CVE-2016-9444

CVE-2016-9444 is a high-severity vulnerability in Isc Bind with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 5.0
• EPSS exploit prediction: 18% (97th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Isc Bind
• Published: 2017-01-12
• Last modified: 2026-06-17

Description

named in ISC BIND 9.x before 9.9.9-P5, 9.10.x before 9.10.4-P5, and 9.11.x before 9.11.0-P2 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DS resource record in an answer.

Frequently asked questions

What is CVE-2016-9444?

named in ISC BIND 9.x before 9.9.9-P5, 9.10.x before 9.10.4-P5, and 9.11.x before 9.11.0-P2 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DS resource record in an answer.

How severe is CVE-2016-9444?

CVE-2016-9444 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-9444 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-9444?

CVE-2016-9444 primarily affects Isc Bind. In total, 318 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-9444?

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-2016-9444 published?

CVE-2016-9444 was published on 2017-01-12 and last updated on 2026-06-17.

References

• http://rhn.redhat.com/errata/RHSA-2017-0062.html
• http://www.debian.org/security/2017/dsa-3758
• http://www.securityfocus.com/bid/95393
• http://www.securitytracker.com/id/1037582
• https://access.redhat.com/errata/RHSA-2017:1583
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05381687
• https://kb.isc.org/article/AA-01441/74/CVE-2016-9444
• https://security.gentoo.org/glsa/201708-01
• https://security.netapp.com/advisory/ntap-20180926-0005/

Affected products (318)

• 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:*:*:*:*:*:*:*
• 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:*:*:*:*:*:*

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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