CVE-2018-15414 in WebEx Network Recording Player
Summary
by MITRE
A vulnerability in the Cisco Webex Network Recording Player for Microsoft Windows and the Cisco Webex Player for Microsoft Windows could allow an attacker to execute arbitrary code on an affected system. The vulnerability exist because the affected software improperly validates Advanced Recording Format (ARF) and Webex Recording Format (WRF) files. An attacker could exploit this vulnerability by sending a user a malicious ARF or WRF file via a link or an email attachment and persuading the user to open the file by using the affected software. A successful exploit could allow the attacker to execute arbitrary code on the affected system.
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Analysis
by VulDB Data Team • 05/22/2023
This vulnerability resides in Cisco Webex Network Recording Player and Cisco Webex Player software for Microsoft Windows, representing a critical security flaw that enables remote code execution through malformed media files. The issue stems from insufficient input validation mechanisms within the affected applications when processing Advanced Recording Format and Webex Recording Format files. According to CWE-129, this vulnerability manifests as an inadequate input validation weakness where the software fails to properly sanitize or verify the structure and content of incoming ARF and WRF files before processing them. The flaw creates a pathway for attackers to craft malicious files that, when opened by unsuspecting users, trigger buffer overflow conditions or other memory corruption vulnerabilities within the player applications.
The exploitation vector leverages social engineering techniques where attackers distribute malicious files through email attachments or web links, relying on user trust to initiate execution of the compromised software. This approach aligns with ATT&CK technique T1204.002 which describes user execution through maliciously crafted files, making the vulnerability particularly dangerous in enterprise environments where users frequently interact with email and web content. When a victim opens a specially crafted ARF or WRF file, the malformed data triggers unexpected behavior in the player's parsing routines, potentially leading to arbitrary code execution with the privileges of the logged-in user. The vulnerability affects systems where the Webex players are installed and actively used, creating a broad attack surface that extends across various organizational endpoints.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise, as attackers can leverage the executed code to establish persistent access, escalate privileges, or deploy additional malicious payloads. This represents a significant risk to enterprise security posture since the vulnerability can be exploited without requiring user interaction beyond opening a file, making it particularly dangerous in targeted attack scenarios. The flaw affects multiple versions of Cisco Webex players across different Windows operating systems, creating widespread exposure across various network environments. Organizations utilizing these players for collaborative meetings, training sessions, or remote work scenarios face heightened risk, as the vulnerability can be exploited through legitimate business communication channels. Security teams must consider this vulnerability as part of their threat modeling efforts, particularly in environments where email filtering and endpoint protection may not adequately prevent exploitation.
Mitigation strategies should prioritize immediate software updates from Cisco to address the validation flaws in file processing routines. Organizations should implement network-based controls such as email filtering rules that block suspicious file attachments and web content that may contain malicious ARF or WRF files. Endpoint protection measures including application whitelisting and sandboxing techniques can provide additional layers of defense against exploitation attempts. Security monitoring should focus on detecting unusual file access patterns and potential exploitation attempts through the Webex player applications. Regular security awareness training programs should educate users about the risks of opening unexpected email attachments and clicking on suspicious links, as social engineering remains a critical component of successful exploitation. The vulnerability highlights the importance of secure coding practices and input validation in multimedia processing applications, emphasizing that even seemingly benign file format handlers can present significant security risks when inadequate validation mechanisms are implemented.