PT-2021-6717 · Arm+2 · Mbed Tls+2

Hyesoon Kim + 6 · Published 2020-07-02 · Updated 2023-01-11 · CVE-2020-36423

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Arm Mbed TLS versions prior to 2.23.0

Description A remote attacker can recover plaintext because a certain Lucky 13 countermeasure doesn't properly consider the case of a hardware accelerator. This issue is related to the implementation of TLS and SSL protocols in Mbed TLS, allowing an attacker to access confidential data.

Recommendations For versions prior to 2.23.0, update to version 2.23.0 or later to resolve the issue. As a temporary workaround, consider disabling hardware acceleration for TLS and SSL protocols until a patch is available. Restrict access to sensitive data to minimize the risk of exploitation.

Fix

Cleartext Transmission of Sensitive Information

Weakness Enumeration

CWE-319

Related Identifiers

ALT-PU-2020-2262

ALT-PU-2020-2355

BDU:2022-02080

CVE-2020-36423

DLA-3249-1

Affected Products

Alt Linux

Astra Linux

Mbed Tls

References · 16

• https://cve.org/CVERecord?id=CVE-2020-36423 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-36423 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-36423 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-36423 · Security Note
• https://ubuntu.com/security/CVE-2020-36423 · Vendor Advisory
• https://bugs.gentoo.org/730752 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-36423 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-02080 · Security Note
• https://osv.dev/vulnerability/CVE-2020-36423 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3249-1 · Vendor Advisory
• https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7 · Note
• https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0 · Note
• https://github.com/ARMmbed/mbedtls/issues/3246 · Note
• https://t.me/cibsecurity/26257 · Telegram Post
• https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html · Note