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

1) Input validation error

EUVDB-ID: #VU32864

Risk: Medium

CVSSv4.0: 2.7 [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]

CVE-ID: CVE-2008-6123

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:net-snmp_sourceforge_net:net-snmp:5.0.9:*:*:*:*:*:*:*

External links

https://bugs.gentoo.org/show_bug.cgi?id=250429
https://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html
https://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
https://lists.opensuse.org/opensuse-security-announce/2010-02/msg00003.html
https://net-snmp.svn.sourceforge.net/viewvc/net-snmp/trunk/net-snmp/snmplib/snmpUDPDomain.c?r1=17325&r2=17367&pathrev=17367
https://net-snmp.svn.sourceforge.net/viewvc/net-snmp?view=rev&revision=17367
https://secunia.com/advisories/34499
https://secunia.com/advisories/35416
https://secunia.com/advisories/35685
https://www.openwall.com/lists/oss-security/2009/02/12/2
https://www.openwall.com/lists/oss-security/2009/02/12/4
https://www.openwall.com/lists/oss-security/2009/02/12/7
https://www.redhat.com/support/errata/RHSA-2009-0295.html
https://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

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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