Cisco IOS 12.1 VLAN Trunking Protocol 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.
6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS 12.1 and classified as problematic. The affected element is an unknown function of the component VLAN Trunking Protocol Handler. Such manipulation leads to denial of service. This vulnerability is listed as CVE-2005-4826. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS 12.1 (Router Operating System). It has been rated as critical. Affected by this issue is an unknown code of the component VLAN Trunking Protocol Handler. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

Unspecified vulnerability in the VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(22)EA3 on Catalyst 2950T switches allows remote attackers to cause a denial of service (device reboot) via a crafted Subset-Advert message packet, a different issue than CVE-2006-4774, CVE-2006-4775, and CVE-2006-4776.

The bug was discovered 01/26/2007. The weakness was presented 01/30/2007 by David Barroso Berrueta and Alfredo Andres Omella (Website). The advisory is shared for download at s21sec.com. This vulnerability is handled as CVE-2005-4826 since 01/30/2007. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

It is declared as proof-of-concept.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at cisco.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 (32023), SecurityFocus (BID 22268†), OSVDB (33013†), Secunia (SA23892†) and SecurityTracker (ID 1017568†). See VDB-2892 for similar entry. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Patch: cisco.com

Timelineinfo

12/31/2005 🔍
01/26/2007 +391 days 🔍
01/26/2007 +0 days 🔍
01/26/2007 +0 days 🔍
01/29/2007 +3 days 🔍
01/30/2007 +1 days 🔍
01/30/2007 +0 days 🔍
01/30/2007 +0 days 🔍
01/30/2007 +0 days 🔍
01/31/2007 +0 days 🔍
02/06/2007 +6 days 🔍
07/14/2019 +4541 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: s21sec.com
Researcher: David Barroso Berrueta, Alfredo Andres Omella
Status: Confirmed

CVE: CVE-2005-4826 (🔍)
GCVE (CVE): GCVE-0-2005-4826
GCVE (VulDB): GCVE-100-2888

OVAL: 🔍

X-Force: 32023
SecurityFocus: 22268 - Multiple Cisco Switches VLAN Trunking Protocol Packet Handling Denial Of Service Vulnerability
Secunia: 23892 - Cisco IOS VTP Denial of Service Vulnerability, Less Critical
OSVDB: 33013 - Cisco IOS Unspecified Malformed VLAN Trunking Protocol (VTP) DoS
SecurityTracker: 1017568
Vulnerability Center: 14208 - [cisco-sr-20070129-vtp] Cisco Switches DoS due to Mishandling of VLAN Trunking Protocol Packets, Low
Vupen: ADV-2007-0414

See also: 🔍

Entryinfo

Created: 01/31/2007 12:06
Updated: 07/14/2019 12:14
Changes: 01/31/2007 12:06 (82), 07/14/2019 12:14 (2)
Complete: 🔍
Cache ID: 216:940:103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!