CVE-2023-50387
pdns-recursor - security update
7.5
HIGH
CVSS 3.1
EPSS 100.0%
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.
How to fix CVE-2023-50387
To remediate CVE-2023-50387, upgrade the affected package to a fixed version below.
- —upgrade to 9.16.48-r0 or later
- —upgrade to 2.90-r0 or later
- —upgrade to 1.19.1-r0 or later
Is CVE-2023-50387 being exploited?
Likely — EPSS is 100.0%, placing CVE-2023-50387 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (3)
- >= 9.0.0, < 9.16.48-r0
- from 0, < 2.90-r0
- from 0, < 1.19.1-r0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |