CVE-2013-0535 in Lotus Sametime
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the Classic Meeting Server in IBM Sametime 7.5.1.2 through 8.5.2.1 allow remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 02/18/2018
The vulnerability identified as CVE-2013-0535 represents a critical cross-site scripting weakness within IBM Sametime's Classic Meeting Server component. This security flaw affects versions ranging from 7.5.1.2 through 8.5.2.1, exposing organizations to significant risks when users interact with the meeting server functionality. The vulnerability permits authenticated attackers to execute malicious scripts within the context of other users' browsers, potentially compromising the integrity of communications and data within the Sametime environment.
The technical nature of this vulnerability stems from inadequate input validation and output encoding mechanisms within the Classic Meeting Server's web interface. Attackers can exploit this weakness by crafting specially formatted requests that contain malicious script code, which then gets executed when other users view the affected content. The unspecified vectors suggest that multiple entry points within the application's interface may be susceptible to this type of injection attack, making the vulnerability particularly challenging to fully mitigate without comprehensive code review and patching.
From an operational perspective, this vulnerability poses substantial risks to enterprise communications security. Organizations utilizing IBM Sametime for collaborative meetings and instant messaging face potential data breaches, session hijacking, and unauthorized access to sensitive meeting information. The authenticated nature of the attack means that adversaries must already have valid credentials to exploit the vulnerability, but this requirement does not significantly reduce the risk given that credential compromise can occur through various attack vectors including phishing, password reuse, or insider threats. The impact extends beyond simple script execution to potentially enable more sophisticated attacks such as credential theft, data exfiltration, or establishment of persistent backdoors within the organization's communication infrastructure.
The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and represents a classic example of how insecure input handling can lead to severe security consequences. From an attacker's perspective, this vulnerability fits within the initial access and persistence phases of the MITRE ATT&CK framework, potentially enabling lateral movement and privilege escalation within the network. Organizations should prioritize immediate patching of affected systems and implement additional security controls such as web application firewalls, input sanitization, and regular security assessments to mitigate the risk of exploitation. The remediation process requires careful coordination to ensure that all components of the Sametime infrastructure are updated consistently, as partial patching may leave systems vulnerable to exploitation. Security teams should also consider implementing network monitoring to detect anomalous behavior that might indicate exploitation attempts and establish incident response procedures specifically tailored to address cross-site scripting vulnerabilities in collaboration platforms.