ID

VAR-200512-0321

CVE

CVE-2005-4826

TITLE

Multiple Cisco switch VLAN Relay Protocol Message Handling Denial of Service Vulnerability

DESCRIPTION

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 VLAN Trunking Protocol (VTP) is Cisco's proprietary protocol for centralized management of VLANs.  If a malformed VTP packet is received, some switch devices may be overloaded. However, an attacker must know the VTP domain name and send malformed VTP packets to the port configured for relay on the switch to exploit this vulnerability. Multiple Cisco switches are prone to a denial-of-service vulnerability. An attacker can exploit this issue to cause affected devices to restart, effectively denying service to legitimate users. ---------------------------------------------------------------------- Secunia is proud to announce the availability of the Secunia Software Inspector. The Secunia Software Inspector is a free service that detects insecure versions of software that you may have installed in your system. When insecure versions are detected, the Secunia Software Inspector also provides thorough guidelines for updating the software to the latest secure version from the vendor. Try it out online: http://secunia.com/software_inspector/ ---------------------------------------------------------------------- TITLE: Cisco IOS VTP Denial of Service Vulnerability SECUNIA ADVISORY ID: SA23892 VERIFY ADVISORY: http://secunia.com/advisories/23892/ CRITICAL: Less critical IMPACT: DoS WHERE: >From local network OPERATING SYSTEM: Cisco IOS 12.x http://secunia.com/product/182/ Cisco IOS R12.x http://secunia.com/product/50/ DESCRIPTION: David Barroso Berrueta and Alfredo Andres Omella have reported a vulnerability in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service). This can be exploited to cause a device to reload by sending a specially crafted VTP packet. Successful exploitation requires knowledge of the VTP domain name and the port that is configured for trunking. PROVIDED AND/OR DISCOVERED BY: Alfredo Andres Omella and David Barroso Berrueta, S21SEC ORIGINAL ADVISORY: Cisco Advisory: http://www.cisco.com/en/US/products/products_security_response09186a00807d1a81.html 21SEC Advisory: http://www.s21sec.com/es/avisos/s21sec-034-en.txt ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

specific network environment

TYPE

other

EXTERNAL IDS

REFERENCES

CREDITS

David Barroso Berrueta dbarroso@s21sec.com Alfredo Andres Omella aandres@s21sec.com

SOURCES

LAST UPDATE DATE

2024-08-14T15:45:37.161000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE