Linksys BEF Router prior 1.50 Authentication Gozila.cgi denial of service

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 was found in Linksys BEF Router. It has been classified as critical. This impacts an unknown function of the file Gozila.cgi of the component Authentication. This manipulation causes denial of service. The attack can be initiated remotely. Additionally, an exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linksys BEF Router (Router Operating System). It has been declared as critical. Affected by this vulnerability is an unknown code block of the file Gozila.cgi of the component Authentication. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The bug was discovered 11/10/2003. The weakness was released 06/05/2004 by b0f as not defined posting (Bugtraq). It is possible to read the advisory at securityfocus.com. The attack can be launched remotely. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

After before and not just, there has been an exploit disclosed. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 208 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.50 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at linksys.com. The best possible mitigation is suggested to be upgrading to the latest version. Attack attempts may be identified with Snort ID 2225.

The vulnerability is also documented in the databases at X-Force (16305), SecurityFocus (BID 10453†), OSVDB (6655†) and Secunia (SA11764†). Additional details are provided at securiteam.com. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Linksys

Name

• BEF Router

License

• commercial

Website

• Vendor: https://www.linksys.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: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
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: BEF Router 1.50
Patch: linksys.com

Snort ID: 2225

Timelineinfo

11/10/2003 🔍
06/03/2004 +206 days 🔍
06/03/2004 +0 days 🔍
06/05/2004 +2 days 🔍
06/05/2004 +0 days 🔍
06/08/2004 +2 days 🔍
06/28/2019 +5498 days 🔍

Sourcesinfo

Vendor: linksys.com

Advisory: securityfocus.com⛔
Researcher: b0f
Status: Not defined

GCVE (VulDB): GCVE-100-691
X-Force: 16305 - Linksys DomainName buffer overflow, Medium Risk
SecurityFocus: 10453 - Multiple Linksys Routers Gozila.CGI Denial Of Service Vulnerabilities
Secunia: 11764 - Linksys BEF Series Routers Denial of Service Vulnerabilities, Moderately Critical
OSVDB: 6655 - Linksys BEF Series Routers Gozila.cgi Multiple Parameter Remote DoS

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

Entryinfo

Created: 06/08/2004 11:32
Updated: 06/28/2019 16:20
Changes: 06/08/2004 11:32 (69), 06/28/2019 16:20 (3)
Complete: 🔍
Cache ID: 216:9DA:103

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

Discussion

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