Vulnerability identifier: #VU32864

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2008-6123

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Net-snmp
Server applications / Remote management servers, RDP, SSH

Vendor: net-snmp.sourceforge.net

Description

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."

Mitigation
Install update from vendor's website.

Vulnerable software versions

Net-snmp: 5.0.9

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External links
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
http://bugzilla.redhat.com/show_bug.cgi?id=485211
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10289

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.