Reachable Assertion in ISC BIND - CVE-2022-0635
Published: March 17, 2022
Vulnerability identifier: #VU61424
CSH Severity: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2022-0635
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
ISC BIND
ISC BIND
Software vendor:
ISC
ISC
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion when processing DNS requests. A remote attacker can send a repeated patterns of specific queries to servers with DNSSEC-Validated Cache feature (synth-from-dnssec) enabled and cause an INSIST failure in query.c:query_dname which causes named to terminate unexpectedly.
Remediation
Install updates from vendor's website.