CVE-2015-2850 in InnGate
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index-login.ant in the ANTlabs InnGate firmware on IG 3100, InnGate 3.01 E, InnGate 3.10 E, InnGate 3.10 M, SG 4, and SSG 4 devices allows remote attackers to inject arbitrary web script or HTML via the msg parameter.
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Analysis
by VulDB Data Team • 11/05/2024
The CVE-2015-2850 vulnerability represents a critical cross-site scripting flaw discovered in the ANTlabs InnGate firmware across multiple device models including IG 3100, InnGate 3.01 E, InnGate 3.10 E, InnGate 3.10 M, SG 4, and SSG 4. This vulnerability resides within the index-login.ant component of the firmware, making it a prime target for remote attackers seeking to exploit web application security weaknesses. The flaw specifically manifests when the system fails to properly sanitize user input passed through the msg parameter, creating an avenue for malicious code injection that can compromise the integrity of web applications and user sessions.
The technical implementation of this vulnerability follows the classic XSS attack pattern where unvalidated input from the msg parameter is directly embedded into web responses without adequate sanitization or encoding. When a user navigates to the affected login page and interacts with the vulnerable parameter, the malicious script content gets executed within the context of the victim's browser session. This allows attackers to perform actions such as stealing session cookies, redirecting users to malicious sites, defacing web pages, or executing unauthorized operations on behalf of authenticated users. The vulnerability specifically maps to CWE-79 which defines improper neutralization of input during web page generation, making it a standard web application security weakness that has been consistently documented in security frameworks.
From an operational perspective, this vulnerability poses significant risks to organizations relying on these network security devices as they represent a potential entry point for attackers seeking to compromise network infrastructure. The remote nature of the attack means that threat actors can exploit this vulnerability from anywhere on the internet without requiring physical access or network proximity to the affected devices. This makes the vulnerability particularly dangerous in environments where these devices are exposed to external networks or where they serve as gateways for internal network access. The impact extends beyond simple web interface compromise as successful exploitation could lead to complete device takeover, enabling attackers to modify firewall rules, intercept network traffic, or establish persistent backdoors within the network infrastructure.
Security professionals should implement immediate mitigations including input validation and output encoding for all parameters passed to the login interface, particularly focusing on the msg parameter. Network segmentation strategies should be employed to limit exposure of these devices to untrusted networks, while regular firmware updates should be prioritized to address known vulnerabilities. The implementation of web application firewalls and content security policies can provide additional layers of protection against XSS attacks, though these measures are secondary to proper input validation. Organizations should also conduct comprehensive vulnerability assessments of their entire network infrastructure to identify other potentially vulnerable devices that may share similar software components or architectural weaknesses. This vulnerability demonstrates the critical importance of input sanitization in web applications and aligns with ATT&CK technique T1566 which covers the exploitation of web applications for initial access or privilege escalation, making it a significant concern for both network security teams and application security professionals.