How severe is CVE-2013-6230?

CVE-2013-6230 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2013-6230 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6230?

CVE-2013-6230 primarily affects Isc Bind. In total, 58 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-6230?

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

When was CVE-2013-6230 published?

CVE-2013-6230 was published on 2013-11-08 and last updated on 2026-06-17.

CVE-2013-6230

CVE-2013-6230 is a medium-severity vulnerability in Isc Bind with a CVSS 2.0 base score of 6.8. 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Isc Bind
Published: 2013-11-08
Last modified: 2026-06-17

Description

The Winsock WSAIoctl API in Microsoft Windows Server 2008, as used in ISC BIND 9.6-ESV before 9.6-ESV-R10-P1, 9.8 before 9.8.6-P1, 9.9 before 9.9.4-P1, 9.9.3-S1, 9.9.4-S1, and other products, does not properly support the SIO_GET_INTERFACE_LIST command for netmask 255.255.255.255, which allows remote attackers to bypass intended IP address restrictions by leveraging misinterpretation of this netmask as a 0.0.0.0 netmask.

Frequently asked questions

What is CVE-2013-6230?: The Winsock WSAIoctl API in Microsoft Windows Server 2008, as used in ISC BIND 9.6-ESV before 9.6-ESV-R10-P1, 9.8 before 9.8.6-P1, 9.9 before 9.9.4-P1, 9.9.3-S1, 9.9.4-S1, and other products, does not properly support the SIO_GET_INTERFACE_LIST command for netmask 255.255.255.255, which allows remote attackers to bypass intended IP address restrictions by leveraging misinterpretation of this netmask as a 0.0.0.0 netmask.
How severe is CVE-2013-6230?: CVE-2013-6230 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2013-6230 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6230?: CVE-2013-6230 primarily affects Isc Bind. In total, 58 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-6230?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-6230 published?: CVE-2013-6230 was published on 2013-11-08 and last updated on 2026-06-17.

References

Affected products (58)

cpe:2.3:a:isc:bind:9.6:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.6:r5_p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.6:r6_b1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.6:r6_rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.6:r6_rc2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.6:r7_p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.6:r7_p2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.6:r9_p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.0:a1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.0:b1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.0:p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.0:p2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.0:p4:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.0:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.1:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.1:b1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.1:b2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.1:b3:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.1:p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.1:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.2:b1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.2:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.2:rc2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.3:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.3:p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.3:p2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.4:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.5:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.5:b1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.5:b2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.5:p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.5:p2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.5:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.5:rc2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.8.6:b1:*:*:*:*:*:*
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:*:*:*:*:*:*

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.

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