質問編集履歴
3
修正
test
CHANGED
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File without changes
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test
CHANGED
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@@ -1,8 +1,8 @@
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1
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-
#include <stdio.h>
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1
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+
.#include <stdio.h>
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2
2
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3
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-
#include <stdlib.h>
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3
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+
.#include <stdlib.h>
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4
4
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5
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-
#include <string.h>
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5
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+
.#include <string.h>
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6
6
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7
7
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8
8
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2
修正
test
CHANGED
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File without changes
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test
CHANGED
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@@ -1,18 +1,42 @@
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1
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-
int
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1
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+
#include <stdio.h>
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2
2
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3
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-
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3
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+
#include <stdlib.h>
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4
4
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5
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-
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5
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+
#include <string.h>
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6
6
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7
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-
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8
7
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9
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-
strcpy(text, argv[1]);
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10
8
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11
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-
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9
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+
int main(int argc, char *argv[]) {
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12
10
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13
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-
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11
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+
char text[1024];
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14
12
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13
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+
static int test_val = -72;
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14
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+
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15
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+
strcpy(text, argv[1]);
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16
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+
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17
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+
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18
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+
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19
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+
printf("正しい方法：\n");
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20
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+
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21
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+
printf("%s", text);
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22
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+
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23
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+
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24
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+
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25
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+
printf("\n誤った方法：\n");
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26
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+
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27
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+
printf(text);
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28
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+
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29
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+
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30
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+
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31
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+
printf("\n");
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32
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+
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33
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+
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34
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+
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35
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+
// Debug output
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36
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+
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37
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+
printf("[*] test_val @ 0x%08x = %d 0x%08x\n", &test_val, test_val, test_val);
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38
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+
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15
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-
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39
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+
exit(0);
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16
40
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17
41
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}
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18
42
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1
修正
test
CHANGED
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File without changes
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test
CHANGED
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@@ -54,7 +54,7 @@
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54
54
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55
55
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56
56
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57
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-
./test $(printf "\x18\x0c\x60")%08x.%08x.%08x.%08x.%08x.%08x.%08x.%
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57
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+
./test $(printf "\x18\x0c\x60")%08x.%08x.%08x.%08x.%08x.%08x.%08x.%n
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58
58
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59
59
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これで書き換わるはずなのですが・・・・
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60
60
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