External risk intelligence

D-Link Gateway Cross-Site Scripting Vulnerability

CVE advisoryKnown Exploit

CVE-2013-5223

The D-Link DSL-2760U Gateway has vulnerabilities allowing authenticated users to inject web scripts or HTML. This could lead to compromised user sessions or redirection to malicious sites, posing a business risk.

4Halo Surface Signal

Cross-site Scripting

Dlink Dsl 2760u Firmware

before 1.12

External exposure likelihood

Halo Surface Signal score for CVE-2013-5223

The affected product is a residential/SOHO gateway device. These devices commonly host web-based management interfaces that are designed to be accessed over the network, making the administrative web surface a common point of interaction for users and potentially reachable in environments where the management interface is exposed to the local network or wider internet.

Horizon Alert

Summary of the vulnerability and why it matters

The D-Link DSL-2760U Gateway is susceptible to vulnerabilities that allow unauthorized users to inject malicious scripts. This could lead to the compromise of user sessions or the redirection of users to malicious websites. The core issue lies in the gateway's improper handling of user-supplied input.

  • Vulnerable D-Link DSL-2760U Gateway
  • Allows arbitrary script injection
  • Potential business risk and data compromise

Attack Path

How an attacker could exploit the issue

This vulnerability allows for cross-site scripting, enabling attackers to inject malicious code into affected systems. An attacker could leverage this by tricking an authenticated user into visiting a malicious link, which would then execute arbitrary web script or HTML. The potential impact includes the compromise of user sessions or the redirection of users to malicious websites.

  • Authenticated user access required.
  • Attacker crafts malicious input.
  • Injected script executes in user's browser.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability allows authenticated users to inject malicious scripts or HTML into web pages viewed by other users. The impact on an organization could include unauthorized access to sensitive information, manipulation of content, or redirection of users to malicious sites. Given the nature of the vulnerability, it presents a moderate risk to affected systems.

  • Attackers with authenticated access.
  • Requires prior network access.
  • Business risk is moderate.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

The identified vulnerabilities in D-Link DSL-2760U Gateway devices allow for the injection of arbitrary web script or HTML by remote authenticated users. This could impact systems by enabling unauthorized script execution, potentially leading to data exposure or manipulation. Business risk arises from the possibility of compromised user sessions or the introduction of malicious content to the network.

  • Identify affected D-Link DSL-2760U assets.
  • Reduce exposure of the management interface.
  • Apply vendor updates and validate fixes.
  • Monitor for related security events.

Frequently asked questions

What are the cross-site scripting (XSS) vulnerabilities in the D-Link DSL-2760U Gateway?

Multiple cross-site scripting (XSS) vulnerabilities exist in the D-Link DSL-2760U Gateway (Rev. E1). These weaknesses allow remote authenticated users to inject arbitrary web script or HTML into various parameters of the device's configuration interfaces, potentially leading to script execution in other users' browsers.

How does CVE-2013-5223 enable arbitrary script injection?

CVE-2013-5223 is a class of cross-site scripting (XSS) vulnerabilities. This occurs when an application fails to properly validate or sanitize data provided by users. An attacker can exploit this by submitting specially crafted input to certain parameters, which the gateway then displays without adequate cleaning, allowing malicious scripts to be embedded and executed.

What is the trigger path for XSS in the D-Link DSL-2760U Gateway?

The vulnerability can be triggered through various parameters within CGI and command scripts, including ntpServer1, username, TodUrlAdd, appName, fltName, rmLst, groupName, snmpRoCommunity, PolicyName, ippName, smbNetBiosName, smbDirName, and wlSsid. Successful exploitation requires an attacker to have authenticated access to the gateway's management interface.

What is the relevance of CVE-2013-5223 for network devices?

The Halo Surface Signal indicates a 'Likely' threat level because the affected product is a residential or small office/home office (SOHO) gateway. These devices often have web-based management interfaces accessible over a network, making the administrative surface a common interaction point and potentially exposed to local network or internet threats, thus increasing the relevance of such vulnerabilities.

What practical steps can be taken to address the D-Link DSL-2760U Gateway vulnerabilities?

To mitigate these risks, organizations should first identify all D-Link DSL-2760U assets within their environment. It is advisable to reduce the exposure of the gateway's management interface to only necessary access. Applying vendor-provided updates and validating that these fixes are effective is crucial. Continuous monitoring for related security events should also be implemented.

References