tightvnc: add patches for four CVEs

Security fixes for: * CVE-2019-8287 * CVE-2019-15678 * CVE-2019-15679 * CVE-2019-15680 mostly adapted from patches fixing similar issues in the actively maintained libvnc (#73970)
2019-11-24 19:44:01 +01:00
parent 1206faa6d5
commit 2482f8b8dc
5 changed files with 74 additions and 0 deletions
@@ -0,0 +1,18 @@
+Adapted from https://github.com/LibVNC/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b92757bc2a
+diff --git a/vncviewer/rfbproto.c b/vncviewer/rfbproto.c
+index 04b0230..47a6863 100644
+--- a/vncviewer/rfbproto.c
+++ b/vncviewer/rfbproto.c
+@@ -1217,6 +1217,12 @@ HandleRFBServerMessage()
+     if (serverCutText)
+       free(serverCutText);
+ 
+    if (msg.sct.length > 1<<20) {
+      fprintf(stderr,"Ignoring too big cut text length sent by server: %u B > 1 MB\n",
+              (unsigned int)msg.sct.length);
+      return False;
+    }
+
+     serverCutText = malloc(msg.sct.length+1);
+ 
+     if (!ReadFromRFBServer(serverCutText, msg.sct.length))