CVE-2008-6123

CVE-2008-6123 is a medium-severity vulnerability in Net-snmp with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 3% (85th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-863
• Affected product: Net-snmp
• Published: 2009-02-12
• Last modified: 2026-06-16

Description

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."

Frequently asked questions

What is CVE-2008-6123?

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."

How severe is CVE-2008-6123?

CVE-2008-6123 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-6123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-6123?

CVE-2008-6123 primarily affects Net-snmp. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-6123?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-6123 published?

CVE-2008-6123 was published on 2009-02-12 and last updated on 2026-06-16.

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

Affected products (5)

• cpe:2.3:a:net-snmp:net-snmp:*:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:10.3-11.1:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:11.2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise:9-11:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:3.0:*:*:*:*:*:*:*

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