UBUNTU-CVE-2022-35409

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UBUNTU-CVE-2022-35409

Summary:

Details: 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.

References: https://ubuntu.com/security/CVE-2022-35409, https://github.com/Mbed-TLS/mbedtls-docs/blob/5e9790353d2d9e41e85262eebe52fd90bb49f1e0/security-advisories/advisories/mbedtls-security-advisory-2022-07.md, https://github.com/Mbed-TLS/mbedtls/commit/f333dfab4a6c2d8a604a61558a8f783145161de4, https://github.com/Mbed-TLS/mbedtls/commit/e5af9fabf7d68e3807b6ea78792794b8352dbba2, https://github.com/Mbed-TLS/mbedtls/commit/862acb84033840b7e6376a4155ed5be2a6a4e117, https://github.com/Mbed-TLS/mbedtls/commit/a39170bbed1f5a69f108ea19fe3510c3643d53ab, https://github.com/Mbed-TLS/mbedtls/commit/33f41a8fa858128d5e9a1d1e1afbd4e63f24d444, https://github.com/Mbed-TLS/mbedtls/commit/4353d3d593cda3849a04c676288e0c790fa86a3c, https://github.com/Mbed-TLS/mbedtls/commit/3c036f54cc3a25e4d6b8003202b7e640522f4621, https://github.com/Mbed-TLS/mbedtls/commit/6b4f062cde84b9df57275676c428508ec6e41211, https://github.com/Mbed-TLS/mbedtls/commit/719c723afc63930d3472a12c0edb654a7d08d6b9, https://www.cve.org/CVERecord?id=CVE-2022-35409