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CVE-2023-50387

Public on 2024-02-14
Modified on 2024-02-14
Description

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

Severity
Important
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CVSS v3 Base Score
7.5
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Dnsmasq Extra dnsmasq 2024-04-10 22:27 ALAS2DNSMASQ-2024-002
Amazon Linux 2 - Core bind 2024-04-24 22:15 ALAS2-2024-2530
Amazon Linux 2023 bind 2024-02-29 10:29 ALAS2023-2024-550
Amazon Linux 2023 dnsmasq 2024-02-29 10:29 ALAS2023-2024-552
Amazon Linux 2 - Core unbound 2024-02-29 10:03 ALAS2-2024-2481
Amazon Linux 2023 unbound 2024-02-29 10:29 ALAS2023-2024-553

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv3 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H