A vulnerability was found in ZyXEL ZyWALL USG 2.12 AQQ.2/3.30 AQQ.7 (Firewall Software) and classified as problematic. This issue affects an unknown code block of the file cgi-bin/zysh-cgi. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is integrity. The summary by CVE is:

ZyXEL ZyWALL USG 2.12 AQQ.2 and 3.30 AQQ.7 devices are affected by a CSRF vulnerability via a cgi-bin/zysh-cgi cmd action to add a user account. This account's access could, for example, subsequently be used for stored XSS.

The bug was discovered 10/11/2018. The weakness was published 11/10/2018 (Website). It is possible to read the advisory at shellcode.it. The identification of this vulnerability is CVE-2017-17550 since 12/11/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/11/2020).

The vulnerability was handled as a non-public zero-day exploit for at least 30 days. During that time the estimated underground price was around $5k-$25k.

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

Productinfo

Type

• Firewall Software

Vendor

• ZyXEL

Name

• ZyWALL USG

Version

• 2.12 AQQ.2
• 3.30 AQQ.7

License

• commercial

CPE 2.3info

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CPE 2.2info

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