Catch access to paths that are just "." or ".." without any path sepa…

…rator. (transplanted from b6d25a1927c2274cf31166a74b87b24e2752e0e8)
icculus · Oct 26, 2017 · 179bd1d · 179bd1d
1 parent a802619
commit 179bd1d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/physfs.c b/src/physfs.c
@@ -939,6 +939,10 @@ static int sanitizePlatformIndependentPath(const char *src, char *dst)
     while (*src == '/')  /* skip initial '/' chars... */
         src++;
 
+    /* Make sure the entire string isn't "." or ".." */
+    if ((strcmp(src, ".") == 0) || (strcmp(src, "..") == 0))
+        BAIL(PHYSFS_ERR_BAD_FILENAME, 0);
+
     prev = dst;
     do
     {