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From a54ba07a3a01f21de64ecabaafcc01b40b9db5a4 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Wed, 2 Jan 2019 20:33:08 +0100
Subject: [PATCH 1/3] NTLM: fix size check condition for type2 received data
Reported-by: Wenxiang Qian
---
lib/vauth/ntlm.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/lib/vauth/ntlm.c
+++ b/lib/vauth/ntlm.c
@@ -180,10 +180,11 @@
target_info_len = Curl_read16_le(&buffer[40]);
target_info_offset = Curl_read32_le(&buffer[44]);
if(target_info_len > 0) {
- if(((target_info_offset + target_info_len) > size) ||
+ if((target_info_offset >= size) ||
+ ((target_info_offset + target_info_len) > size) ||
(target_info_offset < 48)) {
infof(data, "NTLM handshake failure (bad type-2 message). "
- "Target Info Offset Len is set incorrect by the peer\n");
+ "Target Info Offset Len is set incorrect by the peer\n");
return CURLE_BAD_CONTENT_ENCODING;
}
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