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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:  1035139
SecurityTracker URL:  http://securitytracker.com/id/1035139
CVE Reference:   CVE-2016-0702, CVE-2016-0705, CVE-2016-0797, CVE-2016-0800   (Links to External Site)
Date:  Mar 1 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-2016-0702, CVE-2016-0705, CVE-2016-0797, and CVE-2016-0800.

i386:
31cacdfe88b5e4b420bd2dd1fe6b491b35a2a57c7e3b4ef5b960573b095fc519 openssl-1.0.1e-42.el6_7.4.i686.rpm
a57701c0598a7c91de1eac55fa5b6ffe2bc096c07f757723d6de65dd092dbc66 openssl-devel-1.0.1e-42.el6_7.4.i686.rpm
3e62aef02b5a465d587a3c3dfec494b27d55ec2a5dac0a13e6ac842188728d66 openssl-perl-1.0.1e-42.el6_7.4.i686.rpm
621cd98e6d221febb477906443a1692afd64ffcc79cb843a146ee4583e7224f7 openssl-static-1.0.1e-42.el6_7.4.i686.rpm

x86_64:
31cacdfe88b5e4b420bd2dd1fe6b491b35a2a57c7e3b4ef5b960573b095fc519 openssl-1.0.1e-42.el6_7.4.i686.rpm
e5fc87d5031ea23db0eb2be92743a557d8574caa583fad6a1cd16a757ed436f3 openssl-1.0.1e-42.el6_7.4.x86_64.rpm
a57701c0598a7c91de1eac55fa5b6ffe2bc096c07f757723d6de65dd092dbc66 openssl-devel-1.0.1e-42.el6_7.4.i686.rpm
17b6a4dbe2f844d3944fa7c4cafe9ccf4d54a8dc23d26201a513fc86bd08d256 openssl-devel-1.0.1e-42.el6_7.4.x86_64.rpm
4b9ec40e680ad72d6134283f3ab6179d2c4c8a34433aed4f42c5117bfeb300a5 openssl-perl-1.0.1e-42.el6_7.4.x86_64.rpm
aaaf4d42ef5f48f424ed9d6d04744e906a15d3ae66097bcd3ec60be226879cd6 openssl-static-1.0.1e-42.el6_7.4.x86_64.rpm

Source:
152d1ec6f40854680bbad1524f2b7766c8f583de6b1a136b635ec9b257d4b088 openssl-1.0.1e-42.el6_7.4.src.rpm

x86_64:
b2aaed03ed2d01d2a6482ed97a95aec0545ffc4c00ad46c7cafc10c9554e1b58 openssl-1.0.1e-51.el7_2.4.x86_64.rpm
b1aa349c2ea3a99cc65d031850d415b7feb7924f0a121593c12b439934440eb4 openssl-devel-1.0.1e-51.el7_2.4.i686.rpm
3e194452a2616702ee91e791b163b739d012da52957f6e91927de9d554e4e203 openssl-devel-1.0.1e-51.el7_2.4.x86_64.rpm
2e193ea886626e3e8b151f905920503e2e505cc2bdfef31a8d38a581c99e210f openssl-libs-1.0.1e-51.el7_2.4.i686.rpm
249cc7d68c0d8d48a26b50066ed29da2d70c7a573d23dc566ee7c99f5c5f71c9 openssl-libs-1.0.1e-51.el7_2.4.x86_64.rpm
61cfe9edcb1d521b2978fee1acda2a9cba73f2c371bc9217b44bd527569938c5 openssl-perl-1.0.1e-51.el7_2.4.x86_64.rpm
a5d2395db7a0c87d069e3fc80e55deacffeea5acc5162058075a746871954ce7 openssl-static-1.0.1e-51.el7_2.4.i686.rpm
e48dd73a4f9bc7d3b6617842414a1b50fc086c720795451ca4795ecd08ba3b22 openssl-static-1.0.1e-51.el7_2.4.x86_64.rpm

Source:
26fa86503898fa5fcf91188aa6f56172ea1896e4d4943bd407aa54d21d330618 openssl-1.0.1e-51.el7_2.4.src.rpm

Cause:   Access control error
Underlying OS:  Linux (CentOS)
Underlying OS Comments:  6, 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-2016:0301 Important CentOS 7 openssl Security Update


CentOS Errata and Security Advisory 2016:0301 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2016-0301.html

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

x86_64:
b2aaed03ed2d01d2a6482ed97a95aec0545ffc4c00ad46c7cafc10c9554e1b58  openssl-1.0.1e-51.el7_2.4.x86_64.rpm
b1aa349c2ea3a99cc65d031850d415b7feb7924f0a121593c12b439934440eb4  openssl-devel-1.0.1e-51.el7_2.4.i686.rpm
3e194452a2616702ee91e791b163b739d012da52957f6e91927de9d554e4e203  openssl-devel-1.0.1e-51.el7_2.4.x86_64.rpm
2e193ea886626e3e8b151f905920503e2e505cc2bdfef31a8d38a581c99e210f  openssl-libs-1.0.1e-51.el7_2.4.i686.rpm
249cc7d68c0d8d48a26b50066ed29da2d70c7a573d23dc566ee7c99f5c5f71c9  openssl-libs-1.0.1e-51.el7_2.4.x86_64.rpm
61cfe9edcb1d521b2978fee1acda2a9cba73f2c371bc9217b44bd527569938c5  openssl-perl-1.0.1e-51.el7_2.4.x86_64.rpm
a5d2395db7a0c87d069e3fc80e55deacffeea5acc5162058075a746871954ce7  openssl-static-1.0.1e-51.el7_2.4.i686.rpm
e48dd73a4f9bc7d3b6617842414a1b50fc086c720795451ca4795ecd08ba3b22  openssl-static-1.0.1e-51.el7_2.4.x86_64.rpm

Source:
26fa86503898fa5fcf91188aa6f56172ea1896e4d4943bd407aa54d21d330618  openssl-1.0.1e-51.el7_2.4.src.rpm



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

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


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