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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(CentOS Issues Fix) OpenSSL Flaws Let Remote Users Deny Service and Decrypt TLS Sessions in Certain Cases
SecurityTracker Alert ID:  1035154
SecurityTracker URL:  http://securitytracker.com/id/1035154
CVE Reference:   CVE-2016-0797, CVE-2016-0800   (Links to External Site)
Date:  Mar 2 2016
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 1.0.1s, 1.0.2g
Description:   Multiple vulnerabilities were reported in OpenSSL. A remote user can decrypt TLS sessions in certain cases. A remote user can cause denial of service conditions on the target system.

A remote user can decrypt TLS sessions in certain cases by using a server that supports SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle [CVE-2016-0800]. This attack is known as a DROWN attack.

Systems with a private key used on another server for any protocol that allows SSLv2 connections are affected.

Systems running versions prior to 1.0.2a, 1.0.1m, 1.0.0r, and 0.9.8zf (released on March 19, 2015) can be exploited more readily.

The original advisory is available at:

https://drownattack.com/drown-attack-paper.pdf

Nimrod Aviram, Sebastian Schinzel, Juraj Somorovsky, Nadia Heninger, Maik Dankel, Jens Steube, Luke Valenta, David Adrian, J. Alex Halderman, Viktor Dukhovni, Emilia Kasper, Shaanan Cohney, Susanne Engels, Christof Paar, and Yuval Shavitt reported this vulnerability.

A remote user can create a specially crafted private DSA key that, when processed by OpenSSL, will trigger a double free memory error and cause denial of service conditions [CVE-2016-0705].

Adam Langley (Google/BoringSSL) reported this vulnerability.

A remote user can supply a specially crafted username value to the target SRP server to trigger a memory leak [CVE-2016-0798].

Emilia Kasper of the OpenSSL development team reported this vulnerability.

A user can create specially crafted data (e.g., configuration file) that, when processed by OpenSSL, will trigger a null pointer dereference in the BN_hex2bn/BN_dec2bn() functions [CVE-2016-0797].

Guido Vranken reported this vulnerability.

A user can create specially crafted data that, when processed by OpenSSL, will trigger a memory error in BIO_*printf() functions [CVE-2016-0799].

Guido Vranken reported this vulnerability.

A local user can conduct a side-channel attack against a system based on the Intel Sandy-Bridge microarchitecture to potentially recover RSA keys [CVE-2016-0702].

Yuval Yarom, the University of Adelaide and NICTA, Daniel Genkin, Technion and Tel Aviv University, and Nadia Heninger, University of Pennsylvania, reported this vulnerability.

The SSLv2 's2_srvr.c' code does not ensure that a clear-key-length value is 0 for non-export ciphers. As a result, clear-key bytes can displace encrypted-key bytes, which can be exploited to conduct a key recovery attack [CVE-2016-0703].

Versions 1.0.2, 1.0.1l, 1.0.0q, and 0.9.8ze and prior versions are affected.

David Adrian and J. Alex Halderman of the University of Michigan reported this vulnerability.

The Bleichenbacher protection for export cipher suites in 's2_srvr.c' overwrites bytes incorrectly in the master-key, which may provide a Bleichenbacher oracle that can be used to decrypt sessions [CVE-2016-0704].

Versions 1.0.2, 1.0.1l, 1.0.0q, and 0.9.8ze and all prior versions are affected.

David Adrian and J. Alex Halderman of the University of Michigan reported this vulnerability.

A remote user can trigger an out-of-bounds memory write error in doapr_outch() in 'crypto/bio/b_print.c' to potentially execute arbitrary code on the target system [CVE-2016-2842].

Guido Vranken reported this vulnerability.

Impact:   A remote user can decrypt TLS sessions in certain cases.

A remote user can cause denial of service conditions.

A remote user can execute arbitrary code on the target system.

