CVE-2022-35409
CVSS v3
9.1
CRITICAL
EPSS Score
1.7 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2022-07-15
Frequently asked questions
What is 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.
Is CVE-2022-35409 actively exploited?
Active exploitation of CVE-2022-35409 has not been confirmed. The EPSS score is 1.7%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2022-35409?
CVE-2022-35409 has a CVSS v3 base score of 9.1 (CRITICAL severity).
Is CVE-2022-35409 affecting your environment?
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