MySQL Bugs: #77046: the Vulnerability in mysql client 5.x （windows）

Bug #77046	the Vulnerability in mysql client 5.x （windows）
Submitted:	15 May 2015 6:14	Modified:	30 Dec 2015 11:38
Reporter:	doggy doggy	Email Updates:
Status:	Can't repeat	Impact on me:	None
Category:	MySQL Server: Compiling	Severity:	S3 (Non-critical)
Version:	5.x	OS:	Windows (windows7 x84)
Assigned to:		CPU Architecture:	Any

Description:
Hello,
 Here, I found a vulnerability in mysql client.
 I edited the source code of mysqld.Here is the POC.

file: mysql-5.1.73\include\mysql_version.h

/* Copyright (c) 1996, 1999-2004, 2007 MySQL AB
   This file is public domain and comes with NO WARRANTY of any kind */
 
/* Version numbers for protocol & mysqld */
 
#ifndef _mysql_version_h
#define _mysql_version_h
#ifdef _CUSTOMCONFIG_
#include <custom_conf.h>
#else
#define PROTOCOL_VERSION	10
#define MYSQL_SERVER_VERSION	"55.1.73"
#define MYSQL_BASE_VERSION	"mysqld-55.1"
#define MYSQL_SERVER_SUFFIX_DEF	"-pro"
#define FRM_VER	6
#define MYSQL_VERSION_ID	50173
#define MYSQL_PORT	3306
#define MYSQL_PORT_DEFAULT	0
#define MYSQL_UNIX_ADDR	"MySQL"
#define MYSQL_CONFIG_NAME	"my"
#define MYSQL_COMPILATION_COMMENT	"Source distributionAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
 
/* mysqld compile time options */
#endif /* _CUSTOMCONFIG_ */
 
#ifndef LICENSE
#define LICENSE	GPL
#endif /* LICENSE */
 
#endif /* _mysql_version_h */

And recompiled.Then I used mysql client to connect the server, and I found it crashed.

How to repeat:
By recompiling the mysql server,and using mysql client to connect it.

Hello!

Thank you for the report.
I'm not seeing this issue with 5.5/5.6 builds.
Could you please confirm from your end with 5.5/5.6? If you can provide more information, feel free to add it to this bug and change the status back to 'Open'.

Thank you for your interest in MySQL.

Thanks,
Umesh

5.5, 5.6, 5.7, 5.8 clients weren't affected.
5.1.73 client encountered this:

[q@q mysql-5.1.73-linux-x86_64-glibc23]$ valgrind --db-attach=yes ./bin/mysql -uroot
==24513==
==24513== Warning: --db-attach is a deprecated feature which will be
==24513==    removed in the next release. Use --vgdb-error=1 instead
==24513==
==24513== Memcheck, a memory error detector
==24513== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==24513== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==24513== Command: ./bin/mysql -uroot -h192.168.1.1
==24513==
Welcome to the MySQL monitor.  Commands end with ; or \g.
==24513== Invalid write of size 1
==24513==    at 0x4C3075C: __GI_mempcpy (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==24513==    by 0x5A53548: _IO_default_xsputn (genops.c:464)
==24513==    by 0x5A22A4C: vfprintf (vfprintf.c:1635)
==24513==    by 0x5A4897A: vsprintf (iovsprintf.c:42)
==24513==    by 0x5A2BD46: sprintf (sprintf.c:32)
==24513==    by 0x4441D0: main (mysql.cc:1172)
==24513==  Address 0x63cba78 is 0 bytes after a block of size 520 alloc'd
==24513==    at 0x4C29BFD: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==24513==    by 0x471B41: my_malloc (my_malloc.c:37)
==24513==    by 0x44535B: String::realloc(unsigned int) (sql_string.cc:79)
==24513==    by 0x4440F6: main (mysql.cc:1148)
==24513==

Let us know if you can repeat the problem using 5.5 or newer client.