CVE-2024-23744
published 2024-01-21CVE-2024-23744: An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
PriorityP434high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.69%
49.2th percentile
An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | mbedtls | — | — |
| msrc | cbl2_hvloader_1.0.1-5_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| trustedfirmware | mbed_tls | <= 3.5.1 | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_debian7.5LOW
vendor_msrc7.5HIGH
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VulDB
mbed TLS 3.5.1 TLS 1.3 ClientHallo denial of service (Issue 8694 / EUVD-2024-21200)
vuldb·2026-06-06·CVSS 7.5
CVE-2024-23744 [HIGH] mbed TLS 3.5.1 TLS 1.3 ClientHallo denial of service (Issue 8694 / EUVD-2024-21200)
A vulnerability identified as problematic has been detected in mbed TLS 3.5.1. The impacted element is an unknown function of the component TLS 1.3 ClientHallo Handler. The manipulation leads to denial of service.
This vulnerability is uniquely identified as CVE-2024-23744. The attack is possible to be carried out remotely. No exploit exists.
GHSA
GHSA-627f-4vcr-fmq4: An issue was discovered in Mbed TLS 3
ghsa_unreviewed·2024-01-22
CVE-2024-23744 [HIGH] CWE-400 GHSA-627f-4vcr-fmq4: An issue was discovered in Mbed TLS 3
An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
OSV
CVE-2024-23744: An issue was discovered in Mbed TLS 3
osv·2024-01-21·CVSS 7.5
CVE-2024-23744 [HIGH] CVE-2024-23744: An issue was discovered in Mbed TLS 3
An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
Microsoft
An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
vendor_msrc·2024-01-09·CVSS 7.5
CVE-2024-23744 [HIGH] An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
mitre: mitre
Custom
Debian
CVE-2024-23744: mbedtls - An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial ...
vendor_debian·2024·CVSS 7.5
CVE-2024-23744 [HIGH] CVE-2024-23744: mbedtls - An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial ...
An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved
sid: resolved
trixie: resolved
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2024-01-21
Published