CVE-2012-1337 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-2012-1335 and CVE-2012-1336.
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Analysis
by VulDB Data Team • 03/22/2021
The vulnerability identified as CVE-2012-1337 represents a critical buffer overflow flaw within Cisco WebEx Recording Format player software across multiple product versions. This issue affects various iterations of the T27 series including T27 L through SP11 EP26, T27 LB through SP21 EP10, T27 LC before SP25 EP10, and T27 LD before SP32 CP1. The flaw manifests when the affected software processes maliciously crafted WRF files, creating a remote code execution vector that adversaries can exploit from distant locations without requiring local access or authentication. The vulnerability operates by overwriting adjacent memory locations in the application's memory space, potentially allowing attackers to inject and execute arbitrary code with the privileges of the affected process.
The technical nature of this buffer overflow stems from inadequate input validation within the WRF file parsing functionality of the Cisco WebEx player. When the application encounters a specially crafted WRF file, it fails to properly bounds-check data structures during file processing, leading to memory corruption that can be leveraged for code execution. This particular vulnerability differs from related issues CVE-2012-1335 and CVE-2012-1336, indicating distinct code paths and exploitation methods within the same product line. The flaw aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of improper input validation that enables memory corruption attacks. From an operational perspective, this vulnerability poses significant risk to organizations relying on Cisco WebEx for collaboration and presentation sharing, as simply opening a malicious WRF file could compromise system integrity and provide attackers with persistent access to network resources.
The impact of CVE-2012-1337 extends beyond individual system compromise to potentially enable broader network infiltration and lateral movement capabilities. Attackers exploiting this vulnerability could gain unauthorized access to sensitive corporate data, establish persistent backdoors, or use the compromised systems as launching points for additional attacks within the network infrastructure. The remote exploit nature means that threat actors could target users through email attachments, web downloads, or other delivery mechanisms without requiring physical access to target systems. Organizations utilizing Cisco WebEx for business-critical presentations and meetings face particular risk, as the attack surface includes any user who might encounter malicious WRF content. Security professionals should consider this vulnerability in the context of ATT&CK framework's T1059 technique for command and script injection, as the exploited buffer overflow could enable attackers to execute malicious commands with elevated privileges. The vulnerability's exploitation requires no user interaction beyond opening the malicious file, making it particularly dangerous in environments where users regularly open files from untrusted sources or where automated file processing occurs.
Mitigation strategies for CVE-2012-1337 should include immediate deployment of Cisco's official security patches and updates, which address the underlying buffer overflow conditions in the affected WebEx player versions. Organizations should implement network segmentation and access controls to limit the potential impact of successful exploitation attempts, while also deploying intrusion detection systems capable of identifying suspicious WRF file handling activities. Security teams should conduct comprehensive vulnerability assessments to identify all affected systems and ensure that all instances of the vulnerable software are updated promptly. Additionally, user education programs should emphasize the importance of avoiding suspicious file attachments and verifying the legitimacy of WRF content before opening files. Network administrators should consider implementing application whitelisting policies that restrict execution of the vulnerable WebEx player software to trusted environments only, while also monitoring for unusual file processing patterns that might indicate exploitation attempts. Regular security audits should verify that all Cisco WebEx installations have been properly patched and that no legacy versions remain operational in the environment.