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CVE-2017-3733

Date: May 4, 2017

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.

Language: C

Severity Score

Related Resources (11)

http://www.securityfocus.com/bid/96269
https://nvd.nist.gov/vuln/detail/CVE-2017-3733
https://github.com/openssl/openssl/commit/4ad93618d26a3ea23d36ad5498ff4f59eff3a4d2
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbgn03728en_us
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
http://www.securitytracker.com/id/1037846
https://security-tracker.debian.org/tracker/CVE-2017-3733
https://www.openssl.org/news/secadv/20170216.txt
https://www.mend.io/vulnerability-database/CVE-2017-3733

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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