CVE-2020-25648

nss: TLS 1.3 CCS flood remote DoS Attack

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se encontró un fallo en la manera en que NSS manejaba los mensajes CCS (ChangeCipherSpec) en TLS versión 1.3. Este fallo permite a un atacante remoto enviar múltiples mensajes CCS, causando una denegación de servicio para los servidores compilados con la biblioteca NSS. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema. Este fallo afecta a NSS versiones anteriores a 3.58

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-16 CVE Reserved
2020-10-20 CVE Published
2024-08-04 CVE Updated
2024-09-10 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (11)

URL	Tag	Source
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E	Mailing List
https://lists.debian.org/debian-lts-announce/2023/10/msg00039.html	Mailing List
https://www.oracle.com/security-alerts/cpuapr2022.html	Not Applicable

URL	Date	SRC

URL	Date	SRC
https://www.oracle.com//security-alerts/cpujul2021.html	2023-11-07
https://www.oracle.com/security-alerts/cpuoct2021.html	2023-11-07

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1887319	2021-09-21
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.58_release_notes	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ERA5SVJQXQMDGES7RIT4F4NQVLD35RXN	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HRM53IQCPZT2US3M7JXTP6I6IBA5RGOD	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RPOLN6DJUYQ3QBQEGLZGV73SNIPK7GHV	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-25648	2021-09-21

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"		Network Security Services Search vendor "Mozilla" for product "Network Security Services"				< 3.58 Search vendor "Mozilla" for product "Network Security Services" and version " < 3.58"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				31 Search vendor "Fedoraproject" for product "Fedora" and version "31"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Oracle Search vendor "Oracle"		Communications Offline Mediation Controller Search vendor "Oracle" for product "Communications Offline Mediation Controller"				12.0.0.3.0 Search vendor "Oracle" for product "Communications Offline Mediation Controller" and version "12.0.0.3.0"		-		Affected
Oracle Search vendor "Oracle"		Communications Pricing Design Center Search vendor "Oracle" for product "Communications Pricing Design Center"				12.0.0.3.0 Search vendor "Oracle" for product "Communications Pricing Design Center" and version "12.0.0.3.0"		-		Affected
Oracle Search vendor "Oracle"		Jd Edwards Enterpriseone Tools Search vendor "Oracle" for product "Jd Edwards Enterpriseone Tools"				< 9.2.6.0 Search vendor "Oracle" for product "Jd Edwards Enterpriseone Tools" and version " < 9.2.6.0"		-		Affected