Detection Guidance

This vulnerability can be detected by sending a crafted HTTP GET request to the router's configuration backup endpoint `/cgi-bin/DownloadNoMacaddrCfg/RouterCfm.cfg` with a specific cookie `ecos_pw=dXNlcg==1311930653:language=en`. Using a command like `curl` to perform this request can reveal the admin credentials encoded in Base64 under the parameter `http_supper_passwd`. Decoding this Base64 string will show the admin password in plaintext, confirming the vulnerability. An example command is: `curl -s -H "Cookie: ecos_pw=dXNlcg==1311930653:language=en" http://<router-ip>/cgi-bin/DownloadNoMacaddrCfg/RouterCfm.cfg | grep http_supper_passwd` [3]

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Mitigation Strategies

Immediate mitigation steps include restricting access to the router's configuration backup endpoint to trusted users only, changing default user credentials to strong, unique passwords, and applying any available firmware updates or patches from the vendor. Additionally, monitoring network traffic for suspicious HTTP GET requests to the backup endpoint and disabling remote management if not needed can reduce exposure. [1, 4]

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Executive Summary

This vulnerability in the NuCom 11N Wireless Router version 5.07.90 allows a non-privileged user (default username and password: user/user) to escalate their privileges to administrator by sending a specially crafted HTTP GET request to the router's configuration backup endpoint. The request includes a specific cookie that causes the router to disclose the administrative credentials encoded in Base64. An attacker can decode these credentials to obtain the admin password in plaintext, enabling full administrative access to the router. [1, 3, 4]

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Impact Analysis

An attacker exploiting this vulnerability can gain unauthorized administrative access to the NuCom 11N Wireless Router. This allows them to control the device, change configurations, potentially intercept or redirect network traffic, and compromise the security of the entire network connected to the router. Since the admin password is disclosed, the attacker can maintain persistent access and perform further malicious activities. [1, 3, 4]

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