tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

NetworkPkg: better sanity check on Ipv6 prefix length 

Fix a possible buffer overrun issue that could occur if PrefixLength >
128 . Changed == 128 to >= 128. Also remove check for Byte < 16, which
is no longer possible because of the first change.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Samer El-Haj-Mahmoud <elhaj@hpe.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
This commit is contained in:
Samer El-Haj-Mahmoud 2016-02-12 07:57:59 +08:00 committed by Fu Siyuan
parent 93aea44f42
commit 40696972bf
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
NetworkPkg/Ip6Dxe/Ip6Icmp.c
View File

@ -2,7 +2,8 @@
The ICMPv6 handle routines to process the ICMPv6 control messages.
Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@ -479,7 +480,7 @@ Ip6GetPrefix (
return ;
}
if (PrefixLength == IP6_PREFIX_NUM - 1) {
if (PrefixLength >= IP6_PREFIX_NUM - 1) {
return ;
}
@ -487,7 +488,7 @@ Ip6GetPrefix (
Bit = (UINT8) (PrefixLength % 8);
Value = Prefix->Addr[Byte];
if ((Byte > 0) && (Byte < 16)) {
if (Byte > 0) {
ZeroMem (Prefix->Addr + Byte, 16 - Byte);
}