From a8153d8ae525ac62f7bf10062a78cda945972467 Mon Sep 17 00:00:00 2001
From: "Marius Petrescu, YO2LOJ" <marius@yo2loj.ro>
Date: Sat, 16 Jan 2021 01:43:05 +0200
Subject: [PATCH] Update buffer allocation to the correct size
Maximum size of ICMP packet is 64k while buffer allocation was UDP_BUFFER_LENMAX, while read was up to 64k.
This will cause a crash on read in the subsequent read for packets with length greater than UDP_BUFFER_LENMAX via a buffer overflow.
---
src/crawsocket.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/crawsocket.cpp b/src/crawsocket.cpp
index a30908d..119dbb1 100644
--- a/src/crawsocket.cpp
+++ b/src/crawsocket.cpp
@@ -92,7 +92,7 @@ int CRawSocket::Receive(CBuffer *Buffer, CIp *Ip, int timeout)
if ( m_Socket != -1 )
{
// allocate buffer
- Buffer->resize(UDP_BUFFER_LENMAX);
+ Buffer->resize(RAW_BUFFER_LENMAX);
// control socket
FD_ZERO(&FdSet);