Title: SAMBA SWAT Logfile Permissions Vulnerability
Severity: MODERATE
Description:
The Samba software suite is a collection of programs that implements the SMB protocol for unix systems, allowing you to serve files and printers to Windows, NT, OS/2 and DOS clients. This protocol is sometimes also referred to as the LanManager or Netbios protocol. Samba ships with a utility titled SWAT (Samba Web Administration Tool) which is used for remote administration of the Samba server and is by default set to run from inetd as root on port 701. Certain versions of this software ship with a vulnerability local users can use to leverage root access.
This problem in particular is a permissions problem where users can take advantage of poor permission setting in SWAT's log files to read username and password data which SWAT records for all users which login to remotely administrate the server. If logging is turned on (it is not enabled by default) SWAT it logs by default to:
/tmp/cgi.log
This file is world readable and contains usernames and passwords which local users may pull from the file (base64 encoded).
Affected Products:
- Caldera OpenLinux 2.3.0
- Conectiva Linux 4.0.0
- Conectiva Linux 4.0.0 es
- Conectiva Linux 4.1.0
- Conectiva Linux 4.2.0
- Conectiva Linux 5.0.0
- Conectiva Linux 5.1.0
- Conectiva Linux 6.0.0
- Conectiva Linux ecommerce
- Conectiva Linux graficas
- Debian Linux 2.2.0
- Debian Linux 2.2.0 68k
- Debian Linux 2.2.0 alpha
- Debian Linux 2.2.0 arm
- Debian Linux 2.2.0 powerpc
- Debian Linux 2.2.0 sparc
- Debian Linux 2.3.0
- Debian Linux 2.3.0 alpha
- Debian Linux 2.3.0 powerpc
- Debian Linux 2.3.0 sparc
- MandrakeSoft Linux Mandrake 7.0.0
- MandrakeSoft Linux Mandrake 7.1.0
- Progeny Debian 1.0.0
- RedHat Linux 7.0.0
- RedHat Linux 7.0.0 i386
- RedHat Linux 7.0.0 i686
- RedHat Linux 7.1.0
- RedHat Linux 7.1.0 i386
- RedHat Linux 7.1.0 i586
- RedHat Linux 7.1.0 i686
- SCO eDesktop 2.4.0
- SCO eServer 2.3.1
- Samba Samba 2.0.7
- Sun Cobalt Qube3 4000WG
- Sun Cobalt RaQ 550 4100R 0.0.0
- Sun Cobalt RaQ XTR 3500R
- Trustix Secure Linux 1.1.0
- Trustix Secure Linux 1.2.0
- WireX Immunix OS 6.2.0
- WireX Immunix OS 7.0.0
- WireX Immunix OS 7.0.0 -Beta
References:
- Miah: Writeup on the SWAT Vulnerability
- Samba: Samba Homepage
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