CVE-2012-5166

CVE-2012-5166 is a high-severity vulnerability in Isc Bind with a CVSS 2.0 base score of 7.8. Its EPSS exploit-prediction score of 34% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

• Severity: High (CVSS 2.0 base score 7.8)
• EPSS exploit prediction: 34% (98th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-189
• Affected product: Isc Bind
• Published: 2012-10-10
• Last modified: 2026-06-16

Description

ISC BIND 9.x before 9.7.6-P4, 9.8.x before 9.8.3-P4, 9.9.x before 9.9.1-P4, and 9.4-ESV and 9.6-ESV before 9.6-ESV-R7-P4 allows remote attackers to cause a denial of service (named daemon hang) via unspecified combinations of resource records.

Frequently asked questions

What is CVE-2012-5166?

ISC BIND 9.x before 9.7.6-P4, 9.8.x before 9.8.3-P4, 9.9.x before 9.9.1-P4, and 9.4-ESV and 9.6-ESV before 9.6-ESV-R7-P4 allows remote attackers to cause a denial of service (named daemon hang) via unspecified combinations of resource records.

How severe is CVE-2012-5166?

CVE-2012-5166 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2012-5166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 34% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-5166?

CVE-2012-5166 primarily affects Isc Bind. In total, 278 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-5166?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2012-5166 published?

CVE-2012-5166 was published on 2012-10-10 and last updated on 2026-06-16.

References

• http://aix.software.ibm.com/aix/efixes/security/bind9_advisory5.asc
• http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090346.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090491.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090586.html
• http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00013.html
• http://osvdb.org/86118
• http://rhn.redhat.com/errata/RHSA-2012-1363.html
• http://rhn.redhat.com/errata/RHSA-2012-1364.html
• http://rhn.redhat.com/errata/RHSA-2012-1365.html
• http://secunia.com/advisories/50903
• http://secunia.com/advisories/50909
• http://secunia.com/advisories/50956
• http://secunia.com/advisories/51054
• http://secunia.com/advisories/51078
• http://secunia.com/advisories/51096
• http://secunia.com/advisories/51106
• http://secunia.com/advisories/51178
• http://support.apple.com/kb/HT5880
• http://www.debian.org/security/2012/dsa-2560
• http://www.ibm.com/support/docview.wss?uid=isg1IV30185
• http://www.ibm.com/support/docview.wss?uid=isg1IV30247
• http://www.ibm.com/support/docview.wss?uid=isg1IV30364
• http://www.ibm.com/support/docview.wss?uid=isg1IV30365
• http://www.ibm.com/support/docview.wss?uid=isg1IV30366
• http://www.ibm.com/support/docview.wss?uid=isg1IV30367
• http://www.ibm.com/support/docview.wss?uid=isg1IV30368
• http://www.isc.org/software/bind/advisories/cve-2012-5166
• http://www.mandriva.com/security/advisories?name=MDVSA-2012:162

Affected products (278)

• cpe:2.3:a:isc:bind:9.0:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc4:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc5:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc6:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.1:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.1:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc4:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc5:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc6:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc7:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.2:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.3:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.3:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.3:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:a1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:a2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:a3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:b1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:b2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc10:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc4:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc5:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc6:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc7:*:*:*:*:*:*

More vulnerabilities in Isc Bind

• CVE-2008-0122 — Critical (CVSS 10.0): Off-by-one error in the inet_network function in libbind in ISC BIND 9.4.2 and earlier, as used in libc in FreeBSD 6.2…
• CVE-2001-0011 — Critical (CVSS 10.0): Buffer overflow in nslookupComplain function in BIND 4 allows remote attackers to gain root privileges.
• CVE-2001-0013 — Critical (CVSS 10.0): Format string vulnerability in nslookupComplain function in BIND 4 allows remote attackers to gain root privileges.
• CVE-2001-0010 — Critical (CVSS 10.0): Buffer overflow in transaction signature (TSIG) handling code in BIND 8 allows remote attackers to gain root privileges.
• CVE-2000-1029 — Critical (CVSS 10.0): Buffer overflow in host command allows a remote attacker to execute arbitrary commands via a long response to an AXFR…
• CVE-1999-0837 — Critical (CVSS 10.0): Denial of service in BIND by improperly closing TCP sessions via so_linger.

All CVEs affecting Isc Bind →

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• CVE-2015-3834 — Critical (CVSS 10.0): Multiple integer overflows in the BnHDCP::onTransact function in media/libmedia/IHDCP.cpp in libstagefright in Android…

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