GEN:SID | 1:2339 |
Message | TFTP NULL command attempt |
Summary | This event is generated when an attempt is made to exploit a known vulnerability in Verilink Netengine Broadband Routers.
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Impact | Denial of Service (DoS)
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Detailed Information | TFTP is used to transfer files between hosts. This event is indicative of spurious activity in TFTP traffic from a host to a router.
It is possible for an attacker to expoit a DoS condition in Netengine routers. If a UDP packet containing a double-null opcode is sent to the router's TFTP port the router may crash, thus causing the DoS.
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Affected Systems | Verilink Netengine Broadband Routers
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Attack Scenarios | An attacker may use a publicly available exploit script to take advantage of the vulnerability.
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Ease of Attack | Simple. Exploit code exists.
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Corrective Action | Apply the appropriate vendor supplied patches.
Upgrade to the latest non-affected version of the software.
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Additional References | |
Rule References | bugtraq: 7575
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