CVE-2018-15409 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 code execution flaw that could be leveraged by remote attackers. The vulnerability stems from inadequate input validation mechanisms within the affected software's handling of Advanced Recording Format and Webex Recording Format files. According to CWE-129, this represents an implementation weakness where the software fails to properly validate input data before processing it, creating a pathway for malicious code injection. The flaw specifically manifests when these applications process ARF and WRF files without sufficient sanitization measures, allowing attackers to craft specially malformed files that trigger buffer overflows or other memory corruption conditions.
The exploitation vector for this vulnerability is particularly concerning as it relies on social engineering techniques to deliver malicious payloads through email attachments or web links. Attackers can craft ARF or WRF files that contain malicious code designed to exploit the input validation gaps when the affected software attempts to parse these files. The attack chain typically begins with an unsuspecting user receiving a malicious file through email or web browsing, followed by the user opening the file with the vulnerable Webex software, which then executes the embedded malicious code with the privileges of the affected user. This scenario aligns with ATT&CK technique T1203, where adversaries use malicious files to gain execution privileges on target systems.
The operational impact of this vulnerability extends beyond simple code execution, potentially enabling full system compromise and lateral movement within network environments. When successfully exploited, the malicious code could establish persistence mechanisms, escalate privileges, or serve as a launching point for additional attacks. The vulnerability affects multiple versions of Cisco Webex software, making it particularly dangerous as it could impact a wide range of enterprise and consumer systems. Organizations using these applications face significant risk of unauthorized access, data exfiltration, and potential network infiltration through this code execution vector.
Mitigation strategies should prioritize immediate patching of affected software versions, as Cisco has released security updates addressing this vulnerability. Network segmentation and email filtering mechanisms can help reduce the attack surface by limiting file delivery channels and preventing initial access. Additionally, user education programs should emphasize the importance of verifying file sources and avoiding opening suspicious attachments or clicking untrusted links. System hardening measures including application whitelisting, restricted user privileges, and regular security audits can provide additional layers of protection against exploitation attempts. The vulnerability also underscores the importance of secure coding practices and input validation in multimedia processing applications, as highlighted by CWE-20 and related security standards that emphasize the need for robust data validation mechanisms in all software components that process external input.