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Servers and applications

CVE-2017-3733

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.

Severity
High 7.5
Published
4 May 2017
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 1.1.0
  • Version 1.1.0a
  • Version 1.1.0b
  • Version 1.1.0c
  • Version 1.1.0d

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-3733
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-3733