Redistribution
ESB-2015.1332
Cisco Email Security Appliance Cross-Site Scripting Vulnerability
18 May 2015
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AusCERT Security Bulletin Summary
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Product: Cisco Email Security Appliance
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Resolution: Mitigation
CVE Names: CVE-2015-0734
Original Bulletin:
http://tools.cisco.com/security/center/viewAlert.x?alertId=38866
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Vulnerability Alert
Cisco Email Security Appliance Cross-Site Scripting Vulnerability
Threat Type: CWE-79: Cross-Site Scripting (XSS)
IntelliShield ID: 38866
Version: 1
First Published: 2015 May 14 16:49 GMT
Last Published: 2015 May 14 16:49 GMT
Port: Not available
CVE: CVE-2015-0734
Urgency: Unlikely Use
Credibility: Confirmed
Severity: Mild Damage
CVSS Base: 4.3
CVSS Temporal: 4.1
Version Summary: Cisco Email Security Appliance contains a vulnerability that
could allow an unauthenticated, remote attacker to conduct a cross-site
scripting attack. Updates are not available.
Description
A vulnerability in the Cisco Email Security Appliance (ESA) could allow an
unauthenticated, remote attacker to perform a cross-site scripting (XSS)
attack.
The vulnerability is due to insufficient input validation of some parameters
passed via HTTP GET or POST methods. An attacker could exploit this
vulnerability by intercepting the user packets and injecting malicious code. A
successful exploit could allow the attacker to execute arbitrary script code
in the context of the affected site or allow the attacker to access sensitive
browser-based information.
Cisco has confirmed the vulnerability; however, software updates are not
available.
Warning Indicators
At the time this alert was first published, Cisco ESA release 8.5.6-106 was
vulnerable. Later releases of Cisco ESA may also be vulnerable.
IntelliShield Analysis
To exploit the vulnerability, the attacker may provide a link that directs a
user to a malicious site and use misleading language or instructions to
persuade the user to follow the provided link.
Vendor Announcements
Cisco has released bug ID CSCut87743 for registered users, which contains
additional details and an up-to-date list of affected product versions.
Impact
An unauthenticated, remote attacker could exploit this vulnerability to
execute arbitrary code in the user's browser session in the context of the
affected site. A successful exploit could allow the attacker to access
sensitive browser-based information such as authentication cookies and
recently submitted data.
Technical Information
The vulnerability is due to insufficient input validation of some parameters
passed to an affected device via HTTP GET or POST methods.
An unauthenticated, remote attacker could exploit this vulnerability by
intercepting the user packets and injecting malicious code. A successful
exploit could allow the attacker to execute arbitrary script code in the
context of the affected site or allow the attacker to access sensitive
browser-based information.
Safeguards
Administrators are advised to contact the vendor regarding future updates and
releases.
Users should verify that unsolicited links are safe to follow.
For additional information about XSS attacks and the methods used to exploit
these vulnerabilities, see the Cisco Applied Mitigation Bulletin Understanding
Cross-Site Scripting (XSS) Threat Vectors.
Administrators are advised to monitor affected systems.
Patches/Software
Software updates are not available.
Alert History
Initial Release
Product Sets
The security vulnerability applies to the following combinations of products.
Primary Products:
Cisco Cisco Email Security Appliance (ESA) 8.5 .6-106
Associated Products:
N/A
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are
highlighted by analysts in the Cisco Threat Operations Center and represent a
subset of the comprehensive content that is available through Cisco Security
IntelliShield Alert Manager Service. This customizable threat and
vulnerability alert service provides security staff with access to timely,
accurate, and credible information about threats and vulnerabilities that may
affect their environment.
LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual
users; users may value alerts differently based upon their network
configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED
THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED
THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION
IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE
TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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