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ZyXEL ZyNOS Fragmented IP Packets Denial of Service
Secunia Advisory: SA15463
Release Date: 2005-05-24
Last Update: 2005-05-26
Popularity: 8,063 views

Critical:
Not critical
Impact: DoS
Where: From local network
Solution Status: Vendor Patch

OS:ZyXEL ZyNOS 3.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
Federico Kirschbaum has reported a vulnerability in ZyXEL ZyNOS, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the handling of malformed fragmented IP packets. This can be exploited to cause a vulnerable router to consume a large amount of CPU resources.

The vulnerability has been reported in Prestige 650R-31 running ZyNOS FW 3.40 (KO.1). Other Prestige routers and versions of ZyNOS may also be affected.

NOTE: According to the original advisory, the vulnerability was only tested on the local interface. It is therefore not currently known whether the external interface also is affected.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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