Dialog.c: fix possible buffer overflows

Fix write past the end of singlePath if PATH contains dirs longer than PATH_MAX.

1 files changed, 13 insertions, 0 deletions

diff --git a/nx-X11/programs/Xserver/hw/nxagent/Display.c b/nx-X11/programs/Xserver/hw/nxagent/Display.c
index f523dacde..d4e032046 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Display.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Display.c
@@ -1842,6 +1842,13 @@ static FILE *nxagentLookForIconFile(char *iconName, const char *permission,
 
     if (end != NULL)
     {
+      if ((end - path) > sizeof(singlePath) - 1)
+      {
+        fprintf(stderr, "Warning: Path too long - ignored.\n");
+        path = end + 1;
+        continue;
+      }
+
       strncpy(singlePath, path, (unsigned long)(end - path));
 
       singlePath[(unsigned long)(end - path)] = '\0';
@@ -1850,6 +1857,12 @@ static FILE *nxagentLookForIconFile(char *iconName, const char *permission,
     }
     else
     {
+      if (strlen(path) > sizeof(singlePath) - 1)
+      {
+        fprintf(stderr, "Error: Path too long.\n");
+        return NULL;
+      }
+
       strcpy(singlePath, path);
 
       breakLoop = 1;