Sangoma Session Border Controller 2.3.23-119 GA Web Interface Webconfig.inc.php Username injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Sangoma Session Border Controller 2.3.23-119. Affected by this vulnerability is an unknown functionality of the file /var/webconfig/gui/Webconfig.inc.php of the component GA Web Interface. The manipulation of the argument Username as part of Special Char results in injection. This vulnerability is reported as CVE-2019-12147. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Sangoma Session Border Controller 2.3.23-119. Affected is an unknown functionality of the file /var/webconfig/gui/Webconfig.inc.php of the component GA Web Interface. The manipulation of the argument username as part of a Special Char leads to a injection vulnerability. CWE is classifying the issue as CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The Sangoma Session Border Controller (SBC) 2.3.23-119 GA web interface is vulnerable to Argument Injection via special characters in the username field. Upon successful exploitation, a remote unauthenticated user can create a local system user with sudo privileges, and use that user to login to the system (either via the web interface or via SSH) to achieve complete compromise of the device. This affects /var/webconfig/gui/Webconfig.inc.php and /usr/local/sng/bin/sng-user-mgmt.

The weakness was disclosed 10/22/2019 as not defined mailinglist post (Full-Disclosure). The advisory is shared for download at seclists.org. This vulnerability is traded as CVE-2019-12147 since 05/16/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1055.

By approaching the search of inurl:var/webconfig/gui/Webconfig.inc.php 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 entry VDB-144013 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Sangoma

Name

• Session Border Controller

Version

• 2.3.23-119

CPE 2.3info

• 🔍

CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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