CVE-2023-50387
Public on 2024-02-14
Modified on 2024-04-02
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
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | bind | Pending Fix | ||
| Amazon Linux 2 - Core | bind | 2024-04-24 | ALAS2-2024-2530 | Fixed |
| Amazon Linux 2023 | bind | 2024-02-29 | ALAS2023-2024-550 | Fixed |
| Amazon Linux 1 | dnsmasq | Not Affected | ||
| Amazon Linux 2 - Dnsmasq2.85 Extra | dnsmasq | Pending Fix | ||
| Amazon Linux 2 - Core | dnsmasq | Not Affected | ||
| Amazon Linux 2 - Dnsmasq Extra | dnsmasq | 2024-04-10 | ALAS2DNSMASQ-2024-002 | Fixed |
| Amazon Linux 2023 | dnsmasq | 2024-02-29 | ALAS2023-2024-552 | Fixed |
| Amazon Linux 1 | unbound | Pending Fix | ||
| Amazon Linux 2 - Unbound1.13 Extra | unbound | Pending Fix | ||
| Amazon Linux 2 - Unbound1.17 Extra | unbound | Pending Fix | ||
| Amazon Linux 2 - Core | unbound | 2024-02-29 | ALAS2-2024-2481 | Fixed |
| Amazon Linux 2023 | unbound | 2024-02-29 | ALAS2023-2024-553 | Fixed |
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 |