CVE-2018-15412 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
The vulnerability identified as CVE-2018-15412 represents a critical code execution flaw in Cisco Webex recording player software for Microsoft Windows environments. This security weakness stems from inadequate input validation mechanisms within the affected software's handling of multimedia file formats, specifically Advanced Recording Format and Webex Recording Format files. The vulnerability manifests when the software processes these file types without proper sanitization, creating an attack surface that adversaries can exploit to gain unauthorized system access and execute malicious code. The flaw affects both the Cisco Webex Network Recording Player and the Cisco Webex Player for Microsoft Windows, indicating a widespread impact across Cisco's collaboration platform ecosystem.
The technical exploitation of this vulnerability relies on a classic social engineering attack vector where malicious actors craft specially crafted ARF or WRF files designed to trigger the code execution flaw when opened by unsuspecting users. The attack methodology follows a well-established pattern of delivering malicious payloads through email attachments or web links, leveraging the trust users place in legitimate collaboration software. When a user opens the compromised file using the vulnerable Cisco Webex player, the software's insufficient validation routines fail to detect the malicious code embedded within the media file structure, allowing the attacker's payload to execute with the privileges of the user running the application. This represents a typical buffer overflow or injection vulnerability pattern that falls under the broader category of software input validation failures.
From an operational perspective, the impact of CVE-2018-15412 extends beyond simple privilege escalation to encompass potential full system compromise and data exfiltration capabilities. The vulnerability creates a persistent threat vector that can be leveraged for lateral movement within network environments, as successful exploitation provides attackers with a foothold that can be used to establish additional persistence mechanisms. The affected software's widespread deployment in enterprise collaboration environments means that a single compromised user could potentially lead to broader organizational breaches. This vulnerability aligns with ATT&CK framework techniques such as initial access through social engineering and execution through malicious file attachments, while also mapping to CWE-121 which addresses buffer overflow conditions and CWE-74 which covers injection flaws in software applications.
Organizations affected by this vulnerability should implement immediate mitigations including disabling automatic execution of potentially malicious files, implementing strict email filtering policies, and ensuring that users are educated about the risks of opening untrusted attachments. Network segmentation and monitoring should be enhanced to detect unusual file access patterns that might indicate exploitation attempts. The recommended remediation approach includes applying Cisco's official security patches as soon as they become available, while also implementing application whitelisting policies that restrict execution of unauthorized software. Security teams should also consider deploying endpoint detection and response solutions that can identify suspicious behavior patterns associated with file processing and code execution activities. The vulnerability demonstrates the critical importance of validating all input data within multimedia processing applications and highlights the need for robust security controls in collaboration and productivity software platforms that handle user-generated content.