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Netsikker nu! 2008
 
Nortel Communication Server Command Processing Denial of Service
Secunia Advisory: SA30844
Release Date: 2008-06-26
Popularity: 1,280 views

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

OS:Nortel Communication Server 1000

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Description:
A vulnerability has been reported in Nortel Communication Server, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the Signaling Server when processing certain commands sent via the ELAN (Embedded LAN). This can be exploited to cause a DoS via a specially crafted, overly large command.

The vulnerability is reported in version 4.5, 5.0, and 5.5.

Solution:
The vendor is reportedly working on a fix.

Restrict network access to the affected device.

Provided and/or discovered by:
VoIPshield

Original Advisory:
Nortel:
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=738892

VoIPshield:
http://www.voipshield.com/research-details.php?id=59


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