mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-28 01:28:59 +00:00
8d903be35a
This backports a fix for: * CVE-2018-0500 SMTP send heap buffer overflow See here for details: https://curl.haxx.se/docs/adv_2018-70a2.html Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
33 lines
1001 B
Diff
33 lines
1001 B
Diff
From ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Stenberg <daniel@haxx.se>
|
|
Date: Wed, 13 Jun 2018 12:24:40 +0200
|
|
Subject: [PATCH] smtp: use the upload buffer size for scratch buffer malloc
|
|
|
|
... not the read buffer size, as that can be set smaller and thus cause
|
|
a buffer overflow! CVE-2018-0500
|
|
|
|
Reported-by: Peter Wu
|
|
Bug: https://curl.haxx.se/docs/adv_2018-70a2.html
|
|
---
|
|
lib/smtp.c | 3 ++-
|
|
1 file changed, 2 insertions(+), 1 deletion(-)
|
|
|
|
--- a/lib/smtp.c
|
|
+++ b/lib/smtp.c
|
|
@@ -1563,13 +1563,14 @@ CURLcode Curl_smtp_escape_eob(struct con
|
|
if(!scratch || data->set.crlf) {
|
|
oldscratch = scratch;
|
|
|
|
- scratch = newscratch = malloc(2 * data->set.buffer_size);
|
|
+ scratch = newscratch = malloc(2 * UPLOAD_BUFSIZE);
|
|
if(!newscratch) {
|
|
failf(data, "Failed to alloc scratch buffer!");
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
+ DEBUGASSERT(UPLOAD_BUFSIZE >= nread);
|
|
|
|
/* Have we already sent part of the EOB? */
|
|
eob_sent = smtp->eob;
|