+++ /dev/null
-Upstream-Status: Backport
-CVE: CVE-2022-22707
-Signed-off-by: Ross Burton <ross.burton@arm.com>
-
-From 27103f3f8b1a2857aa45b889e775435f7daf141f Mon Sep 17 00:00:00 2001
-From: povcfe <povcfe@qq.com>
-Date: Wed, 5 Jan 2022 11:11:09 +0000
-Subject: [PATCH] [mod_extforward] fix out-of-bounds (OOB) write (fixes #3134)
-
-(thx povcfe)
-
-(edited: gstrauss)
-
-There is a potential remote denial of service in lighttpd mod_extforward
-under specific, non-default and uncommon 32-bit lighttpd mod_extforward
-configurations.
-
-Under specific, non-default and uncommon lighttpd mod_extforward
-configurations, a remote attacker can trigger a 4-byte out-of-bounds
-write of value '-1' to the stack. This is not believed to be exploitable
-in any way beyond triggering a crash of the lighttpd server on systems
-where the lighttpd server has been built 32-bit and with compiler flags
-which enable a stack canary -- gcc/clang -fstack-protector-strong or
--fstack-protector-all, but bug not visible with only -fstack-protector.
-
-With standard lighttpd builds using -O2 optimization on 64-bit x86_64,
-this bug has not been observed to cause adverse behavior, even with
-gcc/clang -fstack-protector-strong.
-
-For the bug to be reachable, the user must be using a non-default
-lighttpd configuration which enables mod_extforward and configures
-mod_extforward to accept and parse the "Forwarded" header from a trusted
-proxy. At this time, support for RFC7239 Forwarded is not common in CDN
-providers or popular web server reverse proxies. It bears repeating that
-for the user to desire to configure lighttpd mod_extforward to accept
-"Forwarded", the user must also be using a trusted proxy (in front of
-lighttpd) which understands and actively modifies the "Forwarded" header
-sent to lighttpd.
-
-lighttpd natively supports RFC7239 "Forwarded"
-hiawatha natively supports RFC7239 "Forwarded"
-
-nginx can be manually configured to add a "Forwarded" header
-https://www.nginx.com/resources/wiki/start/topics/examples/forwarded/
-
-A 64-bit build of lighttpd on x86_64 (not known to be affected by bug)
-in front of another 32-bit lighttpd will detect and reject a malicious
-"Forwarded" request header, thereby thwarting an attempt to trigger
-this bug in an upstream 32-bit lighttpd.
-
-The following servers currently do not natively support RFC7239 Forwarded:
-nginx
-apache2
-caddy
-node.js
-haproxy
-squid
-varnish-cache
-litespeed
-
-Given the general dearth of support for RFC7239 Forwarded in popular
-CDNs and web server reverse proxies, and given the prerequisites in
-lighttpd mod_extforward needed to reach this bug, the number of lighttpd
-servers vulnerable to this bug is estimated to be vanishingly small.
-Large systems using reverse proxies are likely running 64-bit lighttpd,
-which is not known to be adversely affected by this bug.
-
-In the future, it is desirable for more servers to implement RFC7239
-Forwarded. lighttpd developers would like to thank povcfe for reporting
-this bug so that it can be fixed before more CDNs and web servers
-implement RFC7239 Forwarded.
-
-x-ref:
- "mod_extforward plugin has out-of-bounds (OOB) write of 4-byte -1"
- https://redmine.lighttpd.net/issues/3134
- (not yet written or published)
- CVE-2022-22707
----
- src/mod_extforward.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/src/mod_extforward.c b/src/mod_extforward.c
-index ba957e04..fdaef7f6 100644
---- a/src/mod_extforward.c
-+++ b/src/mod_extforward.c
-@@ -715,7 +715,7 @@ static handler_t mod_extforward_Forwarded (request_st * const r, plugin_data * c
- while (s[i] == ' ' || s[i] == '\t') ++i;
- if (s[i] == ';') { ++i; continue; }
- if (s[i] == ',') {
-- if (j >= (int)(sizeof(offsets)/sizeof(int))) break;
-+ if (j >= (int)(sizeof(offsets)/sizeof(int))-1) break;
- offsets[++j] = -1; /*("offset" separating params from next proxy)*/
- ++i;
- continue;
---
-2.25.1
-
lighttpd-module-accesslog"
SRC_URI = "http://download.lighttpd.net/lighttpd/releases-1.4.x/lighttpd-${PV}.tar.xz \
- file://0001-mod_extforward-fix-out-of-bounds-OOB-write-fixes-313.patch \
file://index.html.lighttpd \
file://lighttpd.conf \
file://lighttpd \
"
-SRC_URI[sha256sum] = "2aef7f0102ebf54a1241a1c3ea8976892f8684bfb21697c9fffb8de0e2d6eab9"
+SRC_URI[sha256sum] = "e1489d9fa7496fbf2e071c338b593b2300d38c23f1e5967e52c9ef482e1b0e26"
DEPENDS = "virtual/crypt"
PACKAGECONFIG[bzip2] = "-Dwith_bzip=true,-Dwith_bzip=false,bzip2"
PACKAGECONFIG[webdav-props] = "-Dwith_webdav_props=true,-Dwith_webdav_props=false,libxml2 sqlite3"
PACKAGECONFIG[webdav-locks] = "-Dwith_webdav_locks=true,-Dwith_webdav_locks=false,util-linux"
-PACKAGECONFIG[gdbm] = "-Dwith_gdbm=true,-Dwith_gdbm=false,gdbm"
-PACKAGECONFIG[memcache] = "-Dwith_memcached=true,-Dwith_memcached=false,libmemcached"
PACKAGECONFIG[lua] = "-Dwith_lua=true,-Dwith_lua=false,lua"
PACKAGECONFIG[zstd] = "-Dwith_zstd=true,-Dwith_zstd=false,zstd"
