CVE-2017-3733

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20

Affected software

Vendor	Product	Versions
OpenSSL	OpenSSL	openssl-1.1.0; openssl-1.1.0a; openssl-1.1.0b; openssl-1.1.0c; openssl-1.1.0d

References

Timeline

Published: May 4, 2017
Last modified: Jun 17, 2026
NVD status: Modified

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