Rapid7 Vulnerability & Exploit Database

Oracle Linux: CVE-2023-50868: ELSA-2024-3271: bind and dhcp security update (IMPORTANT) (Multiple Advisories)

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

Oracle Linux: CVE-2023-50868: ELSA-2024-3271: bind and dhcp security update (IMPORTANT) (Multiple Advisories)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
02/13/2024
Created
03/01/2024
Added
02/28/2024
Modified
07/22/2024

Description

The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations. A flaw was found in bind9. By flooding a DNSSEC resolver with responses coming from a DNSEC-signed zone using NSEC3, an attacker can lead the targeted resolver to a CPU exhaustion, further leading to a Denial of Service on the targeted host. This vulnerability applies only for systems where DNSSEC validation is enabled.

Solution(s)

  • oracle-linux-upgrade-bind
  • oracle-linux-upgrade-bind9-16
  • oracle-linux-upgrade-bind9-16-chroot
  • oracle-linux-upgrade-bind9-16-devel
  • oracle-linux-upgrade-bind9-16-dnssec-utils
  • oracle-linux-upgrade-bind9-16-doc
  • oracle-linux-upgrade-bind9-16-libs
  • oracle-linux-upgrade-bind9-16-license
  • oracle-linux-upgrade-bind9-16-utils
  • oracle-linux-upgrade-bind-chroot
  • oracle-linux-upgrade-bind-devel
  • oracle-linux-upgrade-bind-dnssec-doc
  • oracle-linux-upgrade-bind-dnssec-utils
  • oracle-linux-upgrade-bind-doc
  • oracle-linux-upgrade-bind-dyndb-ldap
  • oracle-linux-upgrade-bind-export-devel
  • oracle-linux-upgrade-bind-export-libs
  • oracle-linux-upgrade-bind-libs
  • oracle-linux-upgrade-bind-libs-lite
  • oracle-linux-upgrade-bind-license
  • oracle-linux-upgrade-bind-lite-devel
  • oracle-linux-upgrade-bind-pkcs11
  • oracle-linux-upgrade-bind-pkcs11-devel
  • oracle-linux-upgrade-bind-pkcs11-libs
  • oracle-linux-upgrade-bind-pkcs11-utils
  • oracle-linux-upgrade-bind-sdb
  • oracle-linux-upgrade-bind-sdb-chroot
  • oracle-linux-upgrade-bind-utils
  • oracle-linux-upgrade-dhclient
  • oracle-linux-upgrade-dhcp
  • oracle-linux-upgrade-dhcp-client
  • oracle-linux-upgrade-dhcp-common
  • oracle-linux-upgrade-dhcp-devel
  • oracle-linux-upgrade-dhcp-libs
  • oracle-linux-upgrade-dhcp-relay
  • oracle-linux-upgrade-dhcp-server
  • oracle-linux-upgrade-dnsmasq
  • oracle-linux-upgrade-dnsmasq-utils
  • oracle-linux-upgrade-kernel-uek-container
  • oracle-linux-upgrade-python36-debug
  • oracle-linux-upgrade-python3-bind
  • oracle-linux-upgrade-python3-bind9-16
  • oracle-linux-upgrade-python3-unbound
  • oracle-linux-upgrade-rust-debugger-common
  • oracle-linux-upgrade-unbound
  • oracle-linux-upgrade-unbound-devel
  • oracle-linux-upgrade-unbound-libs

References

View more

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;