Is CVE-2020-25648 in the CISA KEV catalog?

No. CVE-2020-25648 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-25648?

CVE-2020-25648 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-25648?

CVE-2020-25648 has an EPSS score of 3.85% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-25648?

Upgrade nss on debian 11 to 2:3.58-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-25648

HIGHEPSS 89th pctl

7.5

CVSS v3

NVD

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.

CWE-770Allocation of Resources Without Limits or Throttling

How to fix

Remediation Available

nssDebian

Fixed in:2:3.58-1CVE-2020-25648

libnss3Ubuntu

Fixed in:2:3.35-2ubuntu2.14USN-5410-1

Fixed in:2:3.49.1-1ubuntu1.7USN-5410-1

nssUbuntu

Fixed in:2:3.35-2ubuntu2.14USN-5410-1

Fixed in:2:3.49.1-1ubuntu1.7USN-5410-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

3.85%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Patch2

Vendor Advisory1

developer.mozilla.org

Third-Party Advisory2

Other references5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.