CVE-2024-28755

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Summary

CVECVE-2024-28755
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-04-03 03:15:10 UTC
Updated2026-06-05 19:38:32 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from ADP

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

EPSS: 0.001270000 probability, percentile 0.316310000 (date 2026-06-11)

Problem Types: CWE-326 | n/a | CWE-326 CWE-326 Inadequate Encryption Strength

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Trustedfirmware Mbed Tls All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified
ADP Mbed Mbedtls affected 3.6.0 custom Not specified

References

ReferenceSourceLinkTags
屋妙妙奇米 af854a3a-2127-422b-91ae-364da2661108 hey3e.github.io Not Applicable
hey3e (gam1n) · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Not Applicable
mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories af854a3a-2127-422b-91ae-364da2661108 mbed-tls.readthedocs.io Vendor Advisory
github.com/Mbed-TLS/mbedtls/releases/tag/v3.6.0 af854a3a-2127-422b-91ae-364da2661108 github.com Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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