CVE - CVE-2017-3737

CVE-ID
CVE-2017-3737	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/ CONFIRM:https://www.openssl.org/news/secadv/20171207.txt CONFIRM:https://security.netapp.com/advisory/ntap-20171208-0001/ CONFIRM:https://www.tenable.com/security/tns-2017-16 CONFIRM:http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html CONFIRM:https://security.netapp.com/advisory/ntap-20180117-0002/ CONFIRM:https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc CONFIRM:http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html CONFIRM:https://security.netapp.com/advisory/ntap-20180419-0002/ CONFIRM:http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html CONFIRM:https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf DEBIAN:DSA-4065 URL:https://www.debian.org/security/2017/dsa-4065 FREEBSD:FreeBSD-SA-17:12 URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc GENTOO:GLSA-201712-03 URL:https://security.gentoo.org/glsa/201712-03 REDHAT:RHSA-2018:0998 URL:https://access.redhat.com/errata/RHSA-2018:0998 REDHAT:RHSA-2018:2185 URL:https://access.redhat.com/errata/RHSA-2018:2185 REDHAT:RHSA-2018:2186 URL:https://access.redhat.com/errata/RHSA-2018:2186 REDHAT:RHSA-2018:2187 URL:https://access.redhat.com/errata/RHSA-2018:2187 BID:102103 URL:http://www.securityfocus.com/bid/102103 SECTRACK:1039978 URL:http://www.securitytracker.com/id/1039978
Assigning CNA
OpenSSL Software Foundation
Date Entry Created
20161216	Disclaimer: The entry creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20161216)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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