The OpenSSL Project fixed a High Severity flaw CVE-2017-3733 in release 1.1.0

On Thursday the OpenSSL Project has fixed a high severity denial-of-service (DoS) vulnerability in OpenSSL tracked as CVE-2017-3733.

The OpenSSL development team has fixed a high severity denial-of-service (DoS) flaw tracked as CVE-2017-3733. This is the second security update released in just two months, the first one addressed four low and moderate severity flaws in the library.

The flaw was reported by Joe Orton of Red Hat on January 31, it has been described as “Encrypt-Then-Mac renegotiation crash.”

“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 to crash (dependent on ciphersuite). Both clients and servers are affected,” reads the advisory published by the OpenSSL Project.

openssl CVE-2017-3733

The issue was fixed with the release of the OpenSSL version 1.1.0e, the development team confirmed that it doesn’t affect the OpenSSL 1.0.2. The version Version 1.0.2 has a long term support (LTS) date of December 31, 2019, and there are no plans for a 1.0.3 release.

Let’s remind that versions 1.0.1, 1.0.0 and 0.9.8 are no more supported and will not receive security updates.

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Pierluigi Paganini

(Security Affairs – CVE-2017-3733, OpenSSL)

Pierluigi Paganini

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer. Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US. Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.