Debian: DSA-4752-1 Moderate: BIND9 DNS Denial Of Service Issues

debian

August 27, 2020

Several vulnerabilities were discovered in BIND, a DNS server implementation

Topics Covered

security advisory denial of service bind DNS server deb9

Summary

CVE-2020-8619

It was discovered that an asterisk character in an empty non-
terminal can cause an assertion failure, resulting in denial
of service.

CVE-2020-8622

Dave Feldman, Jeff Warren, and Joel Cunningham reported that a
truncated TSIG response can lead to an assertion failure, resulting
in denial of service.

CVE-2020-8623

Lyu Chiy reported that a flaw in the native PKCS#11 code can lead
to a remotely triggerable assertion failure, resulting in denial
of service.

CVE-2020-8624

Joop Boonen reported that update-policy rules of type "subdomain"
are enforced incorrectly, allowing updates to all parts of the zone
along with the intended subdomain.

For the stable distribution (buster), these problems have been fixed in
version 1:9.11.5.P4+dfsg-5.1+deb10u2.

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

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