Cisco WebEx Player Audio File Processing Arbitrary Code Execution Vulnerability
Threat Type:
Unintended Weakness: Arbitrary Code Execution
IntelliShield ID:
26210
Version:
1
First Published:
2012 June 27 16:26 GMT
Last Published:
2012 June 27 16:26 GMT
Port:
Not Available
CVE:
CVE-2012-3057
Urgency:
Unlikely Use
Credibility:
Confirmed
Severity:
Moderate Damage
Version Summary:
Cisco WebEx Player contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system. Updates are available.
Description
Cisco WebEx Player contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.
The vulnerability is due to improper boundary checks on audio files by the Cisco WebEx Player. An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to view a malicious website. If successful, the attacker could execute arbitrary code on the system with the privileges of the user.
Cisco has confirmed the vulnerability in a security advisory and released software updates.
Warning Indicators
The following versions of Cisco WebEx Players are vulnerable when running on Microsoft Windows, Apple Mac OS X, and Linux platforms:
Client builds T28 L 10N
Client builds T27 LD SP32 CP1 and prior
Client builds T27 LC SP25 EP10 and prior
IntelliShield Analysis
To exploit the vulnerability, the attacker may provide a file to the user and persuade the user to open or execute the file by using misleading language or instructions.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on a targeted system with the privileges of the user. If the user holds elevated privileges, the attacker could completely compromise the targeted system.
Technical Information
The vulnerability is due to improper boundary checks on audio files by the Cisco WebEx Player when processing WebEx Recording Format .wrf files.
An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to view a malicious .wrf file. When processed, the file could trigger a buffer overflow that corrupts memory. The attacker could use the memory corruption to execute arbitrary code on the system with the privileges of the user.
Safeguards
Administrators are advised to apply the appropriate updates.
Users are advised not to open e-mail messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.
Users are advised not to open media files from suspicious or unrecognized sources. If users cannot verify that media files are safe, they are advised not to open them.
Administrators are advised to monitor critical systems.
Patches/Software
Cisco recommends that users upgrade to the current version of the WebEx WRF Player and Recording Editor, which is available at the following link: WebEx
Signatures
Cisco Systems Cisco Intrusion Prevention System (IPS) 6.0
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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.
