CVE-2023-2829: Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled
A named instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (synth-from-dnssec) enabled can be remotely terminated using a zone with a malformed NSEC record. This issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the vulnerability ID for this security issue?
The vulnerability ID for this security issue is CVE-2023-2829.
What is the severity rating of CVE-2023-2829?
The severity rating of CVE-2023-2829 is high (7.5).
Which software versions are affected by CVE-2023-2829?
BIND 9 versions 9.16.8-S1 through 9.16.41 and BIND 9 versions 9.18.11 through 9.18.15 are affected by CVE-2023-2829.
What is the impact of CVE-2023-2829?
A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.
How can CVE-2023-2829 be fixed?
Upgrade BIND to version 9.16.42 or 9.18.16 or apply the recommended patches provided by ISC.