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TITLE:
Nortel Switched Firewall Products SNMPv3 HMAC Authentication Bypass

SECUNIA ADVISORY ID:
SA31905

VERIFY ADVISORY:
http://secunia.com/advisories/31905/

CRITICAL:
Less critical

IMPACT:
Spoofing

WHERE:
>From local network

OPERATING SYSTEM:
Nortel Switched Firewall 6000 Series
http://secunia.com/advisories/product/6124/
Nortel Switched Firewall 5100 Series
http://secunia.com/advisories/product/6125/

DESCRIPTION:
Nortel has acknowledged a vulnerability in Nortel Switched Firewall
products, which can be exploited by malicious people to spoof
authenticated SNMPv3 packets.

For more information:
SA30574

SOLUTION:
The vendor is currently working on a fix.

The vendor recommends to disable SNMPv3 as a workaround.

ORIGINAL ADVISORY:
Nortel Networks:
http://www116.nortel.com/pub/repository/CLARIFY/DOCUMENT/2008/36/023834-02.pdf

OTHER REFERENCES:
SA30574:
http://secunia.com/advisories/30574/

US-CERT VU#878044:
http://www.kb.cert.org/vuls/id/878044

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