CVE-2017-3733

Name: CVE-2017-3733
Creator: NVD / NIST
Published: 2017-05-04T19:29:00.43+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 12.64%

Last modified Jun 17, 2026

CVE-2017-3733 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 12.64% chance of exploitation in the next 30 days.

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

EPSS Probability

12.64%

95.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Openssl	Openssl	1.1.0
Openssl	Openssl	1.1.0a
Openssl	Openssl	1.1.0b
Openssl	Openssl	1.1.0c
Openssl	Openssl	1.1.0d
Hp	Operations Agent	11.14
Hp	Operations Agent	11.15

References

Timeline

Published: May 4, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-3733?

How severe is CVE-2017-3733?

Severity scoring for CVE-2017-3733 is pending analysis. The EPSS model estimates a 12.64% probability of exploitation in the next 30 days.

How do I fix CVE-2017-3733?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-3733?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST