CVE-2017-3733: Encrypt-Then-Mac renegotiation crash
First published: Thu May 04 2017(Updated: )
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.
Credit: openssl-security@openssl.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenSSL libcrypto | =1.1.0 | |
| OpenSSL libcrypto | =1.1.0a | |
| OpenSSL libcrypto | =1.1.0b | |
| OpenSSL libcrypto | =1.1.0c | |
| OpenSSL libcrypto | =1.1.0d | |
| HP Operations Agent | =11.14 | |
| HP Operations Agent | =11.15 |
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Reference Links
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.securityfocus.com/bid/96269
- http://www.securitytracker.com/id/1037846
- https://github.com/openssl/openssl/commit/4ad93618d26a3ea23d36ad5498ff4f59eff3a4d2
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbgn03728en_us
- https://www.openssl.org/news/secadv/20170216.txt
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
Frequently Asked Questions
What is the severity of CVE-2017-3733?
CVE-2017-3733 is considered a high severity vulnerability due to the potential for OpenSSL to crash during a renegotiation handshake.
How do I fix CVE-2017-3733?
To fix CVE-2017-3733, upgrade OpenSSL to version 1.1.0e or later.
Which versions of OpenSSL are affected by CVE-2017-3733?
CVE-2017-3733 affects OpenSSL versions 1.1.0 through 1.1.0d.
What types of systems are impacted by CVE-2017-3733?
CVE-2017-3733 impacts both client and server systems that utilize the affected versions of OpenSSL.
What is the nature of the issue described in CVE-2017-3733?
CVE-2017-3733 involves a crash that can occur due to a mismatch in the Encrypt-Then-Mac extension during the renegotiation handshake.
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- vendor/openssl
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- version/openssl libcrypto/1.1.0
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- version/openssl libcrypto/1.1.0b
- version/openssl libcrypto/1.1.0c
- version/openssl libcrypto/1.1.0d
- vendor/hp
- canonical/hp operations agent
- version/hp operations agent/11.14
- version/hp operations agent/11.15