The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1544.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff




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Red Hat Security Advisory

Synopsis:           Important: dnsmasq security and bug fix update
Advisory ID:        RHSA-2024:1544-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:1544
Issue date:         2024-03-27
Revision:           03
CVE Names:          CVE-2023-28450
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Summary: 

An update for dnsmasq is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.




Description:

The dnsmasq packages contain dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.

Security Fixes:

* dnsmasq: default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 (CVE-2023-28450)

* dnsmasq: bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator (CVE-2023-50387)

* dnsmasq: bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources (CVE-2023-50868)

Bug Fix:

* Segmentation fault occurs in dnsmasq-2.79-26 in RHEL8

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.


Solution:

https://access.redhat.com/articles/11258



CVEs:

CVE-2023-28450

References:

https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2178948
https://bugzilla.redhat.com/show_bug.cgi?id=2263914
https://bugzilla.redhat.com/show_bug.cgi?id=2263917