Zero-Day Advisory

Fortinet Discovers Cisco WebEx Network Recording Player Memory Corruption Vulnerability

Summary

Fortinet's FortiGuard Labs has discovered a memory corruption vulnerability in Cisco WebEx Network Recording Player.

Cisco WebEx Network Recording Player is a free tool to watch, share, and edit Cisco WebEx recordings developed and published by Cisco Systems for macOS and Windows.

A memory corruption vulnerability has been discovered in Cisco WebEx Network Recording Player. The vulnerability exists because the vulnerable software can't correctly parse a crafted arf file which causes an out-of-bounds memory read.

Solutions

FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:

Cisco.WebEx.NRP.nbrpse.ARF.Memory.Corruption
Released Oct 02, 2018

Users should apply the solution provided by Cisco.

Timeline

Fortinet reported the vulnerability to Cisco on July 10, 2018.

Cisco confirmed the vulnerability on September 12, 2018.

Cisco patched the vulnerability on October 3, 2018.

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-webex-rce
• CVE-2018-15431

Acknowledgement

This vulnerability was discovered by Yonghui Han of Fortinet's FortiGuard Labs.

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.