Mercurial > hg > nginx-quic
annotate conf/scgi_params @ 7054:e02555553d0b
Range filter: protect from total size overflows.
The overflow can be used to circumvent the restriction on total size of
ranges introduced in c2a91088b0c0 (1.1.2). Additionally, overflow
allows producing ranges with negative start (such ranges can be created
by using a suffix, "bytes=-100"; normally this results in 200 due to
the total size check). These can result in the following errors in logs:
[crit] ... pread() ... failed (22: Invalid argument)
[alert] ... sendfile() failed (22: Invalid argument)
When using cache, it can be also used to reveal cache file header.
It is believed that there are no other negative effects, at least with
standard nginx modules.
In theory, this can also result in memory disclosure and/or segmentation
faults if multiple ranges are allowed, and the response is returned in a
single in-memory buffer. This never happens with standard nginx modules
though, as well as known 3rd party modules.
Fix is to properly protect from possible overflow when incrementing size.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Tue, 11 Jul 2017 16:06:23 +0300 |
parents | 62869a9b2e7d |
children |
rev | line source |
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3637 | 1 |
2 scgi_param REQUEST_METHOD $request_method; | |
3 scgi_param REQUEST_URI $request_uri; | |
4 scgi_param QUERY_STRING $query_string; | |
5 scgi_param CONTENT_TYPE $content_type; | |
6 | |
7 scgi_param DOCUMENT_URI $document_uri; | |
8 scgi_param DOCUMENT_ROOT $document_root; | |
9 scgi_param SCGI 1; | |
10 scgi_param SERVER_PROTOCOL $server_protocol; | |
6168
62869a9b2e7d
Added the REQUEST_SCHEME parameter.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4333
diff
changeset
|
11 scgi_param REQUEST_SCHEME $scheme; |
4333
352a7b025f2e
Added HTTPS param with Apache-like behaviour to fastcgi/scgi/uwsgi_params (fixes #38).
Valentin Bartenev <vbart@nginx.com>
parents:
3637
diff
changeset
|
12 scgi_param HTTPS $https if_not_empty; |
3637 | 13 |
14 scgi_param REMOTE_ADDR $remote_addr; | |
15 scgi_param REMOTE_PORT $remote_port; | |
16 scgi_param SERVER_PORT $server_port; | |
17 scgi_param SERVER_NAME $server_name; |