CVE-2012-1335 in WebEx Player
Summary
by MITRE
Buffer overflow in the Cisco WebEx Recording Format (WRF) player T27 L through SP11 EP26, T27 LB through SP21 EP10, T27 LC before SP25 EP10, and T27 LD before SP32 CP1 allows remote attackers to execute arbitrary code via a crafted WRF file, a different vulnerability than CVE-2012-1336 and CVE-2012-1337.
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Analysis
by VulDB Data Team • 03/22/2021
The vulnerability identified as CVE-2012-1335 represents a critical buffer overflow flaw within Cisco WebEx Recording Format player software across multiple version ranges including T27 L through SP11 EP26, T27 LB through SP21 EP10, T27 LC before SP25 EP10, and T27 LD before SP32 CP1. This security weakness specifically affects the handling of WRF files, which are used to store and playback Cisco WebEx recordings. The flaw stems from inadequate input validation and memory management within the player's processing routines for WRF file structures. The vulnerability is classified under CWE-121, which encompasses buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. This particular implementation flaw occurs during the parsing of WRF file headers and content structures, where attacker-controlled data is copied into fixed-size buffers without proper size verification.
The operational impact of this vulnerability extends beyond simple code execution as it enables remote attackers to gain unauthorized control over affected systems. When a user opens a maliciously crafted WRF file, the buffer overflow allows an attacker to overwrite critical memory regions including return addresses, function pointers, and other control data. This enables arbitrary code execution with the privileges of the affected application, typically the user account running the WebEx player. The attack vector is particularly dangerous because it requires no user interaction beyond opening the file, making it susceptible to phishing campaigns and automated exploitation. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter and T1203 for Exploitation for Client Execution, as the malicious payload executes within the context of the vulnerable application. The vulnerability affects Cisco WebEx Recording Format player versions released between 2009 and 2012, representing a significant attack surface for organizations using legacy WebEx implementations.
Mitigation strategies for CVE-2012-1335 should prioritize immediate patch deployment from Cisco's security advisories, specifically addressing the buffer overflow conditions in the T27 series player versions mentioned in the vulnerability description. Organizations should implement network-based controls such as content filtering and file type restrictions to prevent execution of potentially malicious WRF files from untrusted sources. The implementation of principle of least privilege should be enforced where the WebEx player application runs with minimal required permissions, reducing potential impact from successful exploitation. Additionally, security teams should deploy endpoint protection solutions with behavioral monitoring capabilities to detect anomalous execution patterns that may indicate exploitation attempts. Network segmentation and web application firewalls should be configured to restrict access to WebEx-related services and prevent lateral movement if exploitation occurs. Regular vulnerability assessments and penetration testing should be conducted to identify similar buffer overflow conditions in other legacy applications and ensure comprehensive protection against similar attack vectors. The vulnerability highlights the importance of maintaining up-to-date software versions and implementing robust input validation practices as recommended by the OWASP Top 10 security framework.