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01 Record

CVE-2023-5517

Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled

HighPUBLISHEDCNA: isc
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
View raw JSON

02 Description

Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
1.27% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 69.8% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-02-13 14:04Z2 YR AGO
Last updated
2025-02-13 17:25Z1 YR AGO
Reserved
2023-10-11
Assigning CNA
isc
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
Data version
5.1
Document digest
248f949189d1924f3a2c75836bb70c90743e9e817cdf488cab974c7f7963942f

05 Affected products

VendorProductVersionsPlatforms
ISCBIND 99.12.0 to 9.16.45, 9.18.0 to 9.18.21, 9.19.0 to 9.19.19, 9.16.8-S1 to 9.16.45-S1, 9.18.11-S1 to 9.18.21-S1—
iscbind_99.12.0 to 9.16.45, 9.18.0 to 9.18.21, 9.19.0 to 9.19.19, 9.16.8-S1 to 9.16.45-S1, 9.18.11-S1 to 9.18.21-S1—

06 References

07 Remediation

Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.48, 9.18.24, 9.19.21, 9.16.48-S1, or 9.18.24-S1.

08 Fixed in

AlmaLinux 8

  • bind9.16
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-chroot
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-devel
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-dnssec-utils
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-doc
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-libs
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-license
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-utils
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • python3-bind9.16
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • bind
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-chroot
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-dnssec-doc
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-dnssec-utils
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-doc
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-dyndb-ldap
    Fixed

    A version is affected if any line below covers it.

    • Affected before 11.9-8.el9_3.3.alma.1
    • Affected before 11.9-9.el9_4.alma.1
  • bind-libs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-license
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-utils
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • python3-bind
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • bind9.16
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-chroot
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-devel
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-dnssec-utils
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-doc
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-libs
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-license
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • bind9.16-utils
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1
  • python3-bind9.16
    Fixed in 32:9.16.23-0.16.el8_9.2.alma.1

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • bind
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-chroot
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-dnssec-doc
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-dnssec-utils
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-doc
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-dyndb-ldap
    Fixed

    A version is affected if any line below covers it.

    • Affected before 11.9-8.el9_3.3.alma.1
    • Affected before 11.9-9.el9_4.alma.1
  • bind-libs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-license
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • bind-utils
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1
  • python3-bind
    Fixed

    A version is affected if any line below covers it.

    • Affected before 32:9.16.23-14.el9_3.4
    • Affected before 32:9.16.23-18.el9_4.1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • bind9
    Fixed in 1:9.18.24-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • bind9
    Fixed in 1:9.19.21-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • bind9
    Fixed in 1:9.19.21-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • bind9
    Fixed in 1:9.16.48-0ubuntu0.20.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • bind9
    Fixed in 1:9.18.18-0ubuntu0.22.04.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.