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NVD / CVE Program· CNA mitre

CVE-2016-2776: buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3, and 9.11.x before 9.11.0rc3 does not properly construct responses…

HighCVSS 7.5 · v3.0—Weaponized Fix available

Noroxi assessment

Priority: This week (action score 60/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • A ready-made attack tool exists and the flaw can be exploited over the network without an account, so priority is at least “This week”.
  • Probability of exploitation in the next 30 days: 89.4% (FIRST EPSS); higher than 99.7% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: bind (Alpine:v3.2) 9.10.4_p3; bind (Alpine:v3.3) 9.10.4_p3-r0; bind9 (Debian:12) 1:9.10.3.dfsg.P4-11.

Don’t wait for the next maintenance window. Upgrade to bind (Alpine:v3.2) 9.10.4_p3; bind (Alpine:v3.3) 9.10.4_p3-r0; bind9 (Debian:12) 1:9.10.3.dfsg.P4-11 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3, and 9.11.x before 9.11.0rc3 does not properly construct responses, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted query.

Published
Sep 28, 2016
Updated
Jun 16, 2026
EPSS
89.4% · 99th percentile

Report tools

JSON

Action score

60

This week

Don’t wait for the next maintenance window.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
27 / 30 · 89.4%
Ready-made attack tool
3 / 60 · floor: at least 60

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • A fix has been released

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
iscbind
oraclelinux
oraclevm server
hphp-ux
oraclesolaris

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • hp hp-ux11.31
  • isc bindup to 9.9.9 inclusive
  • isc bind9.10.0
  • isc bind9.10.1
  • isc bind9.10.2
  • isc bind9.10.3
  • isc bind9.10.4
  • isc bind9.11.0
+8 more rows
  • oracle linux5.0
  • oracle linux6
  • oracle linux7
  • oracle solaris10.0
  • oracle solaris11.3
  • oracle vm server3.2
  • oracle vm server3.3
  • oracle vm server3.4

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.2bindbefore 9.10.4_p39.10.4_p3
Alpine:v3.3bindbefore 9.10.4_p3-r09.10.4_p3-r0
Debian:12bind9before 1:9.10.3.dfsg.P4-111:9.10.3.dfsg.P4-11
Debian:7bind9before 1:9.8.4.dfsg.P1-6+nmu2+deb7u111:9.8.4.dfsg.P1-6+nmu2+deb7u11
Debian:8bind9before 1:9.9.5.dfsg-9+deb8u71:9.9.5.dfsg-9+deb8u7
Red Hat:enterprise_linux:5::clientbindbefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:5::clientbind-debuginfobefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:5::clientbind-libsbefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:5::clientbind-sdbbefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:5::clientbind-utilsbefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:5::client_workstationbind-chrootbefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:5::client_workstationbind-develbefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:5::client_workstationbind-libbind-develbefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:5::client_workstationbind97before 32:9.7.0-21.P2.el5_11.732:9.7.0-21.P2.el5_11.7
Red Hat:enterprise_linux:5::client_workstationbind97-chrootbefore 32:9.7.0-21.P2.el5_11.732:9.7.0-21.P2.el5_11.7
Red Hat:enterprise_linux:5::client_workstationbind97-debuginfobefore 32:9.7.0-21.P2.el5_11.732:9.7.0-21.P2.el5_11.7
Red Hat:enterprise_linux:5::client_workstationbind97-develbefore 32:9.7.0-21.P2.el5_11.732:9.7.0-21.P2.el5_11.7
Red Hat:enterprise_linux:5::client_workstationbind97-libsbefore 32:9.7.0-21.P2.el5_11.732:9.7.0-21.P2.el5_11.7
Red Hat:enterprise_linux:5::client_workstationbind97-utilsbefore 32:9.7.0-21.P2.el5_11.732:9.7.0-21.P2.el5_11.7
Red Hat:enterprise_linux:5::client_workstationcaching-nameserverbefore 30:9.3.6-25.P1.el5_11.930:9.3.6-25.P1.el5_11.9
Red Hat:enterprise_linux:6::clientbindbefore 32:9.8.2-0.47.rc1.el6_8.132:9.8.2-0.47.rc1.el6_8.1
Red Hat:enterprise_linux:6::clientbind-chrootbefore 32:9.8.2-0.47.rc1.el6_8.132:9.8.2-0.47.rc1.el6_8.1
Red Hat:enterprise_linux:6::clientbind-debuginfobefore 32:9.8.2-0.47.rc1.el6_8.132:9.8.2-0.47.rc1.el6_8.1
Red Hat:enterprise_linux:6::clientbind-develbefore 32:9.8.2-0.47.rc1.el6_8.132:9.8.2-0.47.rc1.el6_8.1

+56

Same product

isc: all records

Other highest-scoring records for the same primary product.

  • CVE-2015-5477named in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion…KEV
    90Now
  • CVE-2020-8617A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c
    60This week
  • CVE-2020-8625A vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack
    52Plan

Published before and after this one in the same product

  • ← EarlierCVE-2016-6170Jul 6, 2016 · ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service…
    38Monitor
  • ← EarlierCVE-2016-2775Jul 19, 2016 · 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…
    42Plan
  • Later →CVE-2016-2848Oct 21, 2016 · ISC BIND 9.1.0 through 9.8.4-P2 and 9.9.0 through 9.9.2-P2 allows remote attackers to cause a denial of service (assertion failure and…
    38Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:bind9.10.4_p3 · Alpine:v3.2Package registry (OSV)
debian:bind91:9.10.3.dfsg.P4-11 · Debian:12Package registry (OSV)
red hat:bind30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:bind-chroot30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:bind-debuginfo30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:bind-devel30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:bind-libbind-devel30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:bind-libs30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:bind-libs-lite32:9.9.4-29.el7_2.4 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:bind-license32:9.9.4-29.el7_2.4 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:bind-lite-devel32:9.9.4-29.el7_2.4 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:bind-sdb30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:bind-utils30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:caching-nameserver30:9.3.6-25.P1.el5_11.9 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
suse:bind9.9.9P1-46.1 · SUSE:Linux Enterprise Desktop 12 SP1Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrydos2016-10-04
Metasploit moduleauxiliary/dos/dns/bind_tsigBIND TSIG Query Denial of Serviceauxiliary2016-09-27
Proof-of-concept repository on GitHubstars:272016-09-30

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-1 d
  2. Published
  3. First PoC+2 d
  4. TodayNov 15, 2026+3700 d

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Show all references (15 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records