National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-3737 Detail

Current Description

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.

Source:  MITRE      Last Modified:  12/07/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-3737
Original release date:
12/07/2017
Last revised:
01/23/2018
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
5.9 Medium
Vector:
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N (legend)
Impact Score:
3.6
Exploitability Score:
2.2
CVSS Version 3 Metrics:
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
None
Availability (A):
None
CVSS Severity (version 2.0):
CVSS v2 Base Score:
4.3 MEDIUM
Vector:
(AV:N/AC:M/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore:
2.9
Exploitability Subscore:
8.6
CVSS Version 2 Metrics:
Access Vector:
Network exploitable
Access Complexity:
Medium
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource Type Source Name
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html External Source CONFIRM http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.securityfocus.com/bid/102103 Third Party Advisory; VDB Entry External Source BID 102103
http://www.securitytracker.com/id/1039978 Third Party Advisory; VDB Entry External Source SECTRACK 1039978
https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc External Source CONFIRM https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc Third Party Advisory External Source FREEBSD FreeBSD-SA-17:12
https://security.gentoo.org/glsa/201712-03 Third Party Advisory External Source GENTOO GLSA-201712-03
https://security.netapp.com/advisory/ntap-20171208-0001/ Third Party Advisory External Source CONFIRM https://security.netapp.com/advisory/ntap-20171208-0001/
https://security.netapp.com/advisory/ntap-20180117-0002/ External Source CONFIRM https://security.netapp.com/advisory/ntap-20180117-0002/
https://www.debian.org/security/2017/dsa-4065 Third Party Advisory External Source DEBIAN DSA-4065
https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/ Third Party Advisory External Source MISC https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/
https://www.openssl.org/news/secadv/20171207.txt Vendor Advisory External Source CONFIRM https://www.openssl.org/news/secadv/20171207.txt
https://www.tenable.com/security/tns-2017-16 External Source CONFIRM https://www.tenable.com/security/tns-2017-16

Technical Details

Vulnerability Type (View All)

Change History 10 change records found - show changes