SecurityTracker.com
Keep Track of the Latest Vulnerabilities
with SecurityTracker!
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


Try our Premium Alert Service
 
Sign Up
Sign Up for Your FREE Weekly SecurityTracker E-mail Alert Summary
Instant Alerts
Buy our Premium Vulnerability Notification Service to receive customized, instant alerts
Affiliates
Put SecurityTracker Vulnerability Alerts on Your Web Site -- It's Free!
Partners
Become a Partner and License Our Database or Notification Service





Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
SecurityTracker Alert ID:  1039978
SecurityTracker URL:  http://securitytracker.com/id/1039978
CVE Reference:   CVE-2017-3737, CVE-2017-3738   (Links to External Site)
Updated:  Mar 27 2018
Original Entry Date:  Dec 7 2017
Impact:   Disclosure of authentication information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 1.0.2n
Description:   Two vulnerabilities were reported in OpenSSL. A remote user can obtain potentially sensitive information on the target system in certain cases. A remote user may be able to cause an application to bypass decryption/encryption in certain limited cases.

A remote user can exploit an overflow bug in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli to potentially determine information about the private key in certain situations [CVE-2017-3738].

Processors that support the AVX2 but not ADX extensions (e.g., Intel Haswell (4th generation)) are affected.

Attacks against DH1024 may be feasible.

EC algorithms are not affected.

A remote user can invoke a handshake failure to trigger a bug in OpenSSL error handling code for applications that directly make an SSL_read() or SSL_write() call for an SSL object after receiving a fatal error, causing data to bypass the decryption or encryption process [CVE-2017-3737]. Versions 1.0.2b and after are affected.

David Benjamin (Google) reported these vulnerabilities.

Impact:   A remote user can potentially determine information about the private key in certain situations.

A remote user may be able to cause an application to bypass decryption/encryption in certain limited cases.

Solution:   The vendor has issued a fix (1.0.2n).

[Editor's note: The fix for CVE-2017-3738 for version 1.1.0 is available in version 1.1.0h.]

The vendor advisories are available at:

https://www.openssl.org/news/secadv/20171207.txt
https://www.openssl.org/news/secadv/20180327.txt

Vendor URL:  www.openssl.org/news/secadv/20171207.txt (Links to External Site)
Cause:   Boundary error, State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Dec 9 2017 (FreeBSD Issues Fix) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
FreeBSD has issued a fix for FreeBSD 10.3, 10.4, 11.0, and 11.1.
Jan 25 2018 (Tenable Network Security Issues Fix for Tenable SecurityCenter) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
Tenable Network Security has issued a fix for Tenable SecurityCenter.
Jan 30 2018 (IBM Issues Fix for IBM AIX) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
IBM has issued a fix for IBM AIX 5.3, 6.1, 7.1, and 7.2.
Apr 13 2018 (Red Hat Issues Fix) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Apr 13 2018 (Red Hat Issues Fix) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Apr 18 2018 (Oracle Issues Fix for Sun Secure Global Desktop) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
Oracle has issued a fix for Sun Secure Global Desktop.
Apr 27 2018 (IBM Issues Fix for IBM InfoSphere Information Server) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
IBM has issued a fix for IBM InfoSphere Information Server.
Apr 28 2018 (Juniper Issues Fix for Juniper Junos) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
Juniper has issued a fix for Juniper Junos.
Apr 28 2018 (Juniper Issues Fix for Juniper NSM) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
Juniper has issued a fix for Juniper NSM.
May 10 2018 (Tenable Network Security Issues Fix for Tenable SecurityCenter) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
Tenable Network Security has issued a fix for Tenable SecurityCenter.
Jul 13 2018 (Red Hat Issues Fix for Red Hat JBoss) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
Red Hat has issued a fix for Red Hat JBoss for Red Hat Enterprise Linux.



 Source Message Contents

Subject:  [openssl-announce] OpenSSL Security Advisory

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256


OpenSSL Security Advisory [07 Dec 2017]
========================================

Read/write after SSL object in error state (CVE-2017-3737)
==========================================================

Severity: Moderate

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.

This issue does not affect OpenSSL 1.1.0.

OpenSSL 1.0.2 users should upgrade to 1.0.2n

This issue was reported to OpenSSL on 10th November 2017 by David Benjamin
(Google). The fix was proposed by David Benjamin and implemented by Matt Caswell
of the OpenSSL development team.

rsaz_1024_mul_avx2 overflow bug on x86_64 (CVE-2017-3738)
=========================================================

Severity: Low

There is an overflow bug in the AVX2 Montgomery multiplication procedure
used in exponentiation with 1024-bit moduli. No EC algorithms are affected.
Analysis suggests that attacks against RSA and DSA as a result of this defect
would be very difficult to perform and are not believed likely. Attacks
against DH1024 are considered just feasible, because most of the work
necessary to deduce information about a private key may be performed offline.
The amount of resources required for such an attack would be significant.
However, for an attack on TLS to be meaningful, the server would have to share
the DH1024 private key among multiple clients, which is no longer an option
since CVE-2016-0701.

This only affects processors that support the AVX2 but not ADX extensions
like Intel Haswell (4th generation).

Note: The impact from this issue is similar to CVE-2017-3736, CVE-2017-3732
and CVE-2015-3193.

Due to the low severity of this issue we are not issuing a new release of
OpenSSL 1.1.0 at this time. The fix will be included in OpenSSL 1.1.0h when it
becomes available. The fix is also available in commit e502cc86d in the OpenSSL
git repository.

OpenSSL 1.0.2 users should upgrade to 1.0.2n

This issue was reported to OpenSSL on 22nd November 2017 by David Benjamin
(Google). The issue was originally found via the OSS-Fuzz project. The fix was
developed by Andy Polyakov of the OpenSSL development team.

Note
====

Support for version 1.0.1 ended on 31st December 2016. Support for versions
0.9.8 and 1.0.0 ended on 31st December 2015. Those versions are no longer
receiving security updates.

References
==========

URL for this Security Advisory:
https://www.openssl.org/news/secadv/20171207.txt

Note: the online version of the advisory may be updated with additional details
over time.

For details of OpenSSL severity classifications please see:
https://www.openssl.org/policies/secpolicy.html
-----BEGIN PGP SIGNATURE-----

iQEcBAEBCAAGBQJaKUFJAAoJENnE0m0OYESRp1UH/1Z8hBb1dM82Lnn3b0pQ1LjF
xBqs0cBFax6z8gelZzUI3CEJe78n3YB6jJiyCDOvrsrb9dx4kGvt97R9x9Np6glh
/cL98I1mVwLdLciE1WeBPBFDijp5Bii4pz3q4StFGmh9g9cQ70onz8OO0RB9GSS5
dpbRcbOZLcyt3Lnqmnx86SLAdGgF635SO0EE10txDXjgEUK3Zo+gT+/jelwoNLXT
mtYfqgXp6+Eqa08Qq3Nmrgqz4azhFLD5szixmnXQwbP+OpiT+zpNXsV5qqemWFn9
aV2qzDJJtrpObaPXSqKCBUA7C1qYmj9OmeaDUVJ29vS1mm09hs18if954ib6nbw=
=MmWs
-----END PGP SIGNATURE-----
-- 
openssl-announce mailing list
To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-announce
 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2018, SecurityGlobal.net LLC