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.

Published: 2012-10-10 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-5166 is rated Moderate Risk (60.3/100): CVSS High severity, with high exploitation likelihood (EPSS 41.98%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2012-5166

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-17 48.36% 41.98% -6.38%
2 2026-03-11 35.35% 48.36% +13.00%
3 2026-03-04 — 35.35% —

Full EPSS history (50 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-5166

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2012-5166

OS Trackers for CVE-2012-5166

vendor priority summary link
debian unimportant CVE-2012-5166 unimportant priority: Debian including 2 source packages (bind9, isc-dhcp), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9. https://security-tracker.debian.org/tracker/CVE-2012-5166
gentoo normal CVE-2012-5166: 1 GLSA(s) (201401-34), 1 atom(s) (net-dns/bind); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-5166
redhat high — https://access.redhat.com/security/cve/CVE-2012-5166
suse high CVE-2012-5166 severity important: SUSE including 167 source package names (bind-9.10.3P4-21.1, bind-9.11.2-1.24, …), 236 product×package rows across 36 product lines (SUSE Linux Enterprise Desktop 11 SP2, SUSE Linux Enterprise Desktop 12, … (36 product lines)): Fixed 236. https://www.suse.com/security/cve/CVE-2012-5166/
ubuntu medium CVE-2012-5166 medium priority: Ubuntu including 1 source packages (bind9), 6 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): released 5, needs-triage 1. https://ubuntu.com/security/CVE-2012-5166

