CVE-2016-2775

Name: CVE-2016-2775
Creator: NVD / NIST
Published: 2016-07-19T22:59:00.147+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 63.35%

Last modified Jun 17, 2026

CVE-2016-2775 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. ISC BIND 9.x before 9.9.9-P2, 9.10.x before 9.10.4-P2, and 9.11.x before 9.11.0b2, when lwresd or the named lwres option is enabled, allows remote attackers to cause a denial of service (daemon crash) via a long request that uses the lightweight resolver protocol.. EPSS estimates a 63.35% chance of exploitation in the next 30 days.

Description

ISC BIND 9.x before 9.9.9-P2, 9.10.x before 9.10.4-P2, and 9.11.x before 9.11.0b2, when lwresd or the named lwres option is enabled, allows remote attackers to cause a denial of service (daemon crash) via a long request that uses the lightweight resolver protocol.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

63.35%

99.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Hp	Hp-Ux	b.11.31
Isc	Bind	>= 9.0, <= 9.9.8
Isc	Bind	>= 9.10.0, <= 9.10.3
Isc	Bind	9.9.9
Isc	Bind	9.10.4
Isc	Bind	9.11.0
Fedoraproject	Fedora	23
Fedoraproject	Fedora	24
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Eus	7.2
Redhat	Enterprise Linux Eus	7.3
Redhat	Enterprise Linux Eus	7.4
Redhat	Enterprise Linux Eus	7.5
Redhat	Enterprise Linux Eus	7.6
Redhat	Enterprise Linux Eus	7.7
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Server Aus	7.2
Redhat	Enterprise Linux Server Aus	7.3
Redhat	Enterprise Linux Server Aus	7.6
Redhat	Enterprise Linux Server Aus	7.7
Redhat	Enterprise Linux Server Tus	7.2
Redhat	Enterprise Linux Server Tus	7.3
Redhat	Enterprise Linux Server Tus	7.6
Redhat	Enterprise Linux Server Tus	7.7
Redhat	Enterprise Linux Workstation	6.0
Redhat	Enterprise Linux Workstation	7.0

References

http://www.securityfocus.com/bid/92037Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036360Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHBA-2017:0651Third Party Advisory
https://access.redhat.com/errata/RHBA-2017:1767Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2533Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05321107Patch, Vendor Advisory
https://kb.isc.org/article/AA-01393/74/CVE-2016-2775Patch, Vendor Advisory
https://kb.isc.org/article/AA-01435Broken Link
https://kb.isc.org/article/AA-01436Broken Link
https://kb.isc.org/article/AA-01438Broken Link
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7T2WJP5ELO4ZRSBXSETIZ3GAO6KOEFTA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZUCSMEOZIZ2R2SKA4FPLTOVZHJBAOWC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJ5STNEUHBNEPUHJT7CYEVSMATFYMIX7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TT754KDUJTKOASJODJX7FKHCOQ6EC7UX/
https://security.gentoo.org/glsa/201610-07Third Party Advisory
https://security.netapp.com/advisory/ntap-20160722-0002/Third Party Advisory
http://www.securityfocus.com/bid/92037Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036360Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHBA-2017:0651Third Party Advisory
https://access.redhat.com/errata/RHBA-2017:1767Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2533Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05321107Patch, Vendor Advisory
https://kb.isc.org/article/AA-01393/74/CVE-2016-2775Patch, Vendor Advisory
https://kb.isc.org/article/AA-01435Broken Link
https://kb.isc.org/article/AA-01436Broken Link
https://kb.isc.org/article/AA-01438Broken Link
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7T2WJP5ELO4ZRSBXSETIZ3GAO6KOEFTA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZUCSMEOZIZ2R2SKA4FPLTOVZHJBAOWC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJ5STNEUHBNEPUHJT7CYEVSMATFYMIX7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TT754KDUJTKOASJODJX7FKHCOQ6EC7UX/
https://security.gentoo.org/glsa/201610-07Third Party Advisory
https://security.netapp.com/advisory/ntap-20160722-0002/Third Party Advisory

Timeline

Published: Jul 19, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-2775?

How severe is CVE-2016-2775?

CVE-2016-2775 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 63.35% probability of exploitation in the next 30 days.

How do I fix CVE-2016-2775?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-2775?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST