Synology-SA-21:27 ISC BIND
Publish Time: 2021-11-01 18:33:53 UTC+8
Last Updated: 2021-11-01 18:33:53 UTC+8
A vulnerability allows remote attackers to conduct denial-of-service attacks via a susceptible version of Synology DNS Server.
|Product||Severity||Fixed Release Availability|
If you need immediate assistance, please contact Synology technical support via https://account.synology.com/support.
- Severity: Moderate
- CVSS3 Base Score: 5.3
- CVSS3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.
- ISC Releases Security Advisory for BIND
- CVE-2021-25219: Lame cache can be abused to severely degrade resolver performance
|1||2021-11-01||Initial public release.|