CVE-2023-50868
HIGHCVSS v3
7.5
HIGH
EPSS Score
12.1%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical Details
- Published
- 2/14/2024
Frequently Asked Questions
What is CVE-2023-50868?
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.
Is CVE-2023-50868 actively exploited?
Active exploitation of CVE-2023-50868 has not been confirmed. The EPSS score is 12.1%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-50868?
CVE-2023-50868 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2023-50868 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.