CVE-2013-2266

CVE-2013-2266 is a high-severity vulnerability in Isc Bind with a CVSS 2.0 base score of 7.8. Its EPSS exploit-prediction score of 43% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

• Severity: High (CVSS 2.0 base score 7.8)
• EPSS exploit prediction: 43% (99th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Isc Bind
• Published: 2013-03-28
• Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.

How severe is CVE-2013-2266?

CVE-2013-2266 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2013-2266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-2266?

CVE-2013-2266 primarily affects Isc Bind. In total, 68 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-2266?

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-2013-2266 published?

CVE-2013-2266 was published on 2013-03-28 and last updated on 2026-06-16.

References

• 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
• 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/
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19579

Affected products (68)

• cpe:2.3:a:isc:bind:9.9.0:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:a1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:a2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:a3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:b1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:b2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.0:rc4:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.1:p1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.1:p2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.2:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.3:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.9.3:b1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.0:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.0:b1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.0:p1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.0:p2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.1:p1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.1:p2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.1:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.2:p1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.2:p2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.2:p3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.2:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.3:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.3:b1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.3:p1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.3:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.4:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.4:b1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.4:p1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.4:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.5:*:*:*:*:*:*:*

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 →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

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• CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
• CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
• CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
• CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →