Bug 1331536 (CVE-2016-2106)

Summary: CVE-2016-2106 openssl: EVP_EncryptUpdate overflow
Product: [Other] Security Response Reporter: Tomas Hoger <thoger>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akjain, anemec, bbaranow, bmaxwell, cdewolf, chazlett, csutherl, dandread, darran.lofthouse, dosoudil, erik-fedora, fnasser, gzaronik, hkario, huwang, huzaifas, jaeshin, jason.greene, jawilson, jclere, jdoyle, ktietz, lgao, marcandre.lureau, mbabacek, mturk, myarboro, pgier, psakar, pslavice, redhat-bugzilla, rhatlapa, rjones, rnetuka, rsvoboda, ryan.parman, sardella, security-response-team, slawomir, tmraz, twalsh, vtunka, weli, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
See Also: https://issues.redhat.com/browse/JBCS-86
Whiteboard:
Fixed In Version: openssl 1.0.1t, openssl 1.0.2h Doc Type: Bug Fix
Doc Text:
An integer overflow flaw, leading to a buffer overflow, was found in the way the EVP_EncryptUpdate() function of OpenSSL parsed very large amounts of input data. A remote attacker could use this flaw to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2017-02-22 12:27:56 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1331569, 1331570, 1331865, 1331866, 1332588, 1332589, 1332590, 1332591, 1332976, 1337153, 1337154, 1337155, 1366994    
Bug Blocks: 1330106, 1395463    
Attachments:
Description Flags
OpenSSL upstream fix none

Description Tomas Hoger 2016-04-28 18:02:27 UTC 
Quoting form the draft of OpenSSL upstream advisory:

EVP_EncryptUpdate overflow (CVE-2016-2106)
==========================================

Severity: Low

An overflow can occur in the EVP_EncryptUpdate() function. If an attacker is
able to supply very large amounts of input data after a previous call to
EVP_EncryptUpdate() with a partial block then a length check can overflow
resulting in a heap corruption. Following an analysis of all OpenSSL internal
usage of the EVP_EncryptUpdate() function all usage is one of two forms.
The first form is where the EVP_EncryptUpdate() call is known to be the first
called function after an EVP_EncryptInit(), and therefore that specific call
must be safe. The second form is where the length passed to EVP_EncryptUpdate()
can be seen from the code to be some small value and therefore there is no
possibility of an overflow. Since all instances are one of these two forms, it
is believed that there can be no overflows in internal code due to this problem.
It should be noted that EVP_DecryptUpdate() can call EVP_EncryptUpdate() in
certain code paths. Also EVP_CipherUpdate() is a synonym for
EVP_EncryptUpdate(). All instances of these calls have also been too and it is
believed there are no instances in internal usage where an overflow could occur.

This could still represent a security issue for end user code that calls this
function directly.

OpenSSL 1.0.2 users should upgrade to 1.0.2h
OpenSSL 1.0.1 users should upgrade to 1.0.1t

This issue was reported to OpenSSL on 3rd March 2016 by Guido Vranken. The
fix was developed by Matt Caswell of the OpenSSL development team.
Comment 1 Tomas Hoger 2016-04-28 18:02:39 UTC 
Acknowledgments:

Name: the OpenSSL project
Upstream: Guido Vranken
Comment 2 Tomas Hoger 2016-04-28 18:04:01 UTC 
Created attachment 1152021 [details]
OpenSSL upstream fix
Comment 5 Martin Prpič 2016-05-03 14:19:34 UTC 
External References:

https://openssl.org/news/secadv/20160503.txt
Comment 6 Martin Prpič 2016-05-03 14:28:54 UTC 
Created openssl101e tracking bugs for this issue:

Affects: epel-5 [bug 1332590]
Comment 7 Martin Prpič 2016-05-03 14:29:01 UTC 
Created openssl tracking bugs for this issue:

Affects: fedora-all [bug 1332588]
Comment 8 Martin Prpič 2016-05-03 14:29:07 UTC 
Created mingw-openssl tracking bugs for this issue:

Affects: fedora-all [bug 1332589]
Affects: epel-7 [bug 1332591]
Comment 9 Tomas Hoger 2016-05-04 12:55:22 UTC 
Upstream commit:

https://git.openssl.org/?p=openssl.git;a=commitdiff;h=3f3582139fbb259a1c3cbb0a25236500a409bf26
Comment 11 Fedora Update System 2016-05-04 18:51:23 UTC 
openssl-1.0.2h-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 12 Fedora Update System 2016-05-07 11:38:30 UTC 
openssl-1.0.2h-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 13 errata-xmlrpc 2016-05-09 09:29:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:0722 https://rhn.redhat.com/errata/RHSA-2016-0722.html
Comment 14 errata-xmlrpc 2016-05-10 04:21:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:0996 https://rhn.redhat.com/errata/RHSA-2016-0996.html
Comment 17 Fedora Update System 2016-05-10 17:51:55 UTC 
openssl-1.0.1k-15.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 19 Fedora Update System 2016-05-27 23:16:32 UTC 
openssl101e-1.0.1e-8.el5 has been pushed to the Fedora EPEL 5 stable repository. If problems still persist, please make note of it in this bug report.
Comment 30 errata-xmlrpc 2016-08-22 18:09:43 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 2.1.1

Via RHSA-2016:1650 https://rhn.redhat.com/errata/RHSA-2016-1650.html
Comment 31 errata-xmlrpc 2016-08-22 18:11:32 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Web Server 2 for RHEL 6

Via RHSA-2016:1649 https://rhn.redhat.com/errata/RHSA-2016-1649.html
Comment 32 errata-xmlrpc 2016-08-22 18:12:26 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Web Server 2 for RHEL 7

Via RHSA-2016:1648 https://rhn.redhat.com/errata/RHSA-2016-1648.html
Comment 33 errata-xmlrpc 2016-10-12 17:01:11 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 6.4.10

Via RHSA-2016:2056 https://rhn.redhat.com/errata/RHSA-2016-2056.html
Comment 34 errata-xmlrpc 2016-10-12 17:09:31 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 7

Via RHSA-2016:2054 https://rhn.redhat.com/errata/RHSA-2016-2054.html
Comment 35 errata-xmlrpc 2016-10-12 17:20:17 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 6

Via RHSA-2016:2055 https://rhn.redhat.com/errata/RHSA-2016-2055.html
Comment 38 errata-xmlrpc 2016-10-18 07:09:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.7 Extended Update Support

Via RHSA-2016:2073 https://rhn.redhat.com/errata/RHSA-2016-2073.html
Comment 40 errata-xmlrpc 2016-12-15 22:17:56 UTC 
This issue has been addressed in the following products:



Via RHSA-2016:2957 https://rhn.redhat.com/errata/RHSA-2016-2957.html