CVE-2020-12403

2020-08-1800:00:00

ubuntu.com

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

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

6.4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:N/A:P

0.002 Low

EPSS

Percentile

61.5%

JSON

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.

Bugs

<https://bugzilla.mozilla.org/show_bug.cgi?id=1636771 (private)>

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchnss< 2:3.35-2ubuntu2.12UNKNOWN
ubuntu20.04noarchnss< 2:3.49.1-1ubuntu1.5UNKNOWN
ubuntu14.04noarchnss< 2:3.28.4-0ubuntu0.14.04.5+esm8) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchnss< 2:3.28.4-0ubuntu0.16.04.14UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	nss	< 2:3.35-2ubuntu2.12	UNKNOWN
ubuntu	20.04	noarch	nss	< 2:3.49.1-1ubuntu1.5	UNKNOWN
ubuntu	14.04	noarch	nss	< 2:3.28.4-0ubuntu0.14.04.5+esm8) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	nss	< 2:3.28.4-0ubuntu0.16.04.14	UNKNOWN