Vulnerability in Trustedfirmware Mbed TLS
CVE-2024-28836
An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When negotiating the TLS version on the server side, it can fall back to the TLS 1.2 implementation of the protocol if it is disabled. If the TLS 1.2 implementation was disabled at build time, a TLS 1.2 client could put a TLS 1.3-only server into an infinite loop processing a TLS 1.2 ClientHello, resulting in a denial of service. If the TLS 1.2 implementation was disabled at runtime, a TLS 1.2 client can successfully establish a TLS 1.2 connection with the server.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/ (Vendor Advisory)
- github.com/Mbed-TLS/mbedtls/releases/tag/v3.6.0 (Release Notes)
Frequently asked questions
- What is CVE-2024-28836?
- CVE-2024-28836 is a medium-severity vulnerability in Trustedfirmware Mbed TLS, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.4/10. Published 2024-04-03.
- How severe is CVE-2024-28836?
- Medium severity. CVSS v3 base score is 5.4 out of 10.