USN-6665-1: Unbound vulnerabilities
28 February 2024
Several security issues were fixed in Unbound.
Releases
Packages
- unbound - validating, recursive, caching DNS resolver
Details
Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered
that Unbound incorrectly handled validating DNSSEC messages. A remote
attacker could possibly use this issue to cause Unbound to consume
resources, leading to a denial of service. (CVE-2023-50387)
It was discovered that Unbound incorrectly handled preparing an NSEC3
closest encloser proof. A remote attacker could possibly use this issue to
cause Unbound to consume resources, leading to a denial of service.
(CVE-2023-50868)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 23.10
Ubuntu 22.04
Ubuntu 20.04
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-6633-1: bind9-dev, bind9-libs, bind9-dnsutils, dnsutils, bind9, bind9-host, bind9-doc, bind9-utils, bind9utils
- USN-6642-1: bind9-libs, bind9-dnsutils, dnsutils, bind9, bind9-host, bind9-doc, bind9-utils, bind9utils
- USN-6657-1: dnsmasq, dnsmasq-utils, dnsmasq-base-lua, dnsmasq-base
- USN-6723-1: libbind9-140, libisccc-export140-udeb, libdns-export162, libbind9-160, libirs-export160, libdns-export1100, libdns100, libisc169, bind9-host, bind9-doc, liblwres160, bind9utils, host, libisc-export169, libirs141, liblwres141, libbind-dev, libisccfg-export160, libbind-export-dev, libisccc-export140, libisccc160, libdns162, libisc95, libdns1100, libisc160, libisccc140, dnsutils, libisccfg140, lwresd, libisccc-export160, libisc-export160, libisccfg160, libisccfg90, libbind9-90, libirs-export141, libisccfg-export140, liblwres90, bind9, libirs160, libisccc90
- USN-6657-2: dnsmasq, dnsmasq-utils, dnsmasq-base-lua, dnsmasq-base