PT-2024-22603 · Mbed Tls · Mbed Tls

Alluettiv

+2

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Published

2024-04-02

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Updated

2025-06-27

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CVE-2024-28836

CVSS v3.1

5.4

Medium

VectorAV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Name of the Vulnerable Software and Affected Versions Mbed TLS versions 3.5.x through 3.5.x before 3.6.0 Mbed TLS versions prior to 3.6.0
Description An issue was discovered in Mbed TLS 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.
Recommendations For Mbed TLS versions 3.5.x before 3.6.0, update to version 3.6.0 or later to resolve the issue. For Mbed TLS versions prior to 3.6.0, update to version 3.6.0 or later to resolve the issue. As a temporary workaround, consider disabling the TLS 1.2 implementation to prevent a denial of service. Restrict access to the TLS 1.2 ClientHello to minimize the risk of exploitation.

Fix

DoS

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2024-28836

Affected Products

Mbed Tls