Zyxel VMG3625-T50B up to V5.50(ABPM.9.2)C0 CGI Program action buffer overflow

Summaryinfo

A vulnerability was found in Zyxel VMG3625-T50B up to V5.50(ABPM.9.2)C0. It has been classified as critical. The impacted element is an unknown function of the component CGI Program. This manipulation of the argument action causes buffer overflow. This vulnerability is handled as CVE-2024-9197. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Zyxel VMG3625-T50B up to V5.50(ABPM.9.2)C0. It has been declared as critical. Affected by this vulnerability is an unknown code block of the component CGI Program. The manipulation of the argument action with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. The summary by CVE is:

A post-authentication buffer overflow vulnerability in the parameter "action" of the CGI program in Zyxel VMG3625-T50B firmware versions through V5.50(ABPM.9.2)C0 could allow an authenticated attacker with administrator privileges to cause a temporary denial of service (DoS) condition against the web management interface by sending a crafted HTTP GET request to a vulnerable device if the function ZyEE is enabled.

It is possible to read the advisory at zyxel.com. This vulnerability is known as CVE-2024-9197 since 09/26/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation needs additional levels of successful authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/03/2024).

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

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Productinfo

Vendor

• Zyxel

Name

• VMG3625-T50B

Version

• V5.50(ABPM.9.2)C0

License

• commercial

Website

• Vendor: https://www.zyxel.com/

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