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Net-SNMP HMAC Authentication Spoofing Vulnerability
Secunia Advisory: SA30574
Release Date: 2008-06-10
Last Update: 2008-06-11
Popularity: 7,951 views

Critical:
Less critical
Impact: Spoofing
Where: From local network
Solution Status: Vendor Patch

Software:Net-snmp 5.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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

Description:
A vulnerability has been reported in Net-SNMP, which can be exploited by malicious people to spoof authenticated SNMPv3 packets.

The vulnerability is caused due to an error within the verification of the HMAC digest. This can be exploited to increase the chance of successfully spoofing a packet to 1 in 256 by sending a specially crafted SNMPv3 packet with an incomplete 1 byte HMAC digest.

Successful exploitation requires a valid username.

The vulnerability is reported in versions prior to 5.4.1.1 of the 5.4.x branch, 5.3.2.1 of the 5.3.x branch, and 5.2.4.1 of the 5.2.x branch.

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



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