CVE-2013-2266

libdns in ISC BIND 9.7.x and 9.8.x before 9.8.4-P2, 9.8.5 before 9.8.5b2, 9.9.x before 9.9.2-P2, and 9.9.3 before 9.9.3b2 on UNIX platforms allows remote attackers to cause a denial of service (memory consumption) via a crafted regular expression, as demonstrated by a memory-exhaustion attack against a machine running a named process.

Published: 2013-03-28 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-2266 is rated Moderate Risk (63.7/100): CVSS High severity, with high exploitation likelihood (EPSS 42.85%, 99th 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-2013-2266

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 2026-06-15 44.84% 42.85% -1.99%
2 2026-03-04 46.33% 44.84% -1.48%
3 2026-03-03 — 46.33% —

Full EPSS history (47 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-2266

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-2013-2266

OS Trackers for CVE-2013-2266

vendor priority summary link
debian not yet assigned CVE-2013-2266 not yet assigned priority: Debian including 1 source packages (bind9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-2266
gentoo normal CVE-2013-2266: 1 GLSA(s) (201401-34), 1 atom(s) (net-dns/bind); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-2266
redhat high — https://access.redhat.com/security/cve/CVE-2013-2266
suse high CVE-2013-2266 severity important: SUSE including 194 source package names (bind-9.10.3P4-21.1, bind-9.11.2-1.24, …), 285 product×package rows across 39 product lines (SUSE Linux Enterprise Desktop 11 SP2, SUSE Linux Enterprise Desktop 12, … (39 product lines)): Fixed 282, Known Not Affected 3. https://www.suse.com/security/cve/CVE-2013-2266/
ubuntu medium CVE-2013-2266 medium priority: Ubuntu including 1 source packages (bind9), 6 status rows across 6 suites (hardy, lucid, oneiric, precise, quantal, upstream): released 5, not-affected 1. https://ubuntu.com/security/CVE-2013-2266

