CVE-2015-4620

CVE-2015-4620 is a high-severity vulnerability in Isc Bind with a CVSS 2.0 base score of 7.8. Its EPSS exploit-prediction score of 38% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-17.

Key facts

• Severity: High (CVSS 2.0 base score 7.8)
• EPSS exploit prediction: 38% (98th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-17
• Affected product: Isc Bind
• Published: 2015-07-08
• Last modified: 2026-06-17

Description

name.c in named in ISC BIND 9.7.x through 9.9.x before 9.9.7-P1 and 9.10.x before 9.10.2-P2, when configured as a recursive resolver with DNSSEC validation, allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) by constructing crafted zone data and then making a query for a name in that zone.

Frequently asked questions

What is CVE-2015-4620?

name.c in named in ISC BIND 9.7.x through 9.9.x before 9.9.7-P1 and 9.10.x before 9.10.2-P2, when configured as a recursive resolver with DNSSEC validation, allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) by constructing crafted zone data and then making a query for a name in that zone.

How severe is CVE-2015-4620?

CVE-2015-4620 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2015-4620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 38% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4620?

CVE-2015-4620 primarily affects Isc Bind. In total, 95 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-4620?

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-2015-4620 published?

CVE-2015-4620 was published on 2015-07-08 and last updated on 2026-06-17.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162040.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162286.html
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00013.html
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00050.html
• http://lists.opensuse.org/opensuse-updates/2015-07/msg00038.html
• http://marc.info/?l=bugtraq&m=143740940810833&w=2
• http://rhn.redhat.com/errata/RHSA-2015-1443.html
• http://rhn.redhat.com/errata/RHSA-2015-1471.html
• http://www.debian.org/security/2015/dsa-3304
• http://www.securityfocus.com/bid/75588
• http://www.securitytracker.com/id/1032799
• http://www.ubuntu.com/usn/USN-2669-1
• https://kb.isc.org/article/AA-01267
• https://kb.isc.org/article/AA-01305
• https://kb.isc.org/article/AA-01306
• https://kb.isc.org/article/AA-01307
• https://kb.isc.org/article/AA-01438
• https://kb.juniper.net/JSA10783
• https://kc.mcafee.com/corporate/index?page=content&id=SB10124
• https://security.gentoo.org/glsa/201510-01
• https://security.netapp.com/advisory/ntap-20190903-0003/

Affected products (95)

• 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:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.5:b1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.5:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.5:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.6:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.6:p1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.6:p2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.7.7:*:*:*:*:*:*:*
• 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:*:*:*:*:*:*

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-17 vulnerabilities

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• CVE-2015-2738 — Critical (CVSS 10.0): The YCbCrImageDataDeserializer::ToDataSourceSurface function in the YCbCr implementation in Mozilla Firefox before…
• CVE-2015-2737 — Critical (CVSS 10.0): The rx::d3d11::SetBufferData function in the Direct3D 11 implementation in Mozilla Firefox before 39.0, Firefox ESR…
• CVE-2015-2734 — Critical (CVSS 10.0): The CairoTextureClientD3D9::BorrowDrawTarget function in the Direct3D 9 implementation in Mozilla Firefox before 39.0,…
• CVE-2015-4335 — Critical (CVSS 10.0): Redis before 2.8.21 and 3.x before 3.0.2 allows remote attackers to execute arbitrary Lua bytecode via the eval command.
• CVE-2015-3292 — Critical (CVSS 10.0): The installer in NetApp OnCommand Workflow Automation before 2.2.1P1 and 3.x before 3.0P1 sets up the Java Debugging…

Browse all CWE-17 vulnerabilities →