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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(Oracle Issues Fix for Oracle Linux) OpenSSL Multiple Bugs Let Remote Users Decrypt Data, Deny Service, Obtain Potentially Sensitive Information, and Potentially Execute Arbitrary Code
SecurityTracker Alert ID:  1036147
SecurityTracker URL:  http://securitytracker.com/id/1036147
CVE Reference:   CVE-2016-2105, CVE-2016-2106, CVE-2016-2109   (Links to External Site)
Date:  Jun 22 2016
Impact:   Denial of service via local system, Denial of service via network, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via local system, Execution of arbitrary code via network, User access via local system, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 1.0.1t, 1.0.2h
Description:   Multiple vulnerabilities were reported in OpenSSL. A remote user can decrypt data in certain cases. A remote or local user can cause denial of service conditions. A remote user can obtain potentially sensitive information on the target system. A remote or local user may be able to execute arbitrary code on the target application using OpenSSL.

A remote user that can conduct a man-in-the-middle attack can conduct a padding oracle attack against data encrypted with an AES CBC cipher when the target server supports AES-NI to decrypt the data [CVE-2016-2107].

[Editor's note: This vulnerability was introduced in fix for a previous vulnerability known as the Lucky 13 padding attack (CVE-2013-0169).]

Juraj Somorovsky reported this vulnerability.

A remote or local user can supply specially crafted data to trigger an overflow in the EVP_EncodeUpdate() function and cause a heap corruption and cause the target application to crash or potentially execute arbitrary code [CVE-2016-2105]. Applications that call the affected PEM_write_bio* functions may be affected.

Guido Vranken reported this vulnerability.

A remote or local user can supply specially crafted data to trigger an overflow in the EVP_EncryptUpdate() function and cause a heap corruption and cause the target application to crash or potentially execute arbitrary code [CVE-2016-2106]. Applications that call the affected function may be affected.

Guido Vranken reported this vulnerability.

A remote or local user can supply specially crafted ASN.1 data to an application that reads data from a BIO using functions such as d2i_CMS_bio() to trigger a memory allocation error and consume excessive memory on the target system [CVE-2016-2109]. TLS applications are not affected.

Brian Carpenter reported this vulnerability.

An application can supply a specially crafted ASN.1 string longer than 1024 bytes to the X509_NAME_oneline() function on EBCDIC systems to trigger a memory over-read and return arbitrary stack data containing potentially sensitive information [CVE-2016-2176].

Guido Vranken reported this vulnerability.

Impact:   A remote user can decrypt traffic in certain cases.

A remote or local user may be able to execute arbitrary code on the target application that uses OpenSSL.

A remote or local user can cause denial of service conditions on the target system.

A remote user can obtain potentially sensitive information on the target system.

Solution:   Oracle has issued a fix for CVE-2016-2105, CVE-2016-2106, and CVE-2016-2109.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2016-3576.html

Vendor URL:  linux.oracle.com/errata/ELSA-2016-3576.html (Links to External Site)
Cause:   Access control error, Boundary error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  5

Message History:   This archive entry is a follow-up to the message listed below.
May 3 2016 OpenSSL Multiple Bugs Let Remote Users Decrypt Data, Deny Service, Obtain Potentially Sensitive Information, and Potentially Execute Arbitrary Code



 Source Message Contents

Subject:  [El-errata] ELSA-2016-3576 Important: Oracle Linux 5 openssl security update

Oracle Linux Security Advisory ELSA-2016-3576

http://linux.oracle.com/errata/ELSA-2016-3576.html

The following updated rpms for Oracle Linux 5 have been uploaded to the 
Unbreakable Linux Network:

i386:
openssl-0.9.8e-40.0.2.el5_11.i386.rpm
openssl-0.9.8e-40.0.2.el5_11.i686.rpm
openssl-devel-0.9.8e-40.0.2.el5_11.i386.rpm
openssl-perl-0.9.8e-40.0.2.el5_11.i386.rpm

x86_64:
openssl-0.9.8e-40.0.2.el5_11.i686.rpm
openssl-0.9.8e-40.0.2.el5_11.x86_64.rpm
openssl-devel-0.9.8e-40.0.2.el5_11.i386.rpm
openssl-devel-0.9.8e-40.0.2.el5_11.x86_64.rpm
openssl-perl-0.9.8e-40.0.2.el5_11.x86_64.rpm

ia64:
openssl-0.9.8e-40.0.2.el5_11.i686.rpm
openssl-0.9.8e-40.0.2.el5_11.ia64.rpm
openssl-devel-0.9.8e-40.0.2.el5_11.ia64.rpm
openssl-perl-0.9.8e-40.0.2.el5_11.ia64.rpm


SRPMS:
http://oss.oracle.com/ol5/SRPMS-updates/openssl-0.9.8e-40.0.2.el5_11.src.rpm



Description of changes:

[0.9.8e-40.0.2]
- CVE-2016-0799 - Fix memory issues in BIO_*printf functions
- CVE-2016-2105 - Avoid overflow in EVP_EncodeUpdate
- CVE-2016-2106 - Fix encrypt overflow
- CVE-2016-2109 - Harden ASN.1 BIO handling of large amounts of data.


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