CVE-2020-25648

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

VendorProductVersions
n/anssnss versions before 3.58

References

Timeline

Published
Oct 20, 2020
Last modified
Jun 17, 2026
NVD status
Modified

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