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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
SecurityTracker Alert ID:  1036088
SecurityTracker URL:  http://securitytracker.com/id/1036088
CVE Reference:   CVE-2016-2177   (Links to External Site)
Date:  Jun 14 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in OpenSSL. A remote user can cause denial of service conditions on the target system.

A remote user can send specially crafted data to trigger an integer overflow in ssl3_get_client_hello() and potentially cause the target service to crash.

Guido Vranken reported this vulnerability.

Impact:   A remote user can cause denial of service conditions.
Solution:   The vendor has issued a source code fix, available at:

https://github.com/openssl/openssl/commit/a004e72b95835136d3f1ea90517f706c24c03da7

Vendor URL:  openssl.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 23 2016 (FreeBSD Issues Fix) OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
FreeBSD has issued a fix for FreeBSD 9.3, 10.1, 10.2, 10.3, and 11.0.
Oct 17 2016 (Oracle Issues Fix for Oracle Linux) OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
Oracle has issued a fix for Oracle Linux 5.
Oct 27 2016 (HP Issues Advisory for HPE IceWall) OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
HPE has issued an advisory for HPE IceWall.
Nov 15 2016 (IBM Issues Fix for IBM AIX) OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
IBM has issued a fix for IBM AIX 5.3, 6.1, 7.1, and 7.2.
Jan 26 2017 (Red Hat Issues Fix for Red Hat JBoss Core Services) OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
Red Hat has issued a fix for Red Hat JBoss Core Services for Red Hat Enterprise Linux 6 and 7.
Jan 31 2017 (Ubuntu Issues Fix) OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
Ubuntu has issued a fix for Ubuntu Linux 12.04 LTS, 14.04 LTS, 16.04 LTS, and 16.10.
Mar 22 2017 (IBM Issues Fix for IBM Rational ClearQuest) OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
IBM has issued a fix for IBM Rational ClearQuest.
Apr 8 2017 (IBM Issues Fix for IBM WebSphere MQ) OpenSSL Integer Overflow in ssl3_get_client_hello() Lets Remote Users Deny Service
IBM has issued a fix for IBM WebSphere MQ on NonStop Server.



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