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Debian DSA-4994-1: Critical Bind9 Denial Of Service Risk

debian
Calendar Grey October 28, 2021
Debian Logo
Ubuntu Security Notice USN-4938-1 tackles a severe DNS vulnerability leading to performance declines and potential DoS attacks.
Kishore Kumar Kothapalli discovered that the lame server cache in BIND, a DNS server implementation, can be abused by an attacker to significantly degrade resolver performance, res...
Topics%20covered

Topics Covered

security advisory denial of service critical debian bind9 dns performance issue

Summary

For the oldstable distribution (buster), this problem has been fixed
in version 1:9.11.5.P4+dfsg-5.1+deb10u6.

For the stable distribution (bullseye), this problem has been fixed in
version 1:9.16.22-1~deb11u1.

We recommend that you upgrade your bind9 packages.

For the detailed security status of bind9 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/source-package/bind9

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/



Severity
critical
Lowest
Low
Medium
High
Critical

Package: bind9
CVE ID: CVE-2021-25219

Topics%20covered

Topics Covered

security advisory denial of service critical debian bind9 dns performance issue

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