Description:
ISC has released a security update to fix a vulnerability in BIND. The details of the security update can be found at:
https://kb.isc.org/v1/docs/cve-2021-25219
Affected Systems:
- BIND 9.3.0 to 9.11.35
- BIND 9.12.0 to 9.16.21
- BIND 9.17.0 to 9.17.18
- BIND 9.9.3-S1 to 9.11.35-S1
- BIND 9.16.8-S1 to 9.16.21-S1
Impact:
Successful exploitation of the vulnerability could lead to denial of service on an affected system.
Recommendation:
Internet Systems Consortium (ISC) has released the following patches to solve the problems:
- BIND 9.11.36
- BIND 9.16.22
- BIND 9.17.19
- BIND 9.11.36-S1
- BIND 9.16.22-S1
The patches can be downloaded at the following URLs:
https://www.isc.org/download/
Administrators of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.
More Information:
- https://kb.isc.org/v1/docs/cve-2021-25219
- https://downloads.isc.org/isc/bind9/9.11.36/RELEASE-NOTES-bind-9.11.36.html
- https://downloads.isc.org/isc/bind9/9.16.22/doc/arm/html/notes.html
- https://downloads.isc.org/isc/bind9/9.17.19/doc/arm/html/notes.html
- https://www.hkcert.org/security-bulletin/isc-bind-denial-of-service-vulnerability_20211029
- https://us-cert.cisa.gov/ncas/current-activity/2021/10/28/isc-releases-security-advisory-bind
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25219
