CVE-2022-35409: arm mbed_tls Out-of-bounds Read

Vulnerability summary

CVE-2022-35409 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in arm mbed_tls. EPSS estimates a 2.30% chance of exploitation in the next 30 days, higher than 83% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 15-07-2022
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

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.

• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.