PT-2020-13102 · Mozilla+7 · Nss+7

Published 2020-07-27 · Updated 2024-06-15 · CVE-2020-12403

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions NSS versions prior to 3.55

Description A flaw was found in the implementation of CHACHA20-POLY1305 in NSS. This issue could cause out-of-bounds reads when using multi-part Chacha20, affecting confidentiality and system availability.

Recommendations For versions prior to 3.55, the issue was fixed by explicitly disabling multi-part ChaCha20 and strictly enforcing tag length. As a temporary workaround, consider disabling the use of multi-part ChaCha20 until a patch is available.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALT-PU-2020-2482

ALT-PU-2020-2932

ALT-PU-2021-1367

AZL-6746

CESA-2020_4076

CESA-2021_0538

CVE-2020-12403

DLA-2388-1

DLA-3327-1

MGASA-2020-0318

OESA-2021-1115

OESA-2021-1116

OPENSUSE-SU-2024:11058-1

RHSA-2020:4076

RHSA-2020_4076

RHSA-2021:0538

RHSA-2021:0758

RHSA-2021:0876

RHSA-2021:1026

RHSA-2021_0538

RLSA-2021:0538

SUSE-RU-2021:14818-1

SUSE-RU-2021:3115-1

SUSE-RU-2021:3115-2

SUSE-RU-2021:3116-1

USN-4476-1

Affected Products

Alt Linux

Astra Linux

Centos

Linuxmint

Nss

Red Hat

Rocky Linux

Ubuntu

References · 73

• https://errata.rockylinux.org/RLSA-2021:0538 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1116 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4455-1 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2020-31 · Vendor Advisory
• https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-12403 · Security Note
• https://osv.dev/vulnerability/SUSE-RU-2021:14818-1 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1868931 · Patch
• https://osv.dev/vulnerability/SUSE-RU-2021:3115-1 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-6746 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-12403 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11058-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1115 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2020-0318 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2020-0318.html · Security Note