Affected software / configurations for CVE-2012-5166

Vendor Product Version Raw CPE
isc bind 9.0 cpe:2.3:a:isc:bind:9.0:*:*:*:*:*:*:*
isc bind 9.0.0 cpe:2.3:a:isc:bind:9.0.0:rc1:*:*:*:*:*:*
isc bind 9.0.0 cpe:2.3:a:isc:bind:9.0.0:rc2:*:*:*:*:*:*
isc bind 9.0.0 cpe:2.3:a:isc:bind:9.0.0:rc3:*:*:*:*:*:*
isc bind 9.0.0 cpe:2.3:a:isc:bind:9.0.0:rc4:*:*:*:*:*:*
isc bind 9.0.0 cpe:2.3:a:isc:bind:9.0.0:rc5:*:*:*:*:*:*
isc bind 9.0.0 cpe:2.3:a:isc:bind:9.0.0:rc6:*:*:*:*:*:*
isc bind 9.0.1 cpe:2.3:a:isc:bind:9.0.1:*:*:*:*:*:*:*
isc bind 9.0.1 cpe:2.3:a:isc:bind:9.0.1:rc1:*:*:*:*:*:*
isc bind 9.0.1 cpe:2.3:a:isc:bind:9.0.1:rc2:*:*:*:*:*:*
isc bind 9.1 cpe:2.3:a:isc:bind:9.1:*:*:*:*:*:*:*
isc bind 9.1.0 cpe:2.3:a:isc:bind:9.1.0:rc1:*:*:*:*:*:*
isc bind 9.1.1 cpe:2.3:a:isc:bind:9.1.1:*:*:*:*:*:*:*
isc bind 9.1.1 cpe:2.3:a:isc:bind:9.1.1:rc1:*:*:*:*:*:*
isc bind 9.1.1 cpe:2.3:a:isc:bind:9.1.1:rc2:*:*:*:*:*:*
isc bind 9.1.1 cpe:2.3:a:isc:bind:9.1.1:rc3:*:*:*:*:*:*
isc bind 9.1.1 cpe:2.3:a:isc:bind:9.1.1:rc4:*:*:*:*:*:*
isc bind 9.1.1 cpe:2.3:a:isc:bind:9.1.1:rc5:*:*:*:*:*:*
isc bind 9.1.1 cpe:2.3:a:isc:bind:9.1.1:rc6:*:*:*:*:*:*
isc bind 9.1.1 cpe:2.3:a:isc:bind:9.1.1:rc7:*:*:*:*:*:*
isc bind 9.1.2 cpe:2.3:a:isc:bind:9.1.2:*:*:*:*:*:*:*
isc bind 9.1.2 cpe:2.3:a:isc:bind:9.1.2:rc1:*:*:*:*:*:*
isc bind 9.1.3 cpe:2.3:a:isc:bind:9.1.3:*:*:*:*:*:*:*
isc bind 9.1.3 cpe:2.3:a:isc:bind:9.1.3:rc1:*:*:*:*:*:*
isc bind 9.1.3 cpe:2.3:a:isc:bind:9.1.3:rc2:*:*:*:*:*:*
isc bind 9.1.3 cpe:2.3:a:isc:bind:9.1.3:rc3:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:*:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:a1:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:a2:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:a3:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:b1:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:b2:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc1:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc10:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc2:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc3:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc4:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc5:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc6:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc7:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc8:*:*:*:*:*:*
isc bind 9.2.0 cpe:2.3:a:isc:bind:9.2.0:rc9:*:*:*:*:*:*
isc bind 9.2.1 cpe:2.3:a:isc:bind:9.2.1:*:*:*:*:*:*:*
isc bind 9.2.1 cpe:2.3:a:isc:bind:9.2.1:rc1:*:*:*:*:*:*
isc bind 9.2.1 cpe:2.3:a:isc:bind:9.2.1:rc2:*:*:*:*:*:*
isc bind 9.2.2 cpe:2.3:a:isc:bind:9.2.2:*:*:*:*:*:*:*
isc bind 9.2.2 cpe:2.3:a:isc:bind:9.2.2:p2:*:*:*:*:*:*
isc bind 9.2.2 cpe:2.3:a:isc:bind:9.2.2:p3:*:*:*:*:*:*
isc bind 9.2.2 cpe:2.3:a:isc:bind:9.2.2:rc1:*:*:*:*:*:*
isc bind 9.2.3 cpe:2.3:a:isc:bind:9.2.3:*:*:*:*:*:*:*
isc bind 9.2.3 cpe:2.3:a:isc:bind:9.2.3:rc1:*:*:*:*:*:*
isc bind 9.2.3 cpe:2.3:a:isc:bind:9.2.3:rc2:*:*:*:*:*:*
isc bind 9.2.3 cpe:2.3:a:isc:bind:9.2.3:rc3:*:*:*:*:*:*
isc bind 9.2.3 cpe:2.3:a:isc:bind:9.2.3:rc4:*:*:*:*:*:*
isc bind 9.2.4 cpe:2.3:a:isc:bind:9.2.4:*:*:*:*:*:*:*
isc bind 9.2.4 cpe:2.3:a:isc:bind:9.2.4:rc2:*:*:*:*:*:*
isc bind 9.2.4 cpe:2.3:a:isc:bind:9.2.4:rc3:*:*:*:*:*:*
isc bind 9.2.4 cpe:2.3:a:isc:bind:9.2.4:rc4:*:*:*:*:*:*
isc bind 9.2.4 cpe:2.3:a:isc:bind:9.2.4:rc5:*:*:*:*:*:*
isc bind 9.2.4 cpe:2.3:a:isc:bind:9.2.4:rc6:*:*:*:*:*:*
isc bind 9.2.4 cpe:2.3:a:isc:bind:9.2.4:rc7:*:*:*:*:*:*
isc bind 9.2.4 cpe:2.3:a:isc:bind:9.2.4:rc8:*:*:*:*:*:*
isc bind 9.2.5 cpe:2.3:a:isc:bind:9.2.5:*:*:*:*:*:*:*
isc bind 9.2.5 cpe:2.3:a:isc:bind:9.2.5:b2:*:*:*:*:*:*
isc bind 9.2.5 cpe:2.3:a:isc:bind:9.2.5:rc1:*:*:*:*:*:*
isc bind 9.2.6 cpe:2.3:a:isc:bind:9.2.6:*:*:*:*:*:*:*
isc bind 9.2.6 cpe:2.3:a:isc:bind:9.2.6:rc1:*:*:*:*:*:*
isc bind 9.2.7 cpe:2.3:a:isc:bind:9.2.7:*:*:*:*:*:*:*
isc bind 9.2.7 cpe:2.3:a:isc:bind:9.2.7:rc1:*:*:*:*:*:*
isc bind 9.2.7 cpe:2.3:a:isc:bind:9.2.7:rc2:*:*:*:*:*:*
isc bind 9.2.7 cpe:2.3:a:isc:bind:9.2.7:rc3:*:*:*:*:*:*
isc bind 9.2.8 cpe:2.3:a:isc:bind:9.2.8:*:*:*:*:*:*:*
isc bind 9.2.9 cpe:2.3:a:isc:bind:9.2.9:*:*:*:*:*:*:*
isc bind 9.2.9 cpe:2.3:a:isc:bind:9.2.9:rc1:*:*:*:*:*:*
isc bind 9.3 cpe:2.3:a:isc:bind:9.3:*:*:*:*:*:*:*
isc bind 9.3.0 cpe:2.3:a:isc:bind:9.3.0:*:*:*:*:*:*:*
isc bind 9.3.0 cpe:2.3:a:isc:bind:9.3.0:b2:*:*:*:*:*:*
isc bind 9.3.0 cpe:2.3:a:isc:bind:9.3.0:b3:*:*:*:*:*:*
isc bind 9.3.0 cpe:2.3:a:isc:bind:9.3.0:b4:*:*:*:*:*:*
isc bind 9.3.0 cpe:2.3:a:isc:bind:9.3.0:rc1:*:*:*:*:*:*

References for CVE-2012-5166

URL Tags
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
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.securityfocus.com/bid/55852
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2012&m=slackware-security.536004
http://www.xerox.com/download/security/security-bulletin/16287-4d6b7b0c81f7b/cert_XRX13-003_v1.0.pdf
https://blogs.oracle.com/sunsecurity/entry/cve_2012_5166_denial_of
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952488
https://kb.isc.org/article/AA-00801 Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19706
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