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NVD / CVE Program· CNA mitre

CVE-2015-5477: named 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…

HighCVSS 7.5 · v3.1KEVWeaponized Fix available

Noroxi assessment

Priority: Now (action score 90/100)

  • CISA has confirmed exploitation in the wild (Oct 8, 2026). Remediation deadline for US federal agencies: Oct 11, 2026.
  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 99.5% (FIRST EPSS); higher than 99.9% 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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: bind9 (Debian:12) 1:9.9.5.dfsg-11; bind9 (Debian:6.0) 1:9.7.3.dfsg-1~squeeze16; bind9 (Debian:7) 1:9.8.4.dfsg.P1-6+nmu2+deb7u6.

Patch today or shut off access. Upgrade to bind9 (Debian:12) 1:9.9.5.dfsg-11; bind9 (Debian:6.0) 1:9.7.3.dfsg-1~squeeze16; bind9 (Debian:7) 1:9.8.4.dfsg.P1-6+nmu2+deb7u6 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 · CISA KEV · FIRST EPSS

named 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 failure and daemon exit) via TKEY queries.

Published
Jul 29, 2015
Updated
Nov 3, 2026
EPSS
99.5% · 99th percentile

Report tools

JSON

Action score

90

Now

Patch today or shut off access.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
30 / 30 · Listed
EPSS
30 / 30 · 99.5%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Oct 8, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Oct 11, 2026.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

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Follow CVE-2015-5477

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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
juniperjunos
juniperj2300
juniperj2320
juniperj2350
juniperj4300
juniperj4350
juniperj4350 nebs
juniperj6300
juniperj635 nebs
juniperj6350
juniperjx-4bri

and 65 more

Affected versions

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

  • apple os x server4.1.5
  • canonical ubuntu linux12.04
  • debian debian linux7.0
  • debian debian linux8.0
  • fedoraproject fedora21
  • fedoraproject fedora22
  • hp hp-ux11.11
  • hp hp-ux11.23
+12 more rows
  • hp hp-ux11.31
  • hp openvms5.7
  • hpe dns9.2.3
  • hpe dns9.3
  • hpe vcxbefore 9.8.18
  • isc bind9.1.0 and later · before 9.9.7
  • isc bind9.10.0 and later · before 9.10.2
  • isc bind9.10.2
  • juniper junos13.1 and later · before 13.2
  • juniper junosbefore 12.1
  • juniper junos12.1
  • juniper junos12.1r

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12bind9before 1:9.9.5.dfsg-111:9.9.5.dfsg-11
Debian:6.0bind9before 1:9.7.3.dfsg-1~squeeze161:9.7.3.dfsg-1~squeeze16
Debian:7bind9before 1:9.8.4.dfsg.P1-6+nmu2+deb7u61:9.8.4.dfsg.P1-6+nmu2+deb7u6
Debian:8bind9before 1:9.9.5.dfsg-9+deb8u21:9.9.5.dfsg-9+deb8u2
Red Hat:enterprise_linux:5::clientbindbefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:5::clientbind-debuginfobefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:5::clientbind-libsbefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:5::clientbind-sdbbefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:5::clientbind-utilsbefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:5::client_workstationbind-chrootbefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:5::client_workstationbind-develbefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:5::client_workstationbind-libbind-develbefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:5::client_workstationbind97before 32:9.7.0-21.P2.el5_11.232:9.7.0-21.P2.el5_11.2
Red Hat:enterprise_linux:5::client_workstationbind97-chrootbefore 32:9.7.0-21.P2.el5_11.232:9.7.0-21.P2.el5_11.2
Red Hat:enterprise_linux:5::client_workstationbind97-debuginfobefore 32:9.7.0-21.P2.el5_11.232:9.7.0-21.P2.el5_11.2
Red Hat:enterprise_linux:5::client_workstationbind97-develbefore 32:9.7.0-21.P2.el5_11.232:9.7.0-21.P2.el5_11.2
Red Hat:enterprise_linux:5::client_workstationbind97-libsbefore 32:9.7.0-21.P2.el5_11.232:9.7.0-21.P2.el5_11.2
Red Hat:enterprise_linux:5::client_workstationbind97-utilsbefore 32:9.7.0-21.P2.el5_11.232:9.7.0-21.P2.el5_11.2
Red Hat:enterprise_linux:5::client_workstationcaching-nameserverbefore 30:9.3.6-25.P1.el5_11.330:9.3.6-25.P1.el5_11.3
Red Hat:enterprise_linux:6::clientbindbefore 32:9.8.2-0.37.rc1.el6_7.232:9.8.2-0.37.rc1.el6_7.2
Red Hat:enterprise_linux:6::clientbind-chrootbefore 32:9.8.2-0.37.rc1.el6_7.232:9.8.2-0.37.rc1.el6_7.2
Red Hat:enterprise_linux:6::clientbind-debuginfobefore 32:9.8.2-0.37.rc1.el6_7.232:9.8.2-0.37.rc1.el6_7.2
Red Hat:enterprise_linux:6::clientbind-develbefore 32:9.8.2-0.37.rc1.el6_7.232:9.8.2-0.37.rc1.el6_7.2
Red Hat:enterprise_linux:6::clientbind-libsbefore 32:9.8.2-0.37.rc1.el6_7.232:9.8.2-0.37.rc1.el6_7.2

