Home/CVE/A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker t
CVE

CVE-2020-25648

A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker t

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.

HIGH · CVSS 7.5 EPSS 0.00099
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-770Allocation of Resources Without Limits or Throttling
CWE-770Allocation of Resources Without Limits or Throttling
▤

Affected Products & Versions

6
mozilla network security services< 3.58
redhat enterprise linuxall versions
fedoraproject fedoraall versions
oracle communications offline mediation controllerall versions
oracle communications pricing design centerall versions
oracle jd edwards enterpriseone tools< 9.2.6.0
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD20 Oct 2020 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

9
suse-csafopenSUSE-SU-2024:11058-1
usnUSN-5410-1
suse-csafsuse-ru-2021_14818-1
suse-csafsuse-ru-2021_3115-2
suse-csafsuse-ru-2021_3115-1
🔗

References & Sources

10
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1887319Issue TrackingThird Party Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.58_release_notesRelease NotesVendor Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://lists.debian.org/debian-lts-announce/2023/10/msg00039.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ERA5SVJQXQMDGES7RIT4F4NQVLD35RXN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HRM53IQCPZT2US3M7JXTP6I6IBA5RGOD/
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