Out-of-bounds Read in Arm Mbed TLS
CVE-2020-36426
An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
Vulnerability class: Buffer Overflow
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:N/A:H.
EPSS exploit prediction
EPSS: 0.017 (76.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Arm Mbed TLS
- Debian Linux — versions 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)
- bugs.gentoo.org/740108 (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-2020-36426?
- CVE-2020-36426 is a high-severity vulnerability in Arm Mbed TLS, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2021-07-19.
- How severe is CVE-2020-36426?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-36426 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.