Cisco VLAN Trunking Protocol Vulnerability (cisco-sr-20081105-vtp)

The VTP protocol implementation in Cisco IOS is potentially vulnerable to a denial of service attack via a specially crafted VTP packet sent from the local network segment when operating in either server or client VTP mode. When the device receives the specially crafted VTP packet, the switch may...

Cisco VLAN trunking DoS

Switch reloads on malformed VTP packet...

RE: DoS code for Cisco VLAN Trunking Protocol Vulnerability

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, This is Paul Oxman with Cisco PSIRT. For mitigations and workarounds, please consult the Cisco Security Response available at: http://www.cisco.com/warp/public/707/cisco-sr-20081105-vtp.shtml Regards From: showrun.lee mailto:[email protected]...

Cisco - VLAN Trunking Protocol Denial of Service

Cisco - VLAN Trunking Protocol Denial of Service /DoS code for Cisco VLAN Trunking Protocol Vulnerability vulerability discription: http://www.cisco.com/warp/public/707/cisco-sr-20081105-vtp.shtml To Known: 1.the switch must in Server/Client Mode. 2.the port ,attacker connected,must be in trunk...

Cisco VLAN Trunking Protocol Denial of Service Exploit

Exploit for hardware platform in category dos / poc ====================================================== Cisco VLAN Trunking Protocol Denial of Service Exploit ====================================================== /DoS code for Cisco VLAN Trunking Protocol Vulnerability vulerability discriptio...

Cisco VLAN Trunking Protocol Denial Of Service

/DoS code for Cisco VLAN Trunking Protocol Vulnerability vulerability discription: http://www.cisco.com/warp/public/707/cisco-sr-20081105-vtp.shtml To Known: 1.the switch must in Server/Client Mode. 2.the port ,attacker connected,must be in trunk Mode. Cisco Ethernet ports with no configuration a...

Cisco - VLAN Trunking Protocol Denial of Service

/DoS code for Cisco VLAN Trunking Protocol Vulnerability vulerability discription: http://www.cisco.com/warp/public/707/cisco-sr-20081105-vtp.shtml To Known: 1.the switch must in Server/Client Mode. 2.the port ,attacker connected,must be in trunk Mode. Cisco Ethernet ports with no configuration a...

Cisco IOS和CatOS VTP报文处理拒绝服务漏洞

BUGTRAQ ID: 32120 Cisco IOS是思科网络设备中所使用的互联网操作系统。 某些Cisco IOS和CatOS的VTP协议实现中存在拒绝服务漏洞。如果设备以服务器或客户端VTP模式运行时，攻击者从本地网段发送特制的VTP报文就会导致交换机崩溃并重载或挂起。报文必须明确的发送给用作中继端口的交换机接口。 Cisco CatOS Cisco IOS 临时解决方法： 对于不需要使用VTP的设备，管理员应通过vtp mode transparent命令将VTP模式设置为透明。 厂商补丁： Cisco -----...

CVE-2008-4963

Unspecified vulnerability in the VLAN Trunking Protocol VTP implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service device reload or hang via a crafted VTP packet sent to a switch interface configured as a trunk...

Code injection

Unspecified vulnerability in the VLAN Trunking Protocol VTP implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service device reload or hang via a crafted VTP packet sent to a switch interface configured as a trunk...

CVE-2008-4963

Unspecified vulnerability in the VLAN Trunking Protocol VTP implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service device reload or hang via a crafted VTP packet sent to a switch interface configured as a trunk...

CVE-2008-4963

The CVE-2008-4963 entry concerns Cisco’s VLAN Trunking Protocol (VTP) in Cisco IOS/CatOS. The vulnerability arises when VTP is not in transparent mode, allowing a remote attacker to send a crafted VTP packet to a switch interface configured as a trunk port, which can cause a device reload or hang...

CVE-2005-4826

CVE-2005-4826 concerns Cisco IOS 12.1(22)EA3 on Catalyst 2950T where the VLAN Trunking Protocol (VTP) can be abused by a crafted Subset-Advert packet to cause a device reboot (DoS). Related entries (CVE-2006-4774/75/76) describe VTP-related crashes and near-arbitrary-code risk via VTP summary adv...

多个Cisco交换机VLAN中继协议报文处理拒绝服务漏洞

VLAN中继协议（VTP）是Cisco的私有协议，用于集中管理VLAN。 Cisco交换机在处理某些畸形VTP报文时存在漏洞，远程攻击者可能利用此漏洞导致设备拒绝服务。 如果接收到了畸形的VTP报文的话，某些交换机设备就可能重载。但攻击者必须要知道VTP域名并将畸形的VTP报文发送给交换机上所配置的用于中继的端口才能利用这个漏洞。 Cisco Catalyst 3750 Cisco Catalyst 3550 Cisco Catalyst 3500XL Cisco Catalyst 2955 Cisco Catalyst 2950 Cisco Catalyst 2900XL...

Re: [Full-disclosure] S21sec-034-en: Cisco VTP DoS vulnerability

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello - Cisco has posted a Security Response in reference to this issue at the following URL: http://www.cisco.com/warp/public/707/cisco-sr-20070129-vtp.shtml Cisco Response ============== An issue has been reported to the Cisco PSIRT involving...

Cisco Catalyst switches VTP DoS

Switch crashes on malformed VTP VLAN Trunking Protocol Subset-Advert message...

S21sec-034-en: Cisco VTP DoS vulnerability

ID: S21SEC-034-en Title: Cisco VTP Denial Of Service Date: 26/01/2007 Status: Vendor contacted, bug fixed Severity: Medium - DoS - remote from the local subnet Scope: Cisco Catalyst Switch denial of service Platforms: IOS Author: Alfredo Andres Omella, David Barroso Berrueta Location:...

Cisco IOS fails to properly handle summary packets in the VLAN Trunking Protocol

Overview Cisco IOS fails to properly handle summary packets in the VLAN Trunking Protocol. This vulnerability may allow a remote, unauthenticated attacker to cause a denial-of-service condition. Description Cisco's VLAN Trunking Protocol VTP provides the ability to manage the addition, deletion,...

Cisco IOS fails to properly verify the VTP configuration revision number

Overview Cisco IOS fails to properly verify the VTP configuration revision number. This vulnerability may allow a remote, unauthenticated attacker to prevent changes to the VLAN database from being properly propagated throughout the VTP domain. Description Cisco's VLAN Trunking Protocol VTP...

Cisco IOS contains buffer overflow in VTP VLAN name handling

Overview Cisco IOS fails to properly handle specially crafted VTP summary advertisement with overly long VLAN name. This vulnerability may allow a remote, unauthenticated attacker to execute arbitrary code or cause a denial-of-service condition. Description Cisco's VLAN Trunking Protocol VTP...