CVE-2022-35409
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.
| Software | From | Fixed in |
|---|---|---|
| arm / mbed_tls | 3.0.0 | 3.2.0 |
| arm / mbed_tls | - | 2.28.1 |
| debian / debian_linux | 10.0 | 10.0.x |
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