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[ GLSA 200808-02 ] Net-SNMP: Multiple vulnerabilities
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PostPosted: Wed Aug 06, 2008 2:26 am    Post subject: [ GLSA 200808-02 ] Net-SNMP: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: Net-SNMP: Multiple vulnerabilities (GLSA 200808-02)
Severity: normal
Exploitable: remote
Date: August 06, 2008
Bug(s): #222265, #225105
ID: 200808-02


Multiple vulnerabilities in Net-SNMP allow for authentication bypass in
snmpd and execution of arbitrary code in Perl applications using Net-SMNP.


Net-SNMP is a collection of tools for generating and retrieving SNMP
data. The SNMPv3 protocol uses a keyed-Hash Message Authentication Code
(HMAC) to verify data integrity and authenticity of SNMP messages.

Affected Packages

Package: net-analyzer/net-snmp
Vulnerable: <
Unaffected: >=
Architectures: All supported architectures


Wes Hardaker reported that the SNMPv3 HMAC verification relies on the
client to specify the HMAC length (CVE-2008-0960). John Kortink
reported a buffer overflow in the Perl bindings of Net-SNMP when
processing the OCTETSTRING in an attribute value pair (AVP) received by
an SNMP agent (CVE-2008-2292).


An attacker could send SNMPv3 packets to an instance of snmpd providing
a valid user name and an HMAC length value of 1, and easily conduct
brute-force attacks to bypass SNMP authentication. An attacker could
further entice a user to connect to a malicious SNMP agent with an SNMP
client using the Perl bindings, possibly resulting in the execution of
arbitrary code.


There is no known workaround at this time.


All Net-SNMP users should upgrade to the latest version:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/net-snmp-"



Last edited by GLSA on Tue Nov 06, 2012 4:26 am; edited 4 times in total
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