A vulnerability has been found in ZyXEL P660HN-T v1 (Router Operating System) (version unknown) and classified as critical. Affected by this vulnerability is an unknown function of the file ViewLog.asp. The manipulation of the argument remote_host with the input value %3bping+-c+3+10.0.99.102%3b%23 leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 12/26/2016 as 2910 as not defined advisory (Website) via Securiteam. The advisory is shared at blogs.securiteam.com. The public release happened without involvement of ZyXEL. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1202 for this issue.

A public exploit has been developed in HTTP POST Request and been published immediately after the advisory. It is possible to download the exploit at blogs.securiteam.com. It is declared as proof-of-concept. By approaching the search of inurl:ViewLog.asp it is possible to find vulnerable targets with Google Hacking. The code used by the exploit is:

POST /cgi-bin/ViewLog.asp HTTP/1.1
remote_submit_Flag=1&remote_syslog_Flag=1&RemoteSyslogSupported=1&LogFlag=0&remote_host=%3bping+-c+3+10.0.99.102%3b%23&remoteSubmit=Save

Proper firewalling of is able to address this issue. The advisory contains the following remark:

We notified ZyXEL of the vulnerabilities back in July 2016, repeated attempts to re-establish contact and get some answer on the status of the patches for these vulnerabilities went unanswered.

Entries connected to this vulnerability are available at VDB-94802, VDB-94803, VDB-94804 and VDB-94805.

Productinfo

Type

• Router Operating System

Vendor

• ZyXEL

Name

• P660HN-T v1

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

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Entryinfo

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