Cisco WebEx Recording Format Player JPEG DHT Chunk Stack Buffer Overflow Vulnerability
Threat Type:
Unintended Weakness: Buffer Overflow
IntelliShield ID:
26207
Version:
1
First Published:
2012 June 27 16:18 GMT
Last Published:
2012 June 27 16:18 GMT
Port:
Not Available
CVE:
CVE-2012-3055
Urgency:
Unlikely Use
Credibility:
Confirmed
Severity:
Moderate Damage
Version Summary:
Cisco WebEx Recording Format player contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service condition on a targeted system. Updates are available.
Description
Cisco WebEx Recording Format player contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition on the targeted system.
The vulnerability is due to insufficient boundary checks by the affected software on .jpeg files. An unauthenticated, remote attacker could exploit the vulnerability by convincing a targeted user to open a malicious .jpeg file with the affected application. If successful, the attacker could execute arbitrary code on the system with the privileges of the user or cause the application to crash.
Cisco has confirmed the vulnerability in a security advisory and released software updates.
Warning Indicators
The following Cisco WebEx Recording Format players on Microsoft Windows, Apple Mac OS X, and Linux platforms are vulnerable:
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.
Users who are attending a WebEx meeting are not affected by this vulnerability.
Cisco indicates through the CVSS score that proof-of-concept exploit code exists; however, the code is not known to be publicly available.
An unauthenticated, remote attacker could exploit the vulnerability to cause a DoS condition or to execute arbitrary code on a targeted system with the privileges of the user. If the user holds elevated privileges, a successful exploit could result in a complete system compromise.
Technical Information
The vulnerability is due to insufficient boundary checks by the affected software on .jpeg files when processing WebEx Recording Format .wrf files. While processing .wrf files, the vulnerable software fails to allocate sufficient memory resources resulting in a buffer overflow condition.
An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to open a malicious .wrf file with the affected application. When processed, the file could cause a memory corruption that could allow the attacker to execute arbitrary code on the system with the privileges of the user or cause the application to crash, resulting in a DoS condition.
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.
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.