Affected software / configurations for CVE-2013-2266

Vendor Product Version Raw CPE
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:*:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:a1:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:a2:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:a3:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:b1:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:b2:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:rc1:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:rc2:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:rc3:*:*:*:*:*:*
isc bind 9.9.0 cpe:2.3:a:isc:bind:9.9.0:rc4:*:*:*:*:*:*
isc bind 9.9.1 cpe:2.3:a:isc:bind:9.9.1:*:*:*:*:*:*:*
isc bind 9.9.1 cpe:2.3:a:isc:bind:9.9.1:p1:*:*:*:*:*:*
isc bind 9.9.1 cpe:2.3:a:isc:bind:9.9.1:p2:*:*:*:*:*:*
isc bind 9.9.2 cpe:2.3:a:isc:bind:9.9.2:*:*:*:*:*:*:*
isc bind 9.9.3 cpe:2.3:a:isc:bind:9.9.3:*:*:*:*:*:*:*
isc bind 9.9.3 cpe:2.3:a:isc:bind:9.9.3:b1:*:*:*:*:*:*
isc bind 9.7.0 cpe:2.3:a:isc:bind:9.7.0:*:*:*:*:*:*:*
isc bind 9.7.0 cpe:2.3:a:isc:bind:9.7.0:b1:*:*:*:*:*:*
isc bind 9.7.0 cpe:2.3:a:isc:bind:9.7.0:p1:*:*:*:*:*:*
isc bind 9.7.0 cpe:2.3:a:isc:bind:9.7.0:p2:*:*:*:*:*:*
isc bind 9.7.0 cpe:2.3:a:isc:bind:9.7.0:rc1:*:*:*:*:*:*
isc bind 9.7.0 cpe:2.3:a:isc:bind:9.7.0:rc2:*:*:*:*:*:*
isc bind 9.7.1 cpe:2.3:a:isc:bind:9.7.1:*:*:*:*:*:*:*
isc bind 9.7.1 cpe:2.3:a:isc:bind:9.7.1:p1:*:*:*:*:*:*
isc bind 9.7.1 cpe:2.3:a:isc:bind:9.7.1:p2:*:*:*:*:*:*
isc bind 9.7.1 cpe:2.3:a:isc:bind:9.7.1:rc1:*:*:*:*:*:*
isc bind 9.7.2 cpe:2.3:a:isc:bind:9.7.2:*:*:*:*:*:*:*
isc bind 9.7.2 cpe:2.3:a:isc:bind:9.7.2:p1:*:*:*:*:*:*
isc bind 9.7.2 cpe:2.3:a:isc:bind:9.7.2:p2:*:*:*:*:*:*
isc bind 9.7.2 cpe:2.3:a:isc:bind:9.7.2:p3:*:*:*:*:*:*
isc bind 9.7.2 cpe:2.3:a:isc:bind:9.7.2:rc1:*:*:*:*:*:*
isc bind 9.7.3 cpe:2.3:a:isc:bind:9.7.3:*:*:*:*:*:*:*
isc bind 9.7.3 cpe:2.3:a:isc:bind:9.7.3:b1:*:*:*:*:*:*
isc bind 9.7.3 cpe:2.3:a:isc:bind:9.7.3:p1:*:*:*:*:*:*
isc bind 9.7.3 cpe:2.3:a:isc:bind:9.7.3:rc1:*:*:*:*:*:*
isc bind 9.7.4 cpe:2.3:a:isc:bind:9.7.4:*:*:*:*:*:*:*
isc bind 9.7.4 cpe:2.3:a:isc:bind:9.7.4:b1:*:*:*:*:*:*
isc bind 9.7.4 cpe:2.3:a:isc:bind:9.7.4:p1:*:*:*:*:*:*
isc bind 9.7.4 cpe:2.3:a:isc:bind:9.7.4:rc1:*:*:*:*:*:*
isc bind 9.7.5 cpe:2.3:a:isc:bind:9.7.5:*:*:*:*:*:*:*
isc bind 9.7.5 cpe:2.3:a:isc:bind:9.7.5:b1:*:*:*:*:*:*
isc bind 9.7.5 cpe:2.3:a:isc:bind:9.7.5:rc1:*:*:*:*:*:*
isc bind 9.7.5 cpe:2.3:a:isc:bind:9.7.5:rc2:*:*:*:*:*:*
isc bind 9.7.6 cpe:2.3:a:isc:bind:9.7.6:*:*:*:*:*:*:*
isc bind 9.7.6 cpe:2.3:a:isc:bind:9.7.6:p1:*:*:*:*:*:*
isc bind 9.7.6 cpe:2.3:a:isc:bind:9.7.6:p2:*:*:*:*:*:*
isc bind 9.8.0 cpe:2.3:a:isc:bind:9.8.0:*:*:*:*:*:*:*
isc bind 9.8.0 cpe:2.3:a:isc:bind:9.8.0:a1:*:*:*:*:*:*
isc bind 9.8.0 cpe:2.3:a:isc:bind:9.8.0:b1:*:*:*:*:*:*
isc bind 9.8.0 cpe:2.3:a:isc:bind:9.8.0:p1:*:*:*:*:*:*
isc bind 9.8.0 cpe:2.3:a:isc:bind:9.8.0:p2:*:*:*:*:*:*
isc bind 9.8.0 cpe:2.3:a:isc:bind:9.8.0:p4:*:*:*:*:*:*
isc bind 9.8.0 cpe:2.3:a:isc:bind:9.8.0:rc1:*:*:*:*:*:*
isc bind 9.8.1 cpe:2.3:a:isc:bind:9.8.1:*:*:*:*:*:*:*
isc bind 9.8.1 cpe:2.3:a:isc:bind:9.8.1:b1:*:*:*:*:*:*
isc bind 9.8.1 cpe:2.3:a:isc:bind:9.8.1:b2:*:*:*:*:*:*
isc bind 9.8.1 cpe:2.3:a:isc:bind:9.8.1:b3:*:*:*:*:*:*
isc bind 9.8.1 cpe:2.3:a:isc:bind:9.8.1:p1:*:*:*:*:*:*
isc bind 9.8.1 cpe:2.3:a:isc:bind:9.8.1:rc1:*:*:*:*:*:*
isc bind 9.8.2 cpe:2.3:a:isc:bind:9.8.2:b1:*:*:*:*:*:*
isc bind 9.8.2 cpe:2.3:a:isc:bind:9.8.2:rc1:*:*:*:*:*:*
isc bind 9.8.2 cpe:2.3:a:isc:bind:9.8.2:rc2:*:*:*:*:*:*
isc bind 9.8.3 cpe:2.3:a:isc:bind:9.8.3:*:*:*:*:*:*:*
isc bind 9.8.3 cpe:2.3:a:isc:bind:9.8.3:p1:*:*:*:*:*:*
isc bind 9.8.3 cpe:2.3:a:isc:bind:9.8.3:p2:*:*:*:*:*:*
isc bind 9.8.4 cpe:2.3:a:isc:bind:9.8.4:*:*:*:*:*:*:*
isc bind 9.8.5 cpe:2.3:a:isc:bind:9.8.5:*:*:*:*:*:*:*
isc bind 9.8.5 cpe:2.3:a:isc:bind:9.8.5:b1:*:*:*:*:*:*

References for CVE-2013-2266

URL Tags
http://linux.oracle.com/errata/ELSA-2014-1244
http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101500.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101603.html
http://marc.info/?l=bugtraq&m=136804614120794&w=2
http://rhn.redhat.com/errata/RHSA-2013-0689.html
http://rhn.redhat.com/errata/RHSA-2013-0690.html
http://support.apple.com/kb/HT5880
http://www.debian.org/security/2013/dsa-2656
http://www.isc.org/software/bind/advisories/cve-2013-2266 Vendor Advisory
http://www.securityfocus.com/bid/58736
http://www.ubuntu.com/usn/USN-1783-1
https://kb.isc.org/article/AA-00871/
https://kb.isc.org/article/AA-00879/ Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19579
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