Kerio Unified Threat Management 9.1.0 Login excessive authentication

Summaryinfo

A vulnerability classified as problematic was found in Kerio Unified Threat Management 9.1.0. Affected by this issue is some unknown functionality of the component Login. Executing a manipulation can lead to excessive authentication. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Kerio Unified Threat Management 9.1.0 and classified as critical. This vulnerability affects an unknown function of the component Login. The manipulation with an unknown input leads to a excessive authentication vulnerability. The CWE definition for the vulnerability is CWE-307. The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 08/24/2016. The weakness was published 09/22/2016 by R. Freingruber and R. Tavakoli with SEC Consult as 20160922-0 as not defined mailinglist post (Full-Disclosure). The advisory is shared for download at seclists.org. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1110.001. The advisory points out:

There are no bruteforce protections in place for the login. If an unauthenticated victim visits an attacker's website, the attacker can start a bruteforce attack to obtain valid credentials to execute the remote code execution exploit. Via image-loading the attacker can detect if the current credentials are valid (without violating SOP).

The vulnerability was handled as a non-public zero-day exploit for at least 29 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 9.1.3 eliminates this vulnerability.

Similar entries are available at VDB-91836, VDB-91837, VDB-91838 and VDB-91839. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Kerio

Name

• Unified Threat Management

Version

• 9.1.0

License

• commercial

Website

• Vendor: http://kerio.com/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion