>Description:
MySQL crashes when a remote computer attempts to make a standard
connection. Making a local connection does not cause this problem,
connecting to other systems does not cause this problem, but a connection
from a remote computer to mySQL immediately crashes mySQL.
The details I have available (from safe_mysqld restarting) is [the
segfault is at the exact moment we connect via mysql from a remote
computer]:
[root@george root]# Starting mysqld daemon with databases from
/var/lib/mysql
/usr/bin/safe_mysqld: line 269: 17274 Segmentation fault
$NOHUP_NICENESS $ledir/$MYSQLD $defaults --basedir=$MY_BASEDIR_VERSION
--datadir=$DATADIR $USER_OPTION --pid-file=$pid_file --skip-locking
>>$err_log 2>&1
Number of processes running now: 2
mysqld process hanging, pid 17277 - killed
mysqld process hanging, pid 17277 - killed
021108 22:16:03 mysqld restarted
>How-To-Repeat:
Connect from another computer on the internet. Use the mysql
client. This syntax does it for us:
mysql -hhostname -ppassword
>Fix:
Unknown
>Submitter-Id: W_DW
>Originator: root
>Organization:
sqlcoders
>MySQL support: none
>Synopsis: Remote connection crash server (also possible attack
method)
>Severity: critical
>Priority: high
>Category: mysql
>Class: sw-bug
>Release: mysql-3.23.41 (Source distribution)
>Environment:
System: Linux ensim.rackshack.net 2.4.18-17.7.x #1 Tue Oct 8 13:33:14 EDT 2002 i686
unknown
Architecture: i686
Some paths: /usr/bin/perl /usr/bin/make /usr/bin/gmake /usr/bin/gcc /usr/bin/cc
GCC: Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.2 2.96-108.7.2)
Compilation info: CC='gcc' CFLAGS='-O2 -march=i386 -mcpu=i686 -D_GNU_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE' CXX='c++' CXXFLAGS='-O2 -march=i386
-mcpu=i686 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE' LDFLAGS=''
LIBC:
lrwxrwxrwx 1 root root 13 Oct 25 07:09 /lib/libc.so.6 -> libc-2.2.4.so
-rwxr-xr-x 2 root root 1285884 Sep 9 12:10 /lib/libc-2.2.4.so
-rw-r--r-- 1 root root 27336078 Sep 9 11:48 /usr/lib/libc.a
-rw-r--r-- 1 root root 178 Sep 9 11:48 /usr/lib/libc.so
Configure command: ./configure i386-redhat-linux --prefix=/usr --exec-prefix=/usr
--bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share
--includedir=/usr/include --libdir=/usr/lib --libexecdir=/usr/libexec
--localstatedir=/var --sharedstatedir=/usr/com --mandir=/usr/share/man
--infodir=/usr/share/info --without-debug --without-readline --enable-shared
--with-extra-charsets=complex --with-bench --localstatedir=/var/lib/mysql
--with-unix-socket-path=/var/lib/mysql/mysql.sock --with-mysqld-user=mysql
--with-extra-charsets=all --disable-assember --with-berkeley-db
--enable-large-files=yes --enable-largefile=yes --with-thread-safe-client
--enable-assembler
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