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TITLE:
Nortel Multimedia Communication Server 5100 Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA32203

VERIFY ADVISORY:
http://secunia.com/advisories/32203/

CRITICAL:
Less critical

IMPACT:
Security Bypass, Spoofing, DoS

WHERE:
>From local network

SOFTWARE:
Nortel Multimedia Communication Server 5100 3.x
http://secunia.com/advisories/product/15893/
Nortel Multimedia Communication Server 5100 4.x
http://secunia.com/advisories/product/14612/

DESCRIPTION:
Some vulnerabilities have been reported in Nortel Multimedia
Communication Server 5100, which can be exploited by malicious people
to bypass certain security restrictions, conduct spoofing attacks, or
cause a DoS (Denial of Service).

1) An implementation error in the call placement mechanism can be
exploited to spoof or redirect calls.

2) Multiple errors exist in the implementation of the UNIStim File
Transfer Protocol (UFTP). These can be exploited to cause a DoS via
UFTP messages containing specially crafted "Connection Details"
fields.

The vulnerabilities are reported in version 3.0.13. Other versions
may also be affected.

SOLUTION:
Use the product only in a trusted network environment.

Vulnerability #2 is partially fixed in version 3.5.9.

PROVIDED AND/OR DISCOVERED BY:
VoIPshield

ORIGINAL ADVISORY:
Nortel:
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=775223
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=774845

VoIPshield:
http://voipshield.com/research-details.php?id=119
http://voipshield.com/research-details.php?id=120

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