Vulnerability in Arm Mbed TLS
CVE-2020-16150
A Lucky 13 timing side channel in mbedtls_ssl_decrypt_buf in library/ssl_msg.c in Trusted Firmware Mbed TLS through 2.23.0 allows an attacker to recover secret key information. This affects CBC mode because of a computed time difference based on a padding length.
EPSS: 0.004 (29.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Arm Mbed_tls
- Debian Debian_linux — versions 10.0
- Fedoraproject Fedora — versions 31, 32, 33
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Vendor Advisory)
- cve@mitre.org (Vendor Advisory)
- cve@mitre.org (vendor-advisory, Mailing List, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Mailing List, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Mailing List, Third Party Advisory)
- cve@mitre.org (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-16150?
- CVE-2020-16150 is a medium-severity vulnerability in Arm Mbed TLS, classified under Observable Discrepancy. CVSS score: 5.5/10. Published 2020-09-02.
- How severe is CVE-2020-16150?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-16150 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.