+48

Same product

isc: all records

Other highest-scoring records for the same primary product.

  • 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-2016-2776buffer.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…
    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-2015-1349Feb 18, 2015 · named in ISC BIND 9.7.0 through 9.9.6 before 9.9.6-P2 and 9.10.x before 9.10.1-P2, when DNSSEC validation and the managed-keys feature are…
    28Monitor
  • ← EarlierCVE-2015-4620Jul 8, 2015 · 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…
    43Plan
  • Later →CVE-2015-5722Sep 4, 2015 · buffer.c in named in ISC BIND 9.x before 9.9.7-P3 and 9.10.x before 9.10.2-P4 allows remote attackers to cause a denial of service…
    41Plan

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
debian:bind91:9.9.5.dfsg-11 · Debian:12Package registry (OSV)
red hat:bind32:9.8.2-0.37.rc1.el6_7.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:bind-chroot32:9.8.2-0.37.rc1.el6_7.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:bind-debuginfo32:9.8.2-0.37.rc1.el6_7.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:bind-devel32:9.8.2-0.37.rc1.el6_7.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:bind-libbind-devel30:9.3.6-25.P1.el5_11.3 · Red Hat:enterprise_linux:5::client_workstationPackage registry (OSV)
red hat:bind-libs32:9.8.2-0.37.rc1.el6_7.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:bind-libs-lite32:9.9.4-18.el7_1.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:bind-license32:9.9.4-18.el7_1.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:bind-lite-devel32:9.9.4-18.el7_1.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:bind-sdb32:9.8.2-0.37.rc1.el6_7.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:bind-sdb-chroot32:9.9.4-18.el7_1.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:bind-utils32:9.8.2-0.37.rc1.el6_7.2 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
suse:bind9.9.6P1-0.12.1 · SUSE:Linux Enterprise Software Development Kit 11 SP3Package 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 ×2
  • Proof-of-concept repository on GitHub ×7

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
Proof-of-concept repository on GitHub7 repositories2015-07-31 → 2020-05-11
Exploit-DB entrydos2015-08-01
Exploit-DB entrydos2015-08-05
Metasploit moduleauxiliary/dos/dns/bind_tkeyBIND TKEY Query Denial of Serviceauxiliary2015-07-28

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-2 d
  2. Published
  3. First PoC+1 d
  4. CISA KEV+4088 d
  5. TodayNov 14, 2026+4126 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: 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-19 · Data Processing Errors

CVSS vector

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

nvd-secondary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. KEV✗ → ✓
  2. CVSS7.8 → 7.5
  3. SSVC exploitation— → active
  4. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

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

All records