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CVE-2024-23744

19
FAUCET Score

CVE-2024-23744 is a denial-of-service vulnerability affecting Mbed TLS version 3.5.1, specifically when a client sends a TLS 1.3 ClientHello without extensions. This issue can lead to persistent handshake denial. The vulnerability has a CVSS score of 7.5 (HIGH), indicating a high severity. It is a network-based attack with low attack complexity, requiring no privileges or user interaction, and its primary impact is high availability loss. Currently, there is no evidence of active exploitation, and no public exploit code is available on platforms like Metasploit or ExploitDB. Community discussion and media coverage for this CVE are minimal, which is typical for the vast majority of reported vulnerabilities.

Impacted Technologies

VendorProductVersion(s)CPE
> 3.4.0, <= 3.5.1CPE matchmatch criteria
cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.69%
Probability of exploitation in next 30 days
EPSS Percentile
48.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0069 is in the 25th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 19809-17086Fixed in: 1.0.1-6
microsoftpatch availablevia msrc
Product: 17238-17086Fixed in: 1.0.1-6
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 1.0.1-6
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 1.0.1-6
microsoftpatch availablevia msrc
Product: cbl2 hvloader 1.0.1-5 on CBL Mariner 2.0Fixed in: 1.0.1-6

Vendor Advisories (2)

microsoft2024-Nov/CVE-2024-23744

CVE-2024-23744

Nov 12, 2024
microsoft2024-Jan/CVE-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.

Jan 9, 2024

References

github.com / Mbed-TLS/mbedtls/issues/8694
ExploitIssue TrackingPatch