Vulnerability in Arm Mbed TLS
CVE-2020-36424
An issue was discovered in Arm Mbed TLS before 2.24.0. An attacker can recover a private key (for RSA or static Diffie-Hellman) via a side-channel attack against generation of base blinding/unblinding values.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000
Affected products
- Arm Mbed TLS
- Debian Linux — versions 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-09… (Vendor Advisory)
- github.com/ARMmbed/mbedtls/releases/tag/v2.7.17 (Third Party Advisory, Release Notes)
- github.com/ARMmbed/mbedtls/releases/tag/v2.16.8 (Third Party Advisory, Release Notes)
- github.com/ARMmbed/mbedtls/releases/tag/v2.24.0 (Third Party Advisory, Release Notes)
- bugs.gentoo.org/740108 (Patch, Third Party Advisory, Issue Tracking)
- lists.debian.org/debian-lts-announce/2022/12/msg00036.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-36424?
- CVE-2020-36424 is a medium-severity vulnerability in Arm Mbed TLS, classified under Observable Discrepancy. CVSS score: 4.7/10. Published 2021-07-19.
- How severe is CVE-2020-36424?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2020-36424 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.