==========================================================================
Ubuntu Security Notice USN-6657-2
April 24, 2024<\/p>\n
dnsmasq vulnerabilities
==========================================================================<\/p>\n
A security issue affects these releases of Ubuntu and its derivatives:<\/p>\n
– Ubuntu 18.04 LTS (Available with Ubuntu Pro)
– Ubuntu 16.04 LTS (Available with Ubuntu Pro)<\/p>\n
Summary:<\/p>\n
Several security issues were fixed in Dnsmasq.<\/p>\n
Software Description:
– dnsmasq: Small caching DNS proxy and DHCP\/TFTP server<\/p>\n
Details:<\/p>\n
USN-6657-1 fixed several vulnerabilities in Dnsmasq. This update provides
the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.<\/p>\n
Original advisory details:<\/p>\n
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)<\/p>\n
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)<\/p>\n
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)<\/p>\n
Update instructions:<\/p>\n
The problem can be corrected by updating your system to the following
package versions:<\/p>\n
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
dnsmasq-base 2.90-0ubuntu0.18.04.1+esm1<\/p>\n
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
dnsmasq-base 2.90-0ubuntu0.16.04.1+esm1<\/p>\n
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.<\/p>\n
References:
https:\/\/ubuntu.com\/security\/notices\/USN-6657-2
https:\/\/ubuntu.com\/security\/notices\/USN-6657-1
CVE-2023-28450, CVE-2023-50387, CVE-2023-50868<\/p>\n","protected":false},"excerpt":{"rendered":"
==========================================================================Ubuntu Security Notice USN-6657-2April 24, 2024 dnsmasq vulnerabilities========================================================================== A security issue affects these releases of Ubuntu and its derivatives: – Ubuntu 18.04 LTS (Available with Ubuntu Pro)– Ubuntu 16.04 LTS (Available with Ubuntu Pro) Summary: Several security issues were fixed in Dnsmasq. Software Description:– dnsmasq: Small caching DNS proxy and DHCP\/TFTP server Details: USN-6657-1 fixed …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-56465","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/56465","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=56465"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/56465\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=56465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=56465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=56465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}