CVE-2020-36423 json
An issue was discovered in Arm Mbed TLS before 2.23.0
published 2021-07-19 5 y ago modified 2026-07-18 3 mo ago also EUVD-2020-23951 , JLSEC-2025-206
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
An issue was discovered in Arm Mbed TLS before 2.23.0. A remote attacker can recover plaintext because a certain Lucky 13 countermeasure doesn't properly consider the case of a hardware accelerator.
Patch / fix
- julia MbedTLS_jll 2.16.8+0
- arm mbed_tls 2.16.7, 2.23.0
- mbedtls Debian 14, Debian 13, Debian 12 2.16.9-0.1
debian advisories DEBIAN-CVE-2020-36423
Exploit prediction
1.20% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| julia | MbedTLS_jll | <2.16.8+0 |
2.16.8+0 |
Classification
- Weakness
-
- CWE-319 Cleartext Transmission of Sensitive Information
References
-
bugs.gentoo.org
/730752
issue-tracking, patch, third-party-advisory, web
-
github.com
/ARMmbed/mbedtls/releases/tag/v2.16.7
release-notes, third-party-advisory, web
-
github.com
/ARMmbed/mbedtls/releases/tag/v2.23.0
release-notes, third-party-advisory, web
-
lists.debian.org
/debian-lts-announce/2022/12/msg00036.html
mailing-list, third-party-advisory, web
Sources
- CVE List CVE-2020-36423
- NVD CVE-2020-36423
- OSV JLSEC-2025-206
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