Vulnerability in Arm Mbed TLS
CVE-2020-36476
An issue was discovered in Mbed TLS before 2.24.0 (and before 2.16.8 LTS and before 2.7.17 LTS). There is missing zeroization of plaintext buffers in mbedtls_ssl_read to erase unused application data from memory.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.016 (74.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.016 · change: +0.000
Affected products
- Arm Mbed TLS
- Debian Linux — versions 9.0, 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- 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)
- lists.debian.org/debian-lts-announce/2021/11/msg00021.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/12/msg00036.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-36476?
- CVE-2020-36476 is a high-severity vulnerability in Arm Mbed TLS, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 7.5/10. Published 2021-08-23.
- How severe is CVE-2020-36476?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-36476 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.