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.
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 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.
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.