CVE-2017-3733

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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.

References

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

Details

Source: MITRE

Published: 2017-05-04

Updated: 2019-04-23

Type: CWE-20

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH

Tenable Plugins

View all (4 total)

IDNameProductFamilySeverity
103930Oracle VM VirtualBox 5.1.x < 5.1.30 (October 2017 CPU)NessusMisc.
critical
97328OpenSSL 1.1.0 < 1.1.0e Encrypt-Then-Mac Extension DoSNessusWeb Servers
high
9971OpenSSL 1.1.0 < 1.1.0e DoSNessus Network MonitorWeb Servers
high
97219FreeBSD : openssl -- crash on handshake (1a802ba9-f444-11e6-9940-b499baebfeaf)NessusFreeBSD Local Security Checks
high