Red Hat Security Advisory: bind and dhcp security update

Fixed packages 50

Vulnerabilities 3

• High 7.5
  CVE-2023-4408

  Parsing large DNS messages may cause excessive CPU load

  The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by ex…

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi
  Feb 13, 2024
• High 7.5
  CVE-2023-50387 Public exploit EPSS 100%

  Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to …

  bind9 bind9 bind unbound Debian Ubuntu Azure Linux Alpine Wolfi
  Feb 14, 2024
• High 7.5
  CVE-2023-50868 Public exploit EPSS 74%

  The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote att…

  bind9 bind9 bind unbound Debian Ubuntu Azure Linux Alpine Wolfi
  Feb 14, 2024

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2263896
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2263914
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2263917
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_2721.json
• report
  https://access.redhat.com/security/cve/CVE-2023-4408
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-4408
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-4408
• article
  https://kb.isc.org/docs/cve-2023-4408
• report
  https://access.redhat.com/security/cve/CVE-2023-50387
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-50387
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-50387
• article
  https://blog.powerdns.com/2024/02/13/powerdns-recursor-4-8-6-4-9-3-5-0-2-released
• article
  https://kb.isc.org/docs/cve-2023-50387
• article
  https://www.knot-resolver.cz/2024-02-13-knot-resolver-5.7.1.html
• report
  https://access.redhat.com/security/cve/CVE-2023-50868
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-50868
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-50868
• article
  https://kb.isc.org/docs/cve-2023-50868