mirror of
https://github.com/Ponce/slackbuilds
synced 2024-11-16 19:50:19 +01:00
59 lines
2.2 KiB
Diff
59 lines
2.2 KiB
Diff
From f7d268864a2660b7239b9a8ff5ad37faeeb751ba Mon Sep 17 00:00:00 2001
|
|
From: Jouni Malinen <jouni@codeaurora.org>
|
|
Date: Wed, 3 Jun 2020 22:41:02 +0300
|
|
Subject: [PATCH 2/3] WPS UPnP: Fix event message generation using a long URL
|
|
path
|
|
|
|
More than about 700 character URL ended up overflowing the wpabuf used
|
|
for building the event notification and this resulted in the wpabuf
|
|
buffer overflow checks terminating the hostapd process. Fix this by
|
|
allocating the buffer to be large enough to contain the full URL path.
|
|
However, since that around 700 character limit has been the practical
|
|
limit for more than ten years, start explicitly enforcing that as the
|
|
limit or the callback URLs since any longer ones had not worked before
|
|
and there is no need to enable them now either.
|
|
|
|
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
|
|
---
|
|
src/wps/wps_upnp.c | 9 +++++++--
|
|
src/wps/wps_upnp_event.c | 3 ++-
|
|
2 files changed, 9 insertions(+), 3 deletions(-)
|
|
|
|
diff --git a/src/wps/wps_upnp.c b/src/wps/wps_upnp.c
|
|
index 7d4b7439940e..ab685d52ecab 100644
|
|
--- a/src/wps/wps_upnp.c
|
|
+++ b/src/wps/wps_upnp.c
|
|
@@ -328,9 +328,14 @@ static void subscr_addr_add_url(struct subscription *s, const char *url,
|
|
int rerr;
|
|
size_t host_len, path_len;
|
|
|
|
- /* url MUST begin with http: */
|
|
- if (url_len < 7 || os_strncasecmp(url, "http://", 7))
|
|
+ /* URL MUST begin with HTTP scheme. In addition, limit the length of
|
|
+ * the URL to 700 characters which is around the limit that was
|
|
+ * implicitly enforced for more than 10 years due to a bug in
|
|
+ * generating the event messages. */
|
|
+ if (url_len < 7 || os_strncasecmp(url, "http://", 7) || url_len > 700) {
|
|
+ wpa_printf(MSG_DEBUG, "WPS UPnP: Reject an unacceptable URL");
|
|
goto fail;
|
|
+ }
|
|
url += 7;
|
|
url_len -= 7;
|
|
|
|
diff --git a/src/wps/wps_upnp_event.c b/src/wps/wps_upnp_event.c
|
|
index d7e6edcc6503..08a23612f338 100644
|
|
--- a/src/wps/wps_upnp_event.c
|
|
+++ b/src/wps/wps_upnp_event.c
|
|
@@ -147,7 +147,8 @@ static struct wpabuf * event_build_message(struct wps_event_ *e)
|
|
struct wpabuf *buf;
|
|
char *b;
|
|
|
|
- buf = wpabuf_alloc(1000 + wpabuf_len(e->data));
|
|
+ buf = wpabuf_alloc(1000 + os_strlen(e->addr->path) +
|
|
+ wpabuf_len(e->data));
|
|
if (buf == NULL)
|
|
return NULL;
|
|
wpabuf_printf(buf, "NOTIFY %s HTTP/1.1\r\n", e->addr->path);
|
|
--
|
|
2.20.1
|
|
|