CVE-2022-35409

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Summary

CVECVE-2022-35409
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-07-15 14:15:09 UTC
Updated2026-06-05 19:38:32 UTC
DescriptionAn issue was discovered in Mbed TLS before 2.28.1 and 3.x before 3.2.0. In some configurations, an unauthenticated attacker can send an invalid ClientHello message to a DTLS server that causes a heap-based buffer over-read of up to 255 bytes. This can cause a server crash or possibly information disclosure based on error responses. Affected configurations have MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE enabled and MBEDTLS_SSL_IN_CONTENT_LEN less than a threshold that depends on the configuration: 258 bytes if using mbedtls_ssl_cookie_check, and possibly up to 571 bytes with a custom cookie check function.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

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

EPSS: 0.020490000 probability, percentile 0.842350000 (date 2026-06-11)

Problem Types: CWE-125 | n/a

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Arm Mbed Tls All All All All
Operating System Debian Debian Linux 10.0 All All All
Application Trustedfirmware Mbed Tls All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[SECURITY] [DLA 3249-1] mbedtls security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Releases · Mbed-TLS/mbedtls · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Release Notes
Buffer overread in DTLS ClientHello parsing — Mbed TLS documentation af854a3a-2127-422b-91ae-364da2661108 mbed-tls.readthedocs.io Exploit, Mitigation, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 181446 Debian Security Update for mbedtls (DLA 3249-1)
  • 184016 Debian Security Update for mbedtls (CVE-2022-35409)
  • 502428 Alpine Linux Security Update for mbedtls
  • 504157 Alpine Linux Security Update for mbedtls
  • 710702 Gentoo Linux Mbed Transport Layer Security (TLS) Multiple Vulnerabilities (GLSA 202301-08)
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