CVE-2020-12403

nss: CHACHA20-POLY1305 decryption with undersized tag leads to out-of-bounds read

Severity Score

9.1

*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 CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest threat from this vulnerability is to confidentiality and system availability.

Se encontró un fallo en la manera en que se implementó CHACHA20-POLY1305 en NSS en versiones anteriores a 3.55. Cuando es usado Chacha20 de múltiples partes, podría causar lecturas fuera de límites. Este problema fue corregido al desactivar explícitamente ChaCha20 de múltiples partes (que no funcionaba correctamente) y aplicando estrictamente la longitud de la etiqueta. La mayor amenaza de esta vulnerabilidad es la confidencialidad y la disponibilidad del sistema

A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest threat from this vulnerability is to confidentiality and system availability.

Red Hat OpenShift Do is a simple CLI tool for developers to create, build, and deploy applications on OpenShift. The odo tool is completely client-based and requires no server within the OpenShift cluster for deployment. It detects changes to local code and deploys it to the cluster automatically, giving instant feedback to validate changes in real-time. It supports multiple programming languages and frameworks. Red Hat OpenShift Do openshift/odo-init-image 1.1.3 is a container image that is used as part of the InitContainer setup that provisions odo components.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-04-28 CVE Reserved
2020-08-19 CVE Published
2024-08-04 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (5)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html	Mailing List
https://security.netapp.com/advisory/ntap-20230324-0006

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1868931	2021-03-30

URL	Date	SRC
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes	2023-03-24
https://access.redhat.com/security/cve/CVE-2020-12403	2021-03-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"		Nss Search vendor "Mozilla" for product "Nss"				< 3.55 Search vendor "Mozilla" for product "Nss" and version " < 3.55"		-		Affected