Vulnerability in Trustedfirmware Mbed TLS
CVE-2024-28755
An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When an SSL context was reset with the mbedtls_ssl_session_reset() API, the maximum TLS version to be negotiated was not restored to the configured one. An attacker was able to prevent an Mbed TLS server from establishing any TLS 1.3 connection, potentially resulting in a Denial of Service or forced version downgrade from TLS 1.3 to TLS 1.2.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (32.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% 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)
- hey3e.github.io (Not Applicable)
- github.com/hey3e (Not Applicable)
- github.com/Mbed-TLS/mbedtls/releases/tag/v3.6.0 (Release Notes)
Frequently asked questions
- What is CVE-2024-28755?
- CVE-2024-28755 is a medium-severity vulnerability in Trustedfirmware Mbed TLS, classified under Inadequate Encryption Strength. CVSS score: 6.5/10. Published 2024-04-03.
- How severe is CVE-2024-28755?
- Medium severity. CVSS v3 base score is 6.5 out of 10.