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: dnsutils, bind9-dnsutils, bind9-host, bind9, bind9-doc, bind9utils, bind9-dev, bind9-libs, bind9-utils
- USN-6642-1: dnsutils, bind9-dnsutils, bind9-host, bind9, bind9-doc, bind9utils, bind9-libs, bind9-utils
- USN-6665-1: python-unbound, unbound, libunbound8, libunbound-dev, unbound-anchor, python3-unbound, unbound-host
- USN-6723-1: dnsutils, bind9-host, libisccc-export140, liblwres160, libbind-export-dev, libisccc140, libisccfg90, libdns162, libirs-export141, libisccc-export160, libisccfg160, libbind9-140, libirs160, liblwres90, libisc-export160, libisccfg-export160, libisc-export169, libisccc90, libisc160, libisccfg140, libdns1100, libisc169, libbind9-160, libdns-export1100, bind9utils, libisc95, libisccc160, liblwres141, libbind9-90, libisccfg-export140, bind9, libbind-dev, bind9-doc, lwresd, libdns-export162, host, libirs141, libdns100, libirs-export160, libisccc-export140-udeb
- USN-6657-2: dnsmasq-base, dnsmasq, dnsmasq-utils, dnsmasq-base-lua
- USN-6034-1: dnsmasq-base, dnsmasq, dnsmasq-utils, dnsmasq-base-lua