CVE-2012-1417 in Ip Phone Sip-t21p
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Local Phone book and Blacklist form in Yealink VOIP Phones allow remote authenticated users to inject arbitrary web script or HTML via the user field to cgi-bin/ConfigManApp.com.
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Analysis
by VulDB Data Team • 08/25/2024
The vulnerability identified as CVE-2012-1417 represents a critical cross-site scripting flaw discovered in Yealink VOIP phones, specifically affecting the Local Phone book and Blacklist functionality. This issue resides within the web interface of these devices, which exposes a pathway for malicious actors to execute unauthorized code within the context of authenticated user sessions. The vulnerability manifests through the user field parameter in the cgi-bin/ConfigManApp.com endpoint, which fails to properly sanitize input data before processing. This allows remote authenticated users to inject arbitrary web scripts or HTML code that can be executed when other users view the affected pages. The flaw fundamentally undermines the security model of the device by enabling attackers to leverage legitimate user sessions to perform malicious activities.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the web application layer of the Yealink VOIP phones. When user-supplied data enters the system through the user field parameter, it undergoes insufficient sanitization processes that would normally prevent malicious code injection. The affected cgi-bin/ConfigManApp.com interface serves as the attack vector where unfiltered input flows directly into the web application's rendering process. This represents a classic case of stored cross-site scripting where malicious payloads persist in the device's configuration database and execute whenever the affected pages are accessed. The vulnerability is classified under CWE-79 as a failure to sanitize user input, which directly enables XSS attacks by allowing untrusted data to be interpreted as executable code.
The operational impact of CVE-2012-1417 extends beyond simple script injection, as it provides attackers with potential access to sensitive communication data and device configuration information. An attacker who successfully exploits this vulnerability could redirect users to malicious websites, steal session cookies, or gain unauthorized access to the phone's administrative functions. The remote authenticated nature of this vulnerability means that attackers only need valid login credentials to the device to execute attacks, significantly reducing the attack surface. This weakness could enable man-in-the-middle attacks, credential theft, or even complete device compromise if attackers can escalate privileges through additional exploitation techniques. The vulnerability affects the integrity and confidentiality of communications within the enterprise network where these devices are deployed.
Mitigation strategies for CVE-2012-1417 should prioritize immediate firmware updates from Yealink to address the underlying input validation issues. Network administrators must implement strict access controls and ensure that only authorized personnel can access the device configuration interfaces. Input sanitization measures should be enforced at the application level, including proper HTML encoding of all user-supplied content before storage or display. Regular security audits of web interfaces should be conducted to identify similar vulnerabilities in other networked devices. The implementation of web application firewalls and content security policies can provide additional layers of protection against XSS attacks. Organizations should also consider implementing network segmentation to limit the potential impact of successful exploitation and establish monitoring protocols to detect unauthorized access attempts to device management interfaces. This vulnerability demonstrates the importance of proper input validation in embedded web applications and aligns with ATT&CK technique T1059.001 for command and scripting interpreter usage in executing malicious code through web interfaces.