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.
Indicators of Compromise
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
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.
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.
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.
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM
THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products
Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.