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Ubuntu: (Multiple Advisories) (CVE-2023-50387): Bind vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2023-50387): Bind vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/13/2024
Created
02/14/2024
Added
02/14/2024
Modified
04/25/2024

Description

Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.

Solution(s)

  • ubuntu-upgrade-bind9
  • ubuntu-upgrade-dnsmasq-base
  • ubuntu-upgrade-libunbound8
  • ubuntu-upgrade-unbound

References

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