File u_tigervnc-cve-2014-8240.patch of Package tigervnc

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File u_tigervnc-cve-2014-8240.patch of Package tigervnc (Revision da939757fde0648a92aadfab7f8ea38c)

Currently displaying revision da939757fde0648a92aadfab7f8ea38c , Show latest

Patch-Mainline: To be upstreamed
References: bnc#900896 CVE-2014-8240
Signed-off-by: Michal Srb <msrb@suse.com>

Index: b/unix/x0vncserver/Image.cxx
===================================================================
--- a/unix/x0vncserver/Image.cxx
+++ b/unix/x0vncserver/Image.cxx
@@ -82,6 +82,14 @@ void Image::Init(int width, int height)
   xim = XCreateImage(dpy, vis, DefaultDepth(dpy, DefaultScreen(dpy)),
                      ZPixmap, 0, 0, width, height, BitmapPad(dpy), 0);
 
+  if (xim->bytes_per_line <= 0 ||
+      xim->height <= 0 ||
+      xim->height >= INT_MAX / xim->bytes_per_line) {
+    vlog.error("Invalid display size");
+    XDestroyImage(xim);
+    exit(1);
+  }
+
   xim->data = (char *)malloc(xim->bytes_per_line * xim->height);
   if (xim->data == NULL) {
     vlog.error("malloc() failed");
@@ -257,6 +265,17 @@ void ShmImage::Init(int width, int heigh
     delete shminfo;
     shminfo = NULL;
     return;
+  }
+
+  if (xim->bytes_per_line <= 0 ||
+      xim->height <= 0 ||
+      xim->height >= INT_MAX / xim->bytes_per_line) {
+    vlog.error("Invalid display size");
+    XDestroyImage(xim);
+    xim = NULL;
+    delete shminfo;
+    shminfo = NULL;
+    return;
   }
 
   shminfo->shmid = shmget(IPC_PRIVATE,

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File u_tigervnc-cve-2014-8240.patch of Package tigervnc (Revision da939757fde0648a92aadfab7f8ea38c)

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