Debian Security Advisory

DSA-5504-1 bind9 -- security update

Date Reported:
22 Sep 2023
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 1052416, Bug 1052417.
In Mitre's CVE dictionary: CVE-2023-3341, CVE-2023-4236.
More information:

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

  • CVE-2023-3341

    A stack exhaustion flaw was discovered in the control channel code which may result in denial of service (named daemon crash).

  • CVE-2023-4236

    Robert Story discovered that a flaw in the networking code handling DNS-over-TLS queries could cause named to terminate unexpectedly due to an assertion failure, resulting in denial of service when under high DNS-over-TLS query load conditions.

For the oldstable distribution (bullseye), these problems have been fixed in version 1:9.16.44-1~deb11u1. The oldstable distribution (bullseye) is only affected by CVE-2023-3341.

For the stable distribution (bookworm), these problems have been fixed in version 1:9.18.19-1~deb12u1.

We recommend that you upgrade your bind9 packages.

For the detailed security status of bind9 please refer to its security tracker page at: