CVE-2012-6397 in Quad
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Cisco WebEx Social (formerly Cisco Quad) allows remote attackers to inject arbitrary web script or HTML via a crafted RSS service link, aka Bug ID CSCub61977.
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Analysis
by VulDB Data Team • 03/16/2019
The vulnerability identified as CVE-2012-6397 represents a critical cross-site scripting flaw within Cisco WebEx Social, formerly known as Cisco Quad, a collaboration and social networking platform designed for enterprise environments. This vulnerability specifically affects the platform's handling of RSS service links, creating a pathway for remote attackers to execute malicious code within the context of users' browsers. The flaw exists in the application's input validation mechanisms, where crafted RSS links are not properly sanitized before being processed and displayed to end users. This type of vulnerability falls under CWE-79, which categorizes cross-site scripting as a fundamental web application security weakness that allows attackers to inject client-side scripts into web pages viewed by other users.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious RSS service link containing embedded JavaScript or HTML code that gets executed when a victim clicks on the link within the WebEx Social environment. The attack vector leverages the platform's RSS feed parsing functionality, where the application fails to adequately filter or escape special characters and script tags in the feed URLs. When users navigate to pages containing these malicious links or when the system automatically processes the RSS feeds, the injected code executes in the victim's browser context, potentially leading to session hijacking, data theft, or further compromise of the user's environment. This vulnerability demonstrates the classic characteristics of a reflected XSS attack pattern where malicious input is immediately reflected back to the user without proper sanitization.
The operational impact of CVE-2012-6397 extends beyond simple script execution, as it can enable attackers to establish persistent access to enterprise networks through compromised user sessions. In enterprise environments where WebEx Social serves as a collaboration platform for sensitive business communications, this vulnerability could allow attackers to access confidential documents, intercept communications, or escalate privileges within the platform. The attack requires minimal user interaction, typically just clicking on a malicious link, making it particularly dangerous in social engineering campaigns. Organizations using this platform face significant risk of data breaches and unauthorized access, especially when the platform is integrated with other enterprise systems or used for sharing sensitive information. The vulnerability also aligns with ATT&CK technique T1566, which covers social engineering tactics that leverage web-based attacks to compromise user systems.
Mitigation strategies for this vulnerability should include immediate implementation of input validation controls and output encoding for all RSS feed processing within the WebEx Social platform. Organizations should deploy web application firewalls to filter malicious payloads and implement strict content security policies that prevent execution of unauthorized scripts. Regular security updates and patches from Cisco should be applied promptly, as this vulnerability was addressed through official security advisories. Network segmentation and user education regarding suspicious links can provide additional layers of defense, though these measures are secondary to proper application-level fixes. The vulnerability also underscores the importance of implementing comprehensive web application security testing, including dynamic application security testing and manual penetration testing to identify similar input validation flaws in other enterprise applications. Organizations should also consider implementing automated monitoring for suspicious RSS feed activity and user behavior that might indicate exploitation attempts.