CVE-2018-15419 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-2018-15419 represents a critical code execution flaw within Cisco Webex Network Recording Player and Cisco Webex Player applications for Microsoft Windows platforms. This security weakness stems from inadequate input validation mechanisms that fail to properly scrutinize Advanced Recording Format and Webex Recording Format files. The vulnerability classification aligns with CWE-129, which addresses improper validation of input ranges, and falls under the broader category of buffer overflows and memory corruption issues. Attackers can leverage this weakness by crafting malicious ARF or WRF files that, when opened through the vulnerable software, trigger unauthorized code execution on targeted systems. The exploitation vector relies heavily on social engineering tactics where users are deceived into opening malicious attachments or clicking on compromised links that deliver these specially crafted media files.
The technical implementation of this vulnerability demonstrates a classic buffer overflow scenario where the affected software fails to adequately validate file structures and data boundaries within the ARF and WRF formats. When processing these media files, the applications do not perform sufficient bounds checking or input sanitization, allowing attackers to construct malicious payloads that exceed expected buffer sizes. This flaw creates an opportunity for attackers to overwrite critical memory locations and inject their own executable code, effectively bypassing standard system security controls. The vulnerability is particularly concerning because it operates at the application layer where user interaction is required, making it susceptible to phishing campaigns and targeted attacks that exploit human factors in addition to technical weaknesses.
From an operational impact perspective, successful exploitation of CVE-2018-15419 could result in complete system compromise, enabling attackers to establish persistent access, escalate privileges, and exfiltrate sensitive data. The attack requires minimal technical sophistication from threat actors, as it relies on user interaction with malicious files rather than complex exploitation techniques. This makes the vulnerability particularly dangerous in enterprise environments where users frequently interact with email attachments and web links. The vulnerability also aligns with ATT&CK technique T1204.002, which covers user execution through malicious file attachments, and T1059, covering command and scripting interpreter usage for execution. Organizations using Cisco Webex players for video conferencing and recording functions face significant risk exposure, as these applications are commonly used in business communications and collaborative environments.
Mitigation strategies for CVE-2018-15419 should prioritize immediate software updates from Cisco, as the vendor has released patches addressing this specific vulnerability. Network administrators should implement strict email filtering and attachment scanning protocols to prevent malicious ARF and WRF files from reaching end users. Additionally, user education and awareness programs should emphasize the dangers of opening unknown or unexpected file attachments, particularly in collaborative environments where these media formats are commonly shared. The implementation of application whitelisting policies can help restrict execution of unauthorized software, while regular security audits should verify that affected systems have been properly patched and updated. Organizations should also consider network segmentation and monitoring to detect suspicious file access patterns and potential exploitation attempts. Compliance with security frameworks such as NIST SP 800-53 and ISO 27001 requires organizations to maintain updated vulnerability assessments and remediation procedures for identified weaknesses like this CVE-2018-15419 vulnerability.