Input validation error in ISC BIND - CVE-2023-2829
Published: June 21, 2023
Vulnerability identifier: #VU77611
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-2829
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. 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.
Affected software
ISC BIND
IBM Spectrum Conductor
IBM Spectrum Symphony
IBM Spectrum Conductor
IBM Spectrum Symphony
How to mitigate CVE-2023-2829
Install updates from vendor's website.
ISC BIND - addressed in versions 9.16.42-S1, 9.18.16-S1
IBM Spectrum Conductor - update to 2.5.1 FP2
IBM Spectrum Symphony - update to 7.3.2 Fix 601711
IBM Spectrum Conductor - update to 2.5.1 FP2
IBM Spectrum Symphony - update to 7.3.2 Fix 601711