CVE-2020-25648

HIGH
7.5
CVSS Score
Published: October 20, 2020 at 12:00 AM UTC
Updated: June 17, 2026 at 03:07 AM UTC
6 products affected across 4 vendorsFedoraEnterprise LinuxJD Edwards EnterpriseOne Tools

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Severity
HIGH7.5
Exploit prediction
EPSS 4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.58
Affected range stops below 3.58, so it looks safe — our inference, not a vendor statement
v < 9.2.6.0
Affected range stops below 9.2.6.0, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770

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