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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…
Medium5.5EPSS 0.38%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
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.
Timeline
ID reserved
By mitre
- 34 days later
· 34 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.38% · top 67% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
n/a
- affected n/a
References (6)
- https://tls.mbed.org/tech-updates/security-advisories (opens in a new tab)x_transferred
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-09-1 (opens in a new tab)x_transferred
- FEDORA-2020-48a1ae610c (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2020-8b0d59bac6 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2020-e75ade5e38 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20221225 [SECURITY] [DLA 3249-1] mbedtls security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-16150)Record last updated .