VULNERABILITY INTELLIGENCE

CVE-2020-25648

CVSS score7.5 HIGH
EPSS probability3.50%
CISA KEVNot currently listed
Published2020-10-20
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.

Weakness classification

  • CWE-770: Allocation of Resources Without Limits or Throttling

Primary references