CVE-2023-50868
7.5
HIGH
CVSS 3.1
EPSS 81.7%
Description
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
How to fix CVE-2023-50868
To remediate CVE-2023-50868, 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-2023-50868 being exploited?
Likely — EPSS is 81.7%, placing CVE-2023-50868 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 |