Mercurial > hg > nginx
annotate auto/summary @ 7060:1adc6b0d5eaa stable-1.12
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 | 9eefb38f0005 |
children | 0b5f12d5c531 |
rev | line source |
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1 |
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2 # Copyright (C) Igor Sysoev |
4412 | 3 # Copyright (C) Nginx, Inc. |
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6 echo |
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7 echo "Configuration summary" |
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8 |
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9 |
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10 if [ $USE_THREADS = YES ]; then |
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11 echo " + using threads" |
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12 fi |
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13 |
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14 if [ $USE_PCRE = DISABLED ]; then |
501 | 15 echo " + PCRE library is disabled" |
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16 |
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17 else |
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18 case $PCRE in |
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19 YES) echo " + using system PCRE library" ;; |
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20 NONE) echo " + PCRE library is not used" ;; |
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21 *) echo " + using PCRE library: $PCRE" ;; |
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22 esac |
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23 fi |
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24 |
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25 case $OPENSSL in |
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26 YES) echo " + using system OpenSSL library" ;; |
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27 NONE) echo " + OpenSSL library is not used" ;; |
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28 *) echo " + using OpenSSL library: $OPENSSL" ;; |
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29 esac |
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31 case $ZLIB in |
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32 YES) echo " + using system zlib library" ;; |
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33 NONE) echo " + zlib library is not used" ;; |
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34 *) echo " + using zlib library: $ZLIB" ;; |
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35 esac |
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36 |
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37 case $NGX_LIBATOMIC in |
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38 YES) echo " + using system libatomic_ops library" ;; |
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39 NO) ;; # not used |
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40 *) echo " + using libatomic_ops library: $NGX_LIBATOMIC" ;; |
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41 esac |
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42 |
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43 echo |
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45 |
479 | 46 cat << END |
493 | 47 nginx path prefix: "$NGX_PREFIX" |
48 nginx binary file: "$NGX_SBIN_PATH" | |
6383 | 49 nginx modules path: "$NGX_MODULES_PATH" |
1352 | 50 nginx configuration prefix: "$NGX_CONF_PREFIX" |
493 | 51 nginx configuration file: "$NGX_CONF_PATH" |
52 nginx pid file: "$NGX_PID_PATH" | |
479 | 53 END |
54 | |
469 | 55 if test -n "$NGX_ERROR_LOG_PATH"; then |
493 | 56 echo " nginx error log file: \"$NGX_ERROR_LOG_PATH\"" |
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57 else |
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58 echo " nginx logs errors to stderr" |
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59 fi |
479 | 60 |
61 cat << END | |
493 | 62 nginx http access log file: "$NGX_HTTP_LOG_PATH" |
63 nginx http client request body temporary files: "$NGX_HTTP_CLIENT_TEMP_PATH" | |
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64 END |
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65 |
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66 if [ $HTTP_PROXY = YES ]; then |
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67 echo " nginx http proxy temporary files: \"$NGX_HTTP_PROXY_TEMP_PATH\"" |
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68 fi |
479 | 69 |
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70 if [ $HTTP_FASTCGI = YES ]; then |
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71 echo " nginx http fastcgi temporary files: \"$NGX_HTTP_FASTCGI_TEMP_PATH\"" |
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72 fi |
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73 |
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74 if [ $HTTP_UWSGI = YES ]; then |
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75 echo " nginx http uwsgi temporary files: \"$NGX_HTTP_UWSGI_TEMP_PATH\"" |
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76 fi |
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77 |
3637 | 78 if [ $HTTP_SCGI = YES ]; then |
79 echo " nginx http scgi temporary files: \"$NGX_HTTP_SCGI_TEMP_PATH\"" | |
80 fi | |
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81 |
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82 echo "$NGX_POST_CONF_MSG" |