CVE-2008-1251 in 320 SIP Phone
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the web interface on the central phone server for the Snom 320 SIP Phone allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 11/11/2017
The CVE-2008-1251 vulnerability represents a critical cross-site scripting flaw discovered in the web interface of Snom 320 SIP phones, specifically affecting the central phone server component. This vulnerability resides within the web-based administrative interface that manages the phone system's configuration and operations, making it a prime target for malicious actors seeking to exploit the communication infrastructure. The Snom 320 series phones are widely deployed in enterprise environments for VoIP communications, which amplifies the potential impact of this vulnerability across numerous organizations. The flaw allows remote attackers to inject malicious web scripts or HTML code into the system's web interface, potentially compromising the entire phone server and its associated network resources.
The technical nature of this vulnerability stems from inadequate input validation and output encoding within the web interface components of the Snom 320 phone system. When user-supplied data is processed and rendered back to the browser without proper sanitization, it creates an environment where malicious payloads can be executed within the context of authenticated users' sessions. The unspecified vectors suggest that multiple input points within the web interface could serve as entry points for attackers, including configuration fields, user names, or other editable parameters. This vulnerability aligns with CWE-79, which specifically addresses Cross-Site Scripting flaws in web applications where untrusted data is improperly handled during web page generation. The attack surface is particularly concerning given that the affected system serves as a central phone server, potentially providing attackers with elevated privileges and access to sensitive communication data.
The operational impact of CVE-2008-1251 extends beyond simple script injection, as it could enable attackers to perform session hijacking, steal user credentials, redirect users to malicious sites, or execute arbitrary commands on the affected server. In enterprise VoIP environments, this vulnerability could compromise not only the phone system but also potentially expose underlying network infrastructure, as phone servers often serve as gateways to internal systems. The vulnerability's remote exploitability means that attackers do not require physical access or network proximity to the device, making it particularly dangerous in environments where security perimeters are not strictly enforced. Organizations using these phones could face significant risks including unauthorized access to communication records, disruption of voice services, and potential data exfiltration through the compromised web interface. The attack could be particularly devastating in mission-critical environments where phone communications are essential for business operations.
Mitigation strategies for this vulnerability should prioritize immediate patching and configuration hardening measures. Organizations must ensure that all Snom 320 devices are updated with the latest firmware releases that address this XSS vulnerability, as the original manufacturer would have issued security patches to resolve the input validation issues. Network segmentation and firewall rules should be implemented to restrict access to the phone server's web interface, limiting exposure to only authorized administrative users. Additional protective measures include implementing web application firewalls to detect and block malicious script injection attempts, enabling secure HTTP headers to prevent XSS attacks, and conducting regular security assessments of the VoIP infrastructure. The vulnerability's classification under ATT&CK technique T1059.007 for scripting languages and T1566 for credential access highlights the potential for attackers to escalate privileges and maintain persistent access through this vector, emphasizing the need for comprehensive security monitoring and incident response procedures.