Read the docs
TI-2018-04147 Aliases CVE-2018-5740GHSA-rqpc-6vjv-w22p

A flaw in the "deny-answer-aliases" feature can cause an assertion failure in named

Priority HIGH 67CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 18 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-617.

Summary

"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2.

Why it matters now

EPSS 0.60236 99th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 18 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ISCBIND 9BIND 9 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2—No fix listedCNA
  • BIND 9 VendorISC Affected BIND 9 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2 Fixed in — No fix listed CNA

CPE configurations NVD · 21

CPEVersionsRoleVendor
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*9.7.0 to before 9.8.8; 9.9.0 to before 9.9.13; 9.10.0 to before 9.10.8; 9.11.0 to before 9.11.4; 9.12.0 to before 9.12.2; 9.13.0 to before 9.13.2VulnerableISC
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* Versions 9.7.0 to before 9.8.8; 9.9.0 to before 9.9.13; 9.10.0 to before 9.10.8; 9.11.0 to before 9.11.4; 9.12.0 to before 9.12.2; 9.13.0 to before 9.13.2 Vulnerable ·ISC
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Show 11 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*12.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:hp:hp-ux:-:*:*:*:*:*:*:*not specified by NVDVulnerableHewlett Packard Enterprise
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*15.0VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*42.3VulnerableopenSUSE
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Versions 12.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:hp:hp-ux:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Hewlett Packard Enterprise
  • cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:* Versions 42.3 Vulnerable ·openSUSE

Remediation

Red Hat 2 advisories

  • RHSA-2018:2570 Released 2018-08-27 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux Client (v. 7) bind-32:9.9.4-61.el7_5.1, bind-libs-32:9.9.4-61.el7_5.1, bind-libs-lite-32:9.9.4-61.el7_5.1 +2
    • Red Hat Enterprise Linux Client Optional (v. 7) bind-32:9.9.4-61.el7_5.1, bind-chroot-32:9.9.4-61.el7_5.1, bind-devel-32:9.9.4-61.el7_5.1 +7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bind-32:9.9.4-61.el7_5.1, bind-libs-32:9.9.4-61.el7_5.1, bind-libs-lite-32:9.9.4-61.el7_5.1 +2
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) bind-32:9.9.4-61.el7_5.1, bind-chroot-32:9.9.4-61.el7_5.1, bind-devel-32:9.9.4-61.el7_5.1 +7
    • Red Hat Enterprise Linux Server (v. 7) bind-32:9.9.4-61.el7_5.1, bind-chroot-32:9.9.4-61.el7_5.1, bind-libs-32:9.9.4-61.el7_5.1 +8
    • Red Hat Enterprise Linux Server Optional (v. 7) bind-devel-32:9.9.4-61.el7_5.1, bind-devel-32:9.9.4-61.el7_5.1.ppc, bind-lite-devel-32:9.9.4-61.el7_5.1 +9
    • Red Hat Enterprise Linux Workstation (v. 7) bind-32:9.9.4-61.el7_5.1, bind-chroot-32:9.9.4-61.el7_5.1, bind-libs-32:9.9.4-61.el7_5.1 +6
    • Red Hat Enterprise Linux Workstation Optional (v. 7) bind-devel-32:9.9.4-61.el7_5.1, bind-lite-devel-32:9.9.4-61.el7_5.1, bind-pkcs11-devel-32:9.9.4-61.el7_5.1 +2
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) bind-32:9.9.4-61.el7_5.1, bind-chroot-32:9.9.4-61.el7_5.1, bind-libs-32:9.9.4-61.el7_5.1 +6
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) bind-devel-32:9.9.4-61.el7_5.1, bind-lite-devel-32:9.9.4-61.el7_5.1, bind-pkcs11-32:9.9.4-61.el7_5.1 +5
  • RHSA-2018:2571 Released 2018-08-27 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux Desktop (v. 6) bind-32:9.8.2-0.68.rc1.el6_10.1, bind-libs-32:9.8.2-0.68.rc1.el6_10.1, bind-utils-32:9.8.2-0.68.rc1.el6_10.1
    • Red Hat Enterprise Linux Desktop Optional (v. 6) bind-32:9.8.2-0.68.rc1.el6_10.1, bind-chroot-32:9.8.2-0.68.rc1.el6_10.1, bind-devel-32:9.8.2-0.68.rc1.el6_10.1 +1
    • Red Hat Enterprise Linux HPC Node (v. 6) bind-32:9.8.2-0.68.rc1.el6_10.1, bind-libs-32:9.8.2-0.68.rc1.el6_10.1, bind-utils-32:9.8.2-0.68.rc1.el6_10.1
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) bind-32:9.8.2-0.68.rc1.el6_10.1, bind-chroot-32:9.8.2-0.68.rc1.el6_10.1, bind-devel-32:9.8.2-0.68.rc1.el6_10.1 +1
    • Red Hat Enterprise Linux Server (v. 6) bind-32:9.8.2-0.68.rc1.el6_10.1, bind-chroot-32:9.8.2-0.68.rc1.el6_10.1, bind-libs-32:9.8.2-0.68.rc1.el6_10.1 +2
    • Red Hat Enterprise Linux Server Optional (v. 6) bind-devel-32:9.8.2-0.68.rc1.el6_10.1, bind-devel-32:9.8.2-0.68.rc1.el6_10.1.ppc, bind-sdb-32:9.8.2-0.68.rc1.el6_10.1
    • Red Hat Enterprise Linux Workstation (v. 6) bind-32:9.8.2-0.68.rc1.el6_10.1, bind-chroot-32:9.8.2-0.68.rc1.el6_10.1, bind-libs-32:9.8.2-0.68.rc1.el6_10.1 +1
    • Red Hat Enterprise Linux Workstation Optional (v. 6) bind-devel-32:9.8.2-0.68.rc1.el6_10.1, bind-sdb-32:9.8.2-0.68.rc1.el6_10.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    ISC BIND 9 — GLSA-201903-13

    3 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-04145 Some versions of BIND can improperly permit recursive query service to unauthorized clientsPriority MEDIUM 46
    • TI-2018-04148 Update policies krb5-subdomain and ms-subdomain do not enforce controls promised in their documentationPriority LOW 35
    Show all 3 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2018:2571
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2018:2571
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2018:2571
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2018:2571
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:2571
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2018:2571
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:2571
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2018:2571
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:2570
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:2570
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 8
  • Red Hat Virtualization 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-5740
  2. 2026-10-03 Alias added: GHSA-rqpc-6vjv-w22p

References

Advisory 12

  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
  • TI-2021-07476 A second vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack CVSS 3.1CRITICAL 9.8
  • TI-2023-27773 The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance… CVSS 3.1HIGH 7.5
  • TI-2020-06910 A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c CVSS 3.1HIGH 7.5
  • TI-2016-02320 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… CVSS 3.0HIGH 7.5
See all 192 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences