SB2009021201 - Input validation error in net-snmp.sourceforge.net Net-snmp

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2008-6123)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The netsnmp_udp_fmtaddr function (snmplib/snmpUDPDomain.c) in net-snmp 5.0.9 through 5.4.2.1, when using TCP wrappers for client authorization, does not properly parse hosts.allow rules, which allows remote attackers to bypass intended access restrictions and execute SNMP queries, related to "source/destination IP address confusion."

Remediation

Install update from vendor's website.

References

• http://bugs.gentoo.org/show_bug.cgi?id=250429
• http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html
• http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00003.html
• http://net-snmp.svn.sourceforge.net/viewvc/net-snmp/trunk/net-snmp/snmplib/snmpUDPDomain.c?r1=17325&r2=17367&pathrev=17367
• http://net-snmp.svn.sourceforge.net/viewvc/net-snmp?view=rev&revision=17367
• http://secunia.com/advisories/34499
• http://secunia.com/advisories/35416
• http://secunia.com/advisories/35685
• http://www.openwall.com/lists/oss-security/2009/02/12/2
• http://www.openwall.com/lists/oss-security/2009/02/12/4
• http://www.openwall.com/lists/oss-security/2009/02/12/7
• http://www.redhat.com/support/errata/RHSA-2009-0295.html
• http://www.securitytracker.com/id?1021921
• https://bugzilla.redhat.com/show_bug.cgi?id=485211
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10289