CVE-2017-3737

Impact:
Moderate
Public Date:
2017-12-07
CWE:
CWE-391
Bugzilla:
1523504: CVE-2017-3737 openssl: Read/write after SSL object in error state

The MITRE CVE dictionary describes this issue as:

OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.

Find out more about CVE-2017-3737 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

CVSS3 Base Score 5.9
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact None
Availability Impact None

Red Hat Security Errata

Platform Errata Release Date
Red Hat JBoss Core Services on RHEL 7 Server RHSA-2018:2185 2018-07-12
Red Hat Enterprise Linux 7 (openssl) RHSA-2018:0998 2018-04-10
Red Hat JBoss Core Services 1 RHSA-2018:2187 2018-07-12
Red Hat JBoss Core Services on RHEL 6 Server RHSA-2018:2186 2018-07-12

Affected Packages State

Platform Package State
Red Hat JBoss Web Server 3.0 openssl Not affected
Red Hat JBoss Web Server 3 openssl Affected
Red Hat JBoss EWS 2 openssl Will not fix
Red Hat JBoss EAP 6 openssl Will not fix
Red Hat JBoss EAP 5 openssl Not affected
Red Hat Enterprise Linux 7 openssl098e Not affected
Red Hat Enterprise Linux 7 OVMF Not affected
Red Hat Enterprise Linux 6 openssl Not affected
Red Hat Enterprise Linux 6 openssl098e Not affected
Red Hat Enterprise Linux 5 openssl097a Not affected
Red Hat Enterprise Linux 5 openssl Not affected
RHEV Manager 3 mingw-virt-viewer Not affected

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation

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