Solution:   CentOS has issued a fix for CVE-2016-0797 and CVE-2016-0800.

i386:
045550a5b7552b7a9cd5ea7a1f866de367e3bf677d240925d633a1b7938cd07a openssl-0.9.8e-39.el5_11.i386.rpm
8c73a864ce991ba4e6c950cc6ca642c09a7753fc5aa793a0a23e683ba5df99e9 openssl-0.9.8e-39.el5_11.i686.rpm
230b07861835e3a65052e45b617a73cbbd3057c6db38d315dbed7b3d01f1fba6 openssl-devel-0.9.8e-39.el5_11.i386.rpm
c63d611b4519928413ed611a020d7e7113ccbf6890b264b4b8399f9af7bf6140 openssl-perl-0.9.8e-39.el5_11.i386.rpm

x86_64:
8c73a864ce991ba4e6c950cc6ca642c09a7753fc5aa793a0a23e683ba5df99e9 openssl-0.9.8e-39.el5_11.i686.rpm
d7e159cfd9e991adf152df48cb97751c8a26601b1f3f3a70a3e137efb05e0c35 openssl-0.9.8e-39.el5_11.x86_64.rpm
230b07861835e3a65052e45b617a73cbbd3057c6db38d315dbed7b3d01f1fba6 openssl-devel-0.9.8e-39.el5_11.i386.rpm
f6bc29a1ab08303174206210af09b37ec53f0c0d643f18bf98427b20f2cb4a67 openssl-devel-0.9.8e-39.el5_11.x86_64.rpm
7953dcc480ff7815f39943f62fc848b3ce7ecb66217d2829332d95be4400c13d openssl-perl-0.9.8e-39.el5_11.x86_64.rpm

Source:
e0dab71e400c340b8eed7770c582ce6f3768888a61b4c492411d20e81ae1a9a6 openssl-0.9.8e-39.el5_11.src.rpm

Cause:   Access control error
Underlying OS:  Linux (CentOS)
Underlying OS Comments:  5

Message History:   This archive entry is a follow-up to the message listed below.
Mar 1 2016 OpenSSL Flaws Let Remote Users Deny Service and Decrypt TLS Sessions in Certain Cases



 Source Message Contents

Subject:  [CentOS-announce] CESA-2016:0302 Important CentOS 5 openssl Security Update


CentOS Errata and Security Advisory 2016:0302 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2016-0302.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( sha256sum Filename ) 

i386:
045550a5b7552b7a9cd5ea7a1f866de367e3bf677d240925d633a1b7938cd07a  openssl-0.9.8e-39.el5_11.i386.rpm
8c73a864ce991ba4e6c950cc6ca642c09a7753fc5aa793a0a23e683ba5df99e9  openssl-0.9.8e-39.el5_11.i686.rpm
230b07861835e3a65052e45b617a73cbbd3057c6db38d315dbed7b3d01f1fba6  openssl-devel-0.9.8e-39.el5_11.i386.rpm
c63d611b4519928413ed611a020d7e7113ccbf6890b264b4b8399f9af7bf6140  openssl-perl-0.9.8e-39.el5_11.i386.rpm

x86_64:
8c73a864ce991ba4e6c950cc6ca642c09a7753fc5aa793a0a23e683ba5df99e9  openssl-0.9.8e-39.el5_11.i686.rpm
d7e159cfd9e991adf152df48cb97751c8a26601b1f3f3a70a3e137efb05e0c35  openssl-0.9.8e-39.el5_11.x86_64.rpm
230b07861835e3a65052e45b617a73cbbd3057c6db38d315dbed7b3d01f1fba6  openssl-devel-0.9.8e-39.el5_11.i386.rpm
f6bc29a1ab08303174206210af09b37ec53f0c0d643f18bf98427b20f2cb4a67  openssl-devel-0.9.8e-39.el5_11.x86_64.rpm
7953dcc480ff7815f39943f62fc848b3ce7ecb66217d2829332d95be4400c13d  openssl-perl-0.9.8e-39.el5_11.x86_64.rpm

Source:
e0dab71e400c340b8eed7770c582ce6f3768888a61b4c492411d20e81ae1a9a6  openssl-0.9.8e-39.el5_11.src.rpm



-- 
Johnny Hughes
CentOS Project { http://www.centos.org/ }
irc: hughesjr, #centos@irc.freenode.net
Twitter: JohnnyCentOS

_______________________________________________
CentOS-announce mailing list
CentOS-announce@centos.org
https://lists.centos.org/mailman/listinfo/centos-announce
 
 


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