CVE-2018-15422 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-2018-15422 represents a critical security flaw in Cisco Webex Network Recording Player and Cisco Webex Player software for Microsoft Windows platforms. This issue stems from improper validation mechanisms within the affected applications when processing Advanced Recording Format and Webex Recording Format files. The vulnerability classification aligns with CWE-121, which addresses stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow conditions, both of which are common entry points for arbitrary code execution exploits. The flaw exists at the input validation layer where the software fails to adequately sanitize and verify the integrity of multimedia recording files before processing them.
The exploitation vector for this vulnerability operates through social engineering techniques where attackers craft malicious ARF or WRF files designed to trigger the buffer overflow condition when opened by the vulnerable software. When a user opens such a crafted file, the malformed data causes the application to write beyond allocated memory boundaries, potentially allowing an attacker to overwrite critical program memory locations and inject malicious code. This type of attack pattern is consistent with techniques documented in the MITRE ATT&CK framework under the T1203 category, which covers Obfuscated Files or Information, and T1059, which covers Command and Scripting Interpreter. The attack chain typically begins with initial compromise through phishing campaigns targeting end users, leveraging the trust relationship between users and the legitimate software.
The operational impact of this vulnerability extends beyond simple code execution capabilities to encompass full system compromise potential. Successful exploitation could enable attackers to gain persistent access to affected systems, escalate privileges, and establish backdoor access for continued unauthorized operations. The vulnerability affects Microsoft Windows environments, making it particularly dangerous in enterprise settings where users frequently interact with multimedia content through collaborative platforms. Organizations utilizing Cisco Webex for video conferencing and recording activities face significant risk, as these applications are often used in sensitive business environments where unauthorized access could result in data breaches, intellectual property theft, and operational disruption. The vulnerability's impact is amplified by the widespread adoption of Cisco Webex solutions across various industries including finance, healthcare, and government sectors.
Mitigation strategies for CVE-2018-15422 should encompass both immediate and long-term security measures to protect affected systems. Immediate remediation involves applying the official Cisco security patches and updates released to address the buffer overflow conditions in the affected software components. Organizations should also implement network-based controls including email filtering solutions that scan for potentially malicious file attachments and web content delivery systems that block access to known malicious domains. Additionally, user education and awareness programs should be enhanced to recognize suspicious email attachments and links that may contain malicious recording files. The implementation of principle of least privilege access controls and application whitelisting policies can further reduce the attack surface by limiting the execution of untrusted multimedia files. Security monitoring should include detection of anomalous file processing activities and unusual network connections that may indicate exploitation attempts. Organizations should also consider implementing network segmentation strategies to isolate systems that process multimedia content, thereby limiting the potential lateral movement if a system becomes compromised. Regular vulnerability assessments and penetration testing should be conducted to identify and remediate similar issues in other multimedia processing applications within the enterprise environment.