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Diffstat (limited to 'net-libs/libvncserver/files/libvncserver-0.9.12-CVE-2018-20750.patch')
-rw-r--r--net-libs/libvncserver/files/libvncserver-0.9.12-CVE-2018-20750.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/net-libs/libvncserver/files/libvncserver-0.9.12-CVE-2018-20750.patch b/net-libs/libvncserver/files/libvncserver-0.9.12-CVE-2018-20750.patch
new file mode 100644
index 000000000000..55f122d12584
--- /dev/null
+++ b/net-libs/libvncserver/files/libvncserver-0.9.12-CVE-2018-20750.patch
@@ -0,0 +1,47 @@
+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 01/51] 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 7af8490..f2edbee 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;
+--
+2.23.0
+