A vulnerability exists in multiple Symantec security appliances that could allow a remote attacker to modify the configuration of the device using SNMP.
The Simple Network Management Protocol (SNMP) enables network and system administrators to remotely monitor and configure devices on the network (devices such as switches and routers). Symantec's Firewall/VPN and Gateway Security appliances support the SNMP protocol for management purposes. Certain versions of the Firewall/VPN and Gateway Security appliances contain a default SNMP community string that unintentionally grants read-write access to many SNMP objects. The administrative interface used to manage this device does not allow the community string to be changed nor allow the service to be disabled. By connecting to the SNMP port on an affected device and issuing SNMP SET/GET requests from source port 53/udp, a remote attacker could view and modify the configuration of that device.
This vulnerability allows attackers to read and modify any SNMP object present on an affected device. Attackers exploiting this vulnerability can view and modify the configuration of these devices. Normally, you could mitigate against this vulnerability by restricting network access to the SNMP service. However, there is a vulnerability in the packet filtering feature of the Firewall/VPN and Gateway Security appliances that could allow an attacker to send packets to this service by specifying a source port of 53/udp (VU#329230).
This vulnerability was reported by Symantec. Symantec credits Mike Sues and the Rigel Kent Security & Advisory Services for discovering the vulnerability.
This document was written by Damon Morda.
|Date First Published:||2004-10-20|
|Date Last Updated:||2004-10-20 14:36 UTC|