Summaryinfo

A vulnerability was found in ZyXEL Wireless N300 NetUSB 1.00(bfq.6)c0. It has been declared as problematic. Affected is the function checkWeather of the file forecastrss.xml of the component XML File Handler. Executing a manipulation with the input <yweather:condition text="Partly Cloudy" code="47" temp="<overflow data goes here>" can lead to memory corruption. This vulnerability is tracked as CVE-2014-0355. No exploit exists.

Detailsinfo

A vulnerability was found in ZyXEL Wireless N300 NetUSB 1.00(bfq.6)c0. It has been declared as critical. This vulnerability affects the function checkWeather of the file forecastrss.xml of the component XML File Handler. The manipulation with the input value <yweather:condition text="Partly Cloudy" code="47" temp="<overflow data goes here>" leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Multiple stack-based buffer overflows on the ZyXEL Wireless N300 NetUSB NBG-419N router with firmware 1.00(BFQ.6)C0 allow man-in-the-middle attackers to execute arbitrary code via (1) a long temp attribute in a yweather:condition element in a forecastrss file that is processed by the checkWeather function; the (2) WeatherCity or (3) WeatherDegree variable to the detectWeather function; unspecified input to the (4) UpnpAddRunRLQoS, (5) UpnpDeleteRunRLQoS, or (6) UpnpDeletePortCheckType function; or (7) the SET COUNTRY udps command.

The weakness was disclosed 04/15/2014 as VU#939260 as not defined vulnerability note (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability was named CVE-2014-0355 since 12/05/2013. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/19/2024).

By approaching the search of inurl:forecastrss.xml it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (92618) and SecurityFocus (BID 66794†). The entries VDB-13010, VDB-13011 and VDB-13013 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• ZyXEL

Name

• Wireless N300 NetUSB

Version

• 1.00(bfq.6)c0

License

• commercial

Website

• Vendor: https://www.zyxel.com/

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