Debian Security Advisory

DSA-4752-1 bind9 -- security update

Date Reported:
27 Aug 2020
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 966497.
In Mitre's CVE dictionary: CVE-2020-8619, CVE-2020-8622, CVE-2020-8623, CVE-2020-8624.
More information:

Several vulnerabilities were discovered in BIND, a DNS server implementation.

  • 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: