CVE-2022-35409 Memory corruption in n/a
An unauthenticated attacker can cause a server crash or information disclosure via a heap-based buffer over-read in Mbed TLS DTLS servers with specific configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-35409?
CVE-2022-35409 is a critical memory corruption vulnerability in Arm Mbed Tls, published on 15 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An 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.
Weakness: CWE-125
Which versions are affected by CVE-2022-35409?
It affects 3 products.
Linux distribution packages (1)
mbedtls-2 openSUSE:Tumbleweed | All versions | 2.28.1-1.1 |
Products include Arm Mbed Tls, Debian Debian Linux, Trustedfirmware Mbed Tls.
How do I fix CVE-2022-35409?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-35409 being exploited?
There is no known exploitation of CVE-2022-35409 in the wild and no public exploit code.
Other vulnerabilities in Arm Mbed Tls
Sources
Also known as ALPINE-CVE-2022-35409, DEBIAN-CVE-2022-35409, GHSA-m52q-qpp4-f753, JLSEC-2025-218, MGASA-2022-0415, UBUNTU-CVE-2022-35409 and 1 more.