mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-30 16:12:58 -05:00
a789f654a0
* gnu/packages/vnc.scm (libvnc): New variable. gnu/packages/patches/libvnc-CVE-2018-20750.patch, gnu/packages/patches/libvnc-CVE-2019-15681.patch: New files. * gnu/local.mk: Add them.
44 lines
1.8 KiB
Diff
44 lines
1.8 KiB
Diff
From 09e8fc02f59f16e2583b34fe1a270c238bd9ffec Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
|
|
Date: Mon, 7 Jan 2019 10:40:01 +0100
|
|
Subject: [PATCH] Limit lenght to INT_MAX bytes in
|
|
rfbProcessFileTransferReadBuffer()
|
|
|
|
This ammends 15bb719c03cc70f14c36a843dcb16ed69b405707 fix for a heap
|
|
out-of-bound write access in rfbProcessFileTransferReadBuffer() when
|
|
reading a transfered file content in a server. The former fix did not
|
|
work on platforms with a 32-bit int type (expected by rfbReadExact()).
|
|
|
|
CVE-2018-15127
|
|
<https://github.com/LibVNC/libvncserver/issues/243>
|
|
<https://github.com/LibVNC/libvncserver/issues/273>
|
|
---
|
|
libvncserver/rfbserver.c | 7 ++++++-
|
|
1 file changed, 6 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
|
|
index 7af84906..f2edbeea 100644
|
|
--- a/libvncserver/rfbserver.c
|
|
+++ b/libvncserver/rfbserver.c
|
|
@@ -88,6 +88,8 @@
|
|
#include <errno.h>
|
|
/* strftime() */
|
|
#include <time.h>
|
|
+/* INT_MAX */
|
|
+#include <limits.h>
|
|
|
|
#ifdef LIBVNCSERVER_WITH_WEBSOCKETS
|
|
#include "rfbssl.h"
|
|
@@ -1472,8 +1474,11 @@ char *rfbProcessFileTransferReadBuffer(rfbClientPtr cl, uint32_t length)
|
|
0XFFFFFFFF, i.e. SIZE_MAX for 32-bit systems. On 64-bit systems, a length of 0XFFFFFFFF
|
|
will safely be allocated since this check will never trigger and malloc() can digest length+1
|
|
without problems as length is a uint32_t.
|
|
+ We also later pass length to rfbReadExact() that expects a signed int type and
|
|
+ that might wrap on platforms with a 32-bit int type if length is bigger
|
|
+ than 0X7FFFFFFF.
|
|
*/
|
|
- if(length == SIZE_MAX) {
|
|
+ if(length == SIZE_MAX || length > INT_MAX) {
|
|
rfbErr("rfbProcessFileTransferReadBuffer: too big file transfer length requested: %u", (unsigned int)length);
|
|
rfbCloseClient(cl);
|
|
return NULL;
|