CVE-2019-15286 in WebEx Network Recording Player
Summary
by MITRE
Multiple vulnerabilities in Cisco Webex Network Recording Player for Microsoft Windows and Cisco Webex Player for Microsoft Windows could allow an attacker to execute arbitrary code on an affected system. The vulnerabilities exist due to insufficient validation of certain elements with a Webex recording stored in either the Advanced Recording Format (ARF) or the Webex Recording Format (WRF). An attacker could exploit these vulnerabilities by sending a user a malicious ARF or WRF file through a link or email attachment and persuading the user to open the file with the affected software on the local system. A successful exploit could allow the attacker to execute arbitrary code on the affected system with the privileges of the targeted user.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 02/28/2024
The vulnerability identified as CVE-2019-15286 represents a critical security flaw in Cisco Webex Network Recording Player and Cisco Webex Player software for Microsoft Windows systems. This issue stems from inadequate input validation mechanisms within the affected applications when processing Webex recording files in either Advanced Recording Format (ARF) or Webex Recording Format (WRF) file types. The vulnerability classifies under CWE-129, which specifically addresses insufficient input validation, making it a prime target for exploitation through malicious file manipulation. The flaw exists at the core of how these applications handle file parsing operations, creating a pathway for unauthorized code execution that directly compromises system integrity.
The exploitation mechanism leverages social engineering tactics to deliver malicious payloads through seemingly legitimate channels such as email attachments or web links. Attackers can craft specially crafted ARF or WRF files that contain malicious code designed to exploit the validation gaps in the affected software. When a victim opens these malicious files using the vulnerable Webex applications, the software's failure to properly validate file contents triggers a chain of execution that allows arbitrary code to run with the privileges of the currently logged-in user. This privilege escalation capability significantly amplifies the impact of the vulnerability, as attackers can potentially gain access to sensitive data, install additional malware, or establish persistent access to the compromised system.
The operational impact of CVE-2019-15286 extends beyond individual system compromise to potentially affect entire organizational networks, particularly in environments where Webex is widely deployed for collaboration and training purposes. Organizations utilizing these recording applications for business meetings, educational sessions, or remote work scenarios face heightened risk exposure, as the attack vector requires minimal technical sophistication to execute successfully. The vulnerability affects the fundamental security posture of affected systems, creating opportunities for lateral movement within networks and potential data exfiltration. From a threat actor perspective, this vulnerability aligns with ATT&CK technique T1204.002, which involves user execution through social engineering, making it particularly dangerous in enterprise environments where user trust is often exploited for initial access.
Mitigation strategies for CVE-2019-15286 should prioritize immediate patch management through Cisco's official security advisories, as the vendor has released updates addressing the validation deficiencies in the affected software versions. Organizations should implement strict file handling policies that restrict opening of untrusted recording files, particularly those received via email or downloaded from unknown sources. Network-level controls including email filtering and web proxy configurations can help prevent delivery of malicious files through traditional attack vectors. Additionally, system administrators should consider implementing application whitelisting mechanisms that restrict execution of unauthorized software, thereby limiting the potential impact of successful exploitation attempts. Regular security awareness training for users can also reduce the likelihood of social engineering success by educating personnel about the risks associated with opening unexpected file attachments.