Major Security Flaw with apache on FC3

[fedora]

Some updates
I recompiled the FC4 httpd version 2.0.54-10
Same behaviour, really fishy this ..
*** glibc detected *** double free or corruption (fasttop): 0x08f33598 ***

I suspect apr, gonna recompiel that and retry ...
But I am surprised nobody can reproduce that, coz this fc3 box is pretty 
standard packages installation

Stay tuned :)



Fedora Mailing List wrote:

>
>
> Alexander Dalloz wrote:
>
>> Am Mo, den 04.07.2005 schrieb Fedora Mailing List um 16:06:
>>
>>  
>>
>>> The Scenario :
>>>
>>> get this php filemanager :
>>> http://phpfm.sourceforge.net/#downloads
>>> simply unzip into your web site directory
>>>
>>> I have vhosts under a /data dir
>>>
>>> rights 711 on the vhost dir, all fine
>>> drwx--x--x  19 john data 4096 Jun 24 15:35 www.test.com
>>>
>>> after calling the php file manager http://site.name/index.php
>>> the rights on the directory are made world writeable
>>>
>>> drwxrwxrwx  13 john data 4096 Jul  4 15:39 www.test.com
>>>
>>> SCARY ---
>>>   
>>
>>
>> The problem is phpfm then.
>>
>>  
>>
>>> apache error.log:
>>>
>>> [Mon Jul 04 15:43:44 2005] [error] [client x.x.x.x] Premature end of 
>>> script headers: index.php, referer: http://www.test.com/index.php
>>> [Mon Jul 04 15:43:44 2005] [error] [client x.x.x.x] SoftException in 
>>> Application.cpp:227: Directory "/data/www.test.com" is writeable by 
>>> group, referer: http://www.test.com/index.php
>>> [Mon Jul 04 15:43:44 2005] [error] [client x.x.x.x] *** glibc 
>>> detected *** double free or corruption (fasttop): 0x099c6590 ***, 
>>> referer: http://www.test.com/index.php
>>> [Mon Jul 04 15:43:44 2005] [error] [client x.x.x.x] File does not 
>>> exist: /data/www.test.com/favicon.ico
>>> [Mon Jul 04 15:44:09 2005] [error] [client x.x.x.x] File does not 
>>> exist: /data/www.test.com/favicon.ico
>>> [Mon Jul 04 15:44:19 2005] [error] [client x.x.x.x] Premature end of 
>>> script headers: index.php, referer: http://www.test.com/index.php
>>> [Mon Jul 04 15:44:19 2005] [error] [client x.x.x.x] SoftException in 
>>> Application.cpp:227: Directory "/data/www.test.com" is writeable by 
>>> group, referer: http://www.test.com/index.php
>>> [Mon Jul 04 15:44:19 2005] [error] [client x.x.x.x] *** glibc 
>>> detected *** double free or corruption (fasttop): 0x08e16590 ***, 
>>> referer: http://www.test.com/index.php
>>>
>>>
>>> Switching between suphp and mod_php didtn change anything .. the 
>>> rights on the dir are changed no matter
>>> (the error above are with suphp enabled, with mod_php I didnt get 
>>> any error but the same result)
>>>   
>>
>>
>> I have doubts that Apache (user apache) is able to change filesystem
>> permissions when it does not own a directory and no extension like suphp
>> is configured or suExec is set.
>>
>>  
>>
>>> On FC4 the problem didnt occur
>>> ------------
>>> System Fedora Core 3 - No Selinux
>>>
>>>
>>> httpd -V
>>> Server version: Apache/2.0.54
>>>   
>>
>>
>> That is no FC3 Apache!
>>
>> $ rpm -q httpd
>> httpd-2.0.52-3.1
>>
>> $ httpd -v
>> Server version: Apache/2.0.52
>> Server built:   Nov 11 2004 10:31:42
>>
>>  
>>
>>> Server built:   Apr 18 2005 21:03:32
>>> Server's Module Magic Number: 20020903:9
>>> Architecture:   32-bit
>>> Server compiled with....
>>> -D APACHE_MPM_DIR="server/mpm/prefork"
>>> -D APR_HAS_SENDFILE
>>> -D APR_HAS_MMAP
>>> -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
>>> -D APR_USE_SYSVSEM_SERIALIZE
>>> -D APR_USE_PTHREAD_SERIALIZE
>>> -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
>>> -D APR_HAS_OTHER_CHILD
>>> -D AP_HAVE_RELIABLE_PIPED_LOGS
>>> -D HTTPD_ROOT="/etc/httpd"
>>> -D SUEXEC_BIN="/usr/sbin/suexec"
>>> -D DEFAULT_PIDLOG="logs/httpd.pid"
>>> -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
>>> -D DEFAULT_LOCKFILE="logs/accept.lock"
>>> -D DEFAULT_ERRORLOG="logs/error_log"
>>>   
>>
>>
>>  
>>
>>> I didnt trace and debug the thing yet, pretty in a hurry right now, 
>>> to find out what may have caused it ... if any1 heared about it .. ?
>>>   
>>
>>
>> I would say phpfm is broken or misconfigured. I miss the proof that a
>> plain FC3 Apache2 with only mod_php - no suPHP, nor running suExec with
>> PHP cgi scripts - is able to change filesystem permissions for
>> directories / files the apache user does not own.
>>
>> Alexander
>>
>>  
>>
>
> Yes it has been rebuilt using
> httpd-2.0.54-3.src.rpm from a fedora mirror and rebuilt with
> rpmbuild -ba SPECS/httpd.spec
> But the rest are geniun updated fc3 packages .. so something is 
> actually doing that
> I will dig into it, just running out of time today :)
> Cheers
> -P
>