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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(Oracle Issues Fix for Oracle Linux) OpenSSL Bugs Let Users Deny Service and Bypass Authentication in Certain Cases
SecurityTracker Alert ID:  1041727
SecurityTracker URL:  http://securitytracker.com/id/1041727
CVE Reference:   CVE-2018-0739   (Links to External Site)
Date:  Sep 27 2018
Impact:   Denial of service via network, Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in OpenSSL. A user can cause denial of service conditions on the target system. A user can bypass authentication in certain cases.

A user can create specially crafted ASN.1 data with a recursive definition that, when processed by the target application using the OpenSSL library, will consume excessive stack memory [CVE-2018-0739]. SSL/TLS is not an attack vector.

The PA-RISC CRYPTO_memcmp() function used on HP-UX PA-RISC targets does not properly compare byte values [CVE-2018-0733]. As a result, a user can create forged messages, some of which may be authenticated. The vulnerable module is only compiled by the HP-UX assembler. Version 1.1.0 is affected.

Peter Waltenberg (IBM) reported the CRYPTO_memcmp() vulnerability.

Impact:   A user can cause denial of service conditions.

A user can bypass authentication on the target system in certain cases.

Solution:   Oracle has issued a fix for CVE-2018-0739.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2018-4228.html

Vendor URL:  linux.oracle.com/errata/ELSA-2018-4228.html (Links to External Site)
Cause:   Access control error, Authentication error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Mar 27 2018 OpenSSL Bugs Let Users Deny Service and Bypass Authentication in Certain Cases



 Source Message Contents

Subject:  [El-errata] ELSA-2018-4228 Important: Oracle Linux 6 openssl security update

Oracle Linux Security Advisory ELSA-2018-4228

http://linux.oracle.com/errata/ELSA-2018-4228.html

The following updated rpms for Oracle Linux 6 have been uploaded to the 
Unbreakable Linux Network:

i386:
openssl-1.0.1e-57.0.5.el6.i686.rpm
openssl-devel-1.0.1e-57.0.5.el6.i686.rpm
openssl-perl-1.0.1e-57.0.5.el6.i686.rpm
openssl-static-1.0.1e-57.0.5.el6.i686.rpm

x86_64:
openssl-1.0.1e-57.0.5.el6.i686.rpm
openssl-1.0.1e-57.0.5.el6.x86_64.rpm
openssl-devel-1.0.1e-57.0.5.el6.i686.rpm
openssl-devel-1.0.1e-57.0.5.el6.x86_64.rpm
openssl-perl-1.0.1e-57.0.5.el6.x86_64.rpm
openssl-static-1.0.1e-57.0.5.el6.x86_64.rpm


SRPMS:
http://oss.oracle.com/ol6/SRPMS-updates/openssl-1.0.1e-57.0.5.el6.src.rpm



Description of changes:

[1.0.1e-57.0.5]
- Merge upstream patch to fix CVE-2018-0739


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