SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


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:  1035804
SecurityTracker URL:  http://securitytracker.com/id/1035804
CVE Reference:   CVE-2016-0799, CVE-2016-2842   (Links to External Site)
Date:  May 9 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-2016-0799 and CVE-2016-2842.

x86_64:
5e3c51d681fee532d012c93a5a112885667e775e93ef290d45d8049fcd801d75 openssl-1.0.1e-51.el7_2.5.x86_64.rpm
4b74997828abc8b7272bf326f48eea929caaf8708196fca145b547ef467d2489 openssl-devel-1.0.1e-51.el7_2.5.i686.rpm
6230b86f09b6eac63d2445b2ad1c0b2db6bc0500d678ce945ff791ca12f3a679 openssl-devel-1.0.1e-51.el7_2.5.x86_64.rpm
2c0da28ab356f44800b68fffd8bdd6e77d7bea9cf2360976b6d150e6e4394e4d openssl-libs-1.0.1e-51.el7_2.5.i686.rpm
fa7add3a3f2c6c024359c6b031b0e71dad7ff59422786b27ffbff479413936e0 openssl-libs-1.0.1e-51.el7_2.5.x86_64.rpm
b08aa6e4d8d1b10f2b3d6e3b06e0ab0bcb3a7ba7990f8ca9a454697fafd6fdfe openssl-perl-1.0.1e-51.el7_2.5.x86_64.rpm
757101009b96ace47e31a87390da9a731a3be8fa768f5791b26a5cbeff41297c openssl-static-1.0.1e-51.el7_2.5.i686.rpm
97d662ed69a95e9d919404f10034f17ced2e19e3024567560924743723de532f openssl-static-1.0.1e-51.el7_2.5.x86_64.rpm

Source:
caa1e4aa799629d23f63083c906ee7f37d8db7de81585bd5ce7cb8a444749657 openssl-1.0.1e-51.el7_2.5.src.rpm

Cause:   Access control error
Underlying OS:  Linux (CentOS)
Underlying OS Comments:  7

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-2016:0722 Important CentOS 7 openssl Security Update


CentOS Errata and Security Advisory 2016:0722 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2016-0722.html

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

x86_64:
5e3c51d681fee532d012c93a5a112885667e775e93ef290d45d8049fcd801d75  openssl-1.0.1e-51.el7_2.5.x86_64.rpm
4b74997828abc8b7272bf326f48eea929caaf8708196fca145b547ef467d2489  openssl-devel-1.0.1e-51.el7_2.5.i686.rpm
6230b86f09b6eac63d2445b2ad1c0b2db6bc0500d678ce945ff791ca12f3a679  openssl-devel-1.0.1e-51.el7_2.5.x86_64.rpm
2c0da28ab356f44800b68fffd8bdd6e77d7bea9cf2360976b6d150e6e4394e4d  openssl-libs-1.0.1e-51.el7_2.5.i686.rpm
fa7add3a3f2c6c024359c6b031b0e71dad7ff59422786b27ffbff479413936e0  openssl-libs-1.0.1e-51.el7_2.5.x86_64.rpm
b08aa6e4d8d1b10f2b3d6e3b06e0ab0bcb3a7ba7990f8ca9a454697fafd6fdfe  openssl-perl-1.0.1e-51.el7_2.5.x86_64.rpm
757101009b96ace47e31a87390da9a731a3be8fa768f5791b26a5cbeff41297c  openssl-static-1.0.1e-51.el7_2.5.i686.rpm
97d662ed69a95e9d919404f10034f17ced2e19e3024567560924743723de532f  openssl-static-1.0.1e-51.el7_2.5.x86_64.rpm

Source:
caa1e4aa799629d23f63083c906ee7f37d8db7de81585bd5ce7cb8a444749657  openssl-1.0.1e-51.el7_2.5.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
 
 


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 2020, SecurityGlobal.net LLC