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: dnsutils, bind9-dev, bind9-host, bind9-libs, bind9utils, bind9-dnsutils, bind9-utils, bind9-doc, bind9
- USN-6642-1: dnsutils, bind9-host, bind9-libs, bind9utils, bind9-dnsutils, bind9-utils, bind9-doc, bind9
- USN-6657-1: dnsmasq-base-lua, dnsmasq, dnsmasq-base, dnsmasq-utils
- USN-6723-1: libisccfg90, libirs160, libdns1100, libbind9-140, libbind-export-dev, bind9-doc, libisccc160, libisccc140, dnsutils, libirs-export160, libisccc-export140-udeb, libdns-export1100, libisc-export169, libbind9-160, libbind9-90, libirs-export141, libisc95, libdns100, liblwres90, bind9, libdns-export162, libbind-dev, libisccc-export140, liblwres160, libdns162, libisc160, bind9utils, host, libisccc-export160, libisccfg-export160, liblwres141, libisc169, libirs141, libisccfg140, bind9-host, libisc-export160, lwresd, libisccc90, libisccfg-export140, libisccfg160
- USN-6657-2: dnsmasq-base-lua, dnsmasq, dnsmasq-base, dnsmasq-utils