Kerio Personal Firewall up to 4.10 TCP-Stealth-Scan Detector privileges management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Kerio Personal Firewall up to 4.10 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component TCP-Stealth-Scan Detector. This manipulation causes privileges management. The attack can be initiated remotely. Additionally, an exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Kerio Personal Firewall up to 4.10 (Firewall Software). Affected by this vulnerability is an unknown part of the component TCP-Stealth-Scan Detector. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect integrity.

The weakness was released 12/12/2003 with Kerio (Website). It is possible to read the advisory at kerio.com. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

It is possible to download the exploit at insecure.org. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k.

Upgrading to version 4.0.10 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at kerio.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (14038), SecurityFocus (BID 9258†), OSVDB (3089†) and Secunia (SA10468†). Additional details are provided at computec.ch. Entry connected to this vulnerability is available at VDB-44. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Kerio

Name

• Personal Firewall

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10

License

• commercial

Website

• Vendor: http://kerio.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Personal Firewall 4.0.10
Patch: kerio.com

Timelineinfo

12/12/2003 🔍
12/19/2003 +7 days 🔍
12/19/2003 +0 days 🔍
12/22/2003 +2 days 🔍
06/07/2017 +4916 days 🔍

Sourcesinfo

Vendor: kerio.com

Advisory: kerio.com
Researcher: http://www.kerio.com
Organization: Kerio
Status: Confirmed

GCVE (VulDB): GCVE-100-451
X-Force: 14038 - Kerio Personal Firewall TCP port scan bypass firewall, Medium Risk
SecurityFocus: 9258 - Kerio Personal Firewall Stealth Port Scan Unspecified Firewall Bypassing Vulnerability
Secunia: 10468 - Kerio Personal Firewall TCP Stealth Scan Detection Vulnerability, Moderately Critical
OSVDB: 3089 - Kerio Personal Firewall TCP Stealth Scan Detection

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 12/22/2003 09:58
Updated: 06/07/2017 16:04
Changes: 12/22/2003 09:58 (67), 06/07/2017 16:04 (2)
Complete: 🔍
Cache ID: 216:066:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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