USN-6657-1: Dnsmasq vulnerabilities
26 February 2024
Several security issues were fixed in Dnsmasq.
Releases
Packages
- dnsmasq - Small caching DNS proxy and DHCP/TFTP server
Details
Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered
that Dnsmasq icorrectly handled validating DNSSEC messages. A remote
attacker could possibly use this issue to cause Dnsmasq to consume
resources, leading to a denial of service. (CVE-2023-50387)
It was discovered that Dnsmasq incorrectly handled preparing an NSEC3
closest encloser proof. A remote attacker could possibly use this issue to
cause Dnsmasq to consume resources, leading to a denial of service.
(CVE-2023-50868)
It was discovered that Dnsmasq incorrectly set the maximum EDNS.0 UDP
packet size as required by DNS Flag Day 2020. This issue only affected
Ubuntu 23.10. (CVE-2023-28450)
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
This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to reboot your computer to
make all the necessary changes.
References
Related notices
- USN-6633-1: bind9-doc, bind9utils, bind9, bind9-libs, bind9-host, bind9-utils, bind9-dev, dnsutils, bind9-dnsutils
- USN-6642-1: bind9-doc, bind9utils, bind9, bind9-libs, bind9-host, bind9-utils, dnsutils, bind9-dnsutils
- USN-6665-1: unbound-host, libunbound-dev, python-unbound, python3-unbound, libunbound8, unbound, unbound-anchor
- USN-6723-1: bind9-doc, libbind-export-dev, libbind9-140, libdns-export162, libisccc-export160, libirs141, libbind9-90, liblwres90, libisccc140, bind9, host, libisccc160, libisccc-export140-udeb, libisccc-export140, libisccfg140, libisccc90, libisccfg-export140, libirs-export160, libisc-export169, libisccfg160, libisc169, libbind-dev, libbind9-160, libisccfg90, libisc160, libisc95, libdns-export1100, lwresd, liblwres160, liblwres141, libdns1100, bind9utils, libirs160, bind9-host, libisccfg-export160, dnsutils, libisc-export160, libdns100, libdns162, libirs-export141
- USN-6657-2: dnsmasq-utils, dnsmasq, dnsmasq-base-lua, dnsmasq-base
- USN-6034-1: dnsmasq-utils, dnsmasq, dnsmasq-base-lua, dnsmasq-base