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Update NS sandbox challenges to check system vendor instead of hostname #3

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Update NS sandbox challenges to check system vendor instead of hostname #3

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Binary file modified sandboxing/level-14/_0/babyjail_level14
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29 changes: 26 additions & 3 deletions sandboxing/level-14/_0/babyjail_level14.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,30 @@
#include <limits.h>
#include <sched.h>

char hostname[128];
long getvendor(char *name, size_t len) {
int fd = open("/sys/devices/virtual/dmi/id/sys_vendor", O_RDONLY);
if (fd == -1) {
return -1;
}

long nbytes = read(fd, name, len - 1);
if (nbytes == -1) {
close(fd);
return -1;
}

name[nbytes] = '\0';

size_t read_len = strlen(name);
if (read_len > 0 && name[read_len - 1] == '\n') {
name[read_len - 1] = '\0';
}

close(fd);
return nbytes;
}

char vendor[128];

int main(int argc, char **argv, char **envp)
{
Expand All @@ -43,8 +66,8 @@ int main(int argc, char **argv, char **envp)
printf("###\n");
printf("\n");

gethostname(hostname, 128);
if (strstr(hostname, "-level") && !strstr(hostname, "vm_"))
getvendor(vendor, 128);
if (strcmp(vendor, "QEMU"))
{
puts("ERROR: in the dojo, this challenge MUST run in virtualization mode.");
puts("Please run `vm connect` to launch and connect to the Virtual Machine, then run this challenge inside the VM.");
Expand Down
Binary file modified sandboxing/level-15/_0/babyjail_level15
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29 changes: 26 additions & 3 deletions sandboxing/level-15/_0/babyjail_level15.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,30 @@
#include <limits.h>
#include <sched.h>

char hostname[128];
long getvendor(char *name, size_t len) {
int fd = open("/sys/devices/virtual/dmi/id/sys_vendor", O_RDONLY);
if (fd == -1) {
return -1;
}

long nbytes = read(fd, name, len - 1);
if (nbytes == -1) {
close(fd);
return -1;
}

name[nbytes] = '\0';

size_t read_len = strlen(name);
if (read_len > 0 && name[read_len - 1] == '\n') {
name[read_len - 1] = '\0';
}

close(fd);
return nbytes;
}

char vendor[128];

int main(int argc, char **argv, char **envp)
{
Expand All @@ -43,8 +66,8 @@ int main(int argc, char **argv, char **envp)
printf("###\n");
printf("\n");

gethostname(hostname, 128);
if (strstr(hostname, "-level") && !strstr(hostname, "vm_"))
getvendor(vendor, 128);
if (strcmp(vendor, "QEMU"))
{
puts("ERROR: in the dojo, this challenge MUST run in virtualization mode.");
puts("Please run `vm connect` to launch and connect to the Virtual Machine, then run this challenge inside the VM.");
Expand Down
Binary file modified sandboxing/level-16/_0/babyjail_level16
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29 changes: 26 additions & 3 deletions sandboxing/level-16/_0/babyjail_level16.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,30 @@
#include <limits.h>
#include <sched.h>

char hostname[128];
long getvendor(char *name, size_t len) {
int fd = open("/sys/devices/virtual/dmi/id/sys_vendor", O_RDONLY);
if (fd == -1) {
return -1;
}

long nbytes = read(fd, name, len - 1);
if (nbytes == -1) {
close(fd);
return -1;
}

name[nbytes] = '\0';

size_t read_len = strlen(name);
if (read_len > 0 && name[read_len - 1] == '\n') {
name[read_len - 1] = '\0';
}

close(fd);
return nbytes;
}

char vendor[128];

int main(int argc, char **argv, char **envp)
{
Expand All @@ -43,8 +66,8 @@ int main(int argc, char **argv, char **envp)
printf("###\n");
printf("\n");

gethostname(hostname, 128);
if (strstr(hostname, "-level") && !strstr(hostname, "vm_"))
getvendor(vendor, 128);
if (strcmp(vendor, "QEMU"))
{
puts("ERROR: in the dojo, this challenge MUST run in virtualization mode.");
puts("Please run `vm connect` to launch and connect to the Virtual Machine, then run this challenge inside the VM.");
Expand Down
Binary file modified sandboxing/level-17/_0/babyjail_level17
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29 changes: 26 additions & 3 deletions sandboxing/level-17/_0/babyjail_level17.c
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Original file line number Diff line number Diff line change
Expand Up @@ -78,7 +78,30 @@ void print_disassembly(void *shellcode_addr, size_t shellcode_size)
#include <limits.h>
#include <sched.h>

char hostname[128];
long getvendor(char *name, size_t len) {
int fd = open("/sys/devices/virtual/dmi/id/sys_vendor", O_RDONLY);
if (fd == -1) {
return -1;
}

long nbytes = read(fd, name, len - 1);
if (nbytes == -1) {
close(fd);
return -1;
}

name[nbytes] = '\0';

size_t read_len = strlen(name);
if (read_len > 0 && name[read_len - 1] == '\n') {
name[read_len - 1] = '\0';
}

close(fd);
return nbytes;
}

char vendor[128];

int main(int argc, char **argv, char **envp)
{
Expand All @@ -92,8 +115,8 @@ int main(int argc, char **argv, char **envp)
printf("###\n");
printf("\n");

gethostname(hostname, 128);
if (strstr(hostname, "-level") && !strstr(hostname, "vm_"))
getvendor(vendor, 128);
if (strcmp(vendor, "QEMU"))
{
puts("ERROR: in the dojo, this challenge MUST run in virtualization mode.");
puts("Please run `vm connect` to launch and connect to the Virtual Machine, then run this challenge inside the VM.");
Expand Down
Binary file modified sandboxing/level-18/_0/babyjail_level18
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29 changes: 26 additions & 3 deletions sandboxing/level-18/_0/babyjail_level18.c
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Original file line number Diff line number Diff line change
Expand Up @@ -78,7 +78,30 @@ void print_disassembly(void *shellcode_addr, size_t shellcode_size)
#include <limits.h>
#include <sched.h>

char hostname[128];
long getvendor(char *name, size_t len) {
int fd = open("/sys/devices/virtual/dmi/id/sys_vendor", O_RDONLY);
if (fd == -1) {
return -1;
}

long nbytes = read(fd, name, len - 1);
if (nbytes == -1) {
close(fd);
return -1;
}

name[nbytes] = '\0';

size_t read_len = strlen(name);
if (read_len > 0 && name[read_len - 1] == '\n') {
name[read_len - 1] = '\0';
}

close(fd);
return nbytes;
}

char vendor[128];

int main(int argc, char **argv, char **envp)
{
Expand All @@ -92,8 +115,8 @@ int main(int argc, char **argv, char **envp)
printf("###\n");
printf("\n");

gethostname(hostname, 128);
if (strstr(hostname, "-level") && !strstr(hostname, "vm_"))
getvendor(vendor, 128);
if (strcmp(vendor, "QEMU"))
{
puts("ERROR: in the dojo, this challenge MUST run in virtualization mode.");
puts("Please run `vm connect` to launch and connect to the Virtual Machine, then run this challenge inside the VM.");
Expand Down