CVE-2023-4236

HIGH EPSS 79.8%
Published Sep 20, 20232y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Sep 20, 2023 2y ago
Last Modified Jun 17, 2026 2w ago

Description

A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
79.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-617

Affected Products 18

VendorProductVersionRange
iscbind*≥9.18.0  –  <9.18.18
iscbind9.18.11any
iscbind9.18.18any
fedoraprojectfedora37any
fedoraprojectfedora38any
fedoraprojectfedora39any
debiandebian_linux10.0any
debiandebian_linux11.0any
netapph300s_firmware*any
netapph300s*any
netapph500s_firmware*any
netapph500s*any
netapph700s_firmware*any
netapph700s*any
netapph410s_firmware*any
netapph410s*any
netapph410c_firmware*any
netapph410c*any

References 7

  • openwall.com http://www.openwall.com/lists/oss-security/2023/09/20/2
    Mailing ListThird Party Advisory
  • kb.isc.org https://kb.isc.org/docs/cve-2023-4236
    Vendor Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/
    Mailing List
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/
    Mailing List
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/
    Mailing ListThird Party Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20231013-0004/
    Third Party Advisory
  • debian.org https://www.debian.org/security/2023/dsa-5504
    Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.