Mercurial > hg > nginx
view auto/configure @ 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> |
---|---|
date | Tue, 11 Jul 2017 16:06:23 +0300 |
parents | e69d5e9be292 |
children | 4a343228c55e |
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#!/bin/sh # Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. LC_ALL=C export LC_ALL . auto/options . auto/init . auto/sources test -d $NGX_OBJS || mkdir -p $NGX_OBJS echo > $NGX_AUTO_HEADERS_H echo > $NGX_AUTOCONF_ERR echo "#define NGX_CONFIGURE \"$NGX_CONFIGURE\"" > $NGX_AUTO_CONFIG_H if [ $NGX_DEBUG = YES ]; then have=NGX_DEBUG . auto/have fi if test -z "$NGX_PLATFORM"; then echo "checking for OS" NGX_SYSTEM=`uname -s 2>/dev/null` NGX_RELEASE=`uname -r 2>/dev/null` NGX_MACHINE=`uname -m 2>/dev/null` echo " + $NGX_SYSTEM $NGX_RELEASE $NGX_MACHINE" NGX_PLATFORM="$NGX_SYSTEM:$NGX_RELEASE:$NGX_MACHINE"; case "$NGX_SYSTEM" in MINGW32_*) NGX_PLATFORM=win32 ;; esac else echo "building for $NGX_PLATFORM" NGX_SYSTEM=$NGX_PLATFORM fi . auto/cc/conf if [ "$NGX_PLATFORM" != win32 ]; then . auto/headers fi . auto/os/conf if [ "$NGX_PLATFORM" != win32 ]; then . auto/unix fi . auto/threads . auto/modules . auto/lib/conf case ".$NGX_PREFIX" in .) NGX_PREFIX=${NGX_PREFIX:-/usr/local/nginx} have=NGX_PREFIX value="\"$NGX_PREFIX/\"" . auto/define ;; .!) NGX_PREFIX= ;; *) have=NGX_PREFIX value="\"$NGX_PREFIX/\"" . auto/define ;; esac if [ ".$NGX_CONF_PREFIX" != "." ]; then have=NGX_CONF_PREFIX value="\"$NGX_CONF_PREFIX/\"" . auto/define fi have=NGX_SBIN_PATH value="\"$NGX_SBIN_PATH\"" . auto/define have=NGX_CONF_PATH value="\"$NGX_CONF_PATH\"" . auto/define have=NGX_PID_PATH value="\"$NGX_PID_PATH\"" . auto/define have=NGX_LOCK_PATH value="\"$NGX_LOCK_PATH\"" . auto/define have=NGX_ERROR_LOG_PATH value="\"$NGX_ERROR_LOG_PATH\"" . auto/define have=NGX_HTTP_LOG_PATH value="\"$NGX_HTTP_LOG_PATH\"" . auto/define have=NGX_HTTP_CLIENT_TEMP_PATH value="\"$NGX_HTTP_CLIENT_TEMP_PATH\"" . auto/define have=NGX_HTTP_PROXY_TEMP_PATH value="\"$NGX_HTTP_PROXY_TEMP_PATH\"" . auto/define have=NGX_HTTP_FASTCGI_TEMP_PATH value="\"$NGX_HTTP_FASTCGI_TEMP_PATH\"" . auto/define have=NGX_HTTP_UWSGI_TEMP_PATH value="\"$NGX_HTTP_UWSGI_TEMP_PATH\"" . auto/define have=NGX_HTTP_SCGI_TEMP_PATH value="\"$NGX_HTTP_SCGI_TEMP_PATH\"" . auto/define . auto/make . auto/lib/make . auto/install # STUB . auto/stubs have=NGX_USER value="\"$NGX_USER\"" . auto/define have=NGX_GROUP value="\"$NGX_GROUP\"" . auto/define if [ ".$NGX_BUILD" != "." ]; then have=NGX_BUILD value="\"$NGX_BUILD\"" . auto/define fi . auto/summary