Cisco WebEx Recording Format 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 memory operations performed by the affected software. An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to view a website that is designed to pass a malicious WebEx Recording Format (.wrf ) file to the affected software. If successful, the attacker could execute arbitrary code on the system.
Cisco has confirmed the vulnerability in a security advisory and released software updates.
Indicators of Compromise
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
The vulnerability is due to improper memory operations performed when the affected software attempts to process malicious .wrf files.
An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to view a website that is designed to pass malicious .wrf input to the affected software. When processed, the input could cause memory corruption errors in the affected software. 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.
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.
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.
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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.