Reachable Assertion in ISC BIND - CVE-2022-0635
Published: March 17, 2022
Vulnerability identifier: #VU61424
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-2022-0635
CWE-ID: CWE-617
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 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.
Affected software
ISC BIND
Arch Linux
Slackware Linux
Arch Linux
Slackware Linux
How to mitigate CVE-2022-0635
Install updates from vendor's website.
ISC BIND - update to 9.18.1