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Category:   Application (Database)  >   MySQL Vendors:
(Oracle Issues Fix for MySQL) OpenSSL Bugs Let Users Deny Service and Bypass Authentication in Certain Cases
SecurityTracker Alert ID:  1041293
SecurityTracker URL:
CVE Reference:   CVE-2018-0739   (Links to External Site)
Date:  Jul 17 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. MySQL is affected.

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 for MySQL as part of the July 2018 Critical Patch Update.

The MySQL Server Server: Installing component and MySQL Workbench Workbench: Security: Encryption component are affected.

The vendor advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error, Authentication error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

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

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