Vulnerability Monitor

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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

2024-04-03T03:15:10.140

Last Modified

2025-06-10T00:41:15.783

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

Weaknesses

Type: Secondary
CWE-326

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	arm	mbed_tls	≤ 3.6.0	Yes

References

https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.6.0 Release Notes ([email protected])
https://github.com/hey3e Not Applicable ([email protected])
https://hey3e.github.io Not Applicable ([email protected])
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/ Vendor Advisory ([email protected])
https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.6.0 Release Notes (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/hey3e Not Applicable (af854a3a-2127-422b-91ae-364da2661108)
https://hey3e.github.io Not Applicable (af854a3a-2127-422b-91ae-364da2661108)
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)