Artica Web Proxy 3.06.112216 freeradius.users.php username-form-id os command injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Artica Web Proxy 3.06.112216. Affected by this issue is some unknown functionality of the file freeradius.users.php. Executing a manipulation of the argument username-form-id can lead to os command injection. This vulnerability appears as CVE-2017-17055. The attack may be performed from remote. In addition, an exploit is available.

Detailsinfo

A vulnerability classified as critical was found in Artica Web Proxy 3.06.112216 (Firewall Software). This vulnerability affects an unknown functionality of the file freeradius.users.php. The manipulation of the argument username-form-id with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Artica Web Proxy before 3.06.112911 allows remote attackers to execute arbitrary code as root by conducting a cross-site scripting (XSS) attack involving the username-form-id parameter to freeradius.users.php.

The bug was discovered 11/28/2017. The weakness was presented 12/01/2017 by hyp3rlinx as EDB-ID 43206 as confirmed exploit (Exploit-DB). The advisory is shared for download at exploit-db.com. This vulnerability was named CVE-2017-17055 since 11/29/2017. The attack can be initiated remotely. The successful exploitation needs a single authentication. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202.

A public exploit has been developed by hyp3rlinx in POC and been published immediately after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:freeradius.users.php it is possible to find vulnerable targets with Google Hacking. The code used by the exploit is:

https://VICTIM-IP:9000/freeradius.users.php?username-form-id=%3C%2Fscript%3E%3Cscript%3Evar%20xhr=new%20XMLHttpRequest();xhr.onreadystatechange=function(){if(xhr.status==200){alert(xhr.responseText);}};xhr.open(%27POST%27,%27https://VICTIM-IP:9000/system.terminal.php%27,true);xhr.setRequestHeader(%27Content-type%27,%27application/x-www-form-urlencoded%27);xhr.send(%27cmdline=cat%20/etc/shadow%27);%3C%2Fscript%3E%3Cscript%3E

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 vulnerability database at Exploit-DB (43206). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Artica

Name

• Web Proxy

Version

• 3.06.112216

License

• commercial

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion