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Date: Wed, 26 Apr 2000 20:46:46 -0400
Red Hat, Inc. Security Advisory
Synopsis: Piranha web GUI exposure
1. Topic: The GUI portion of Piranha may allow any remote attacker to execute commands on the server. This may allow a remote attacker to launch additional exploits against a web site from inside the web server. This is an updated release that disables Piranha's web GUI interface unless the site administrator enables it explicitly. 2. Relevant releases/architectures: Red Hat Linux 6.2 - i386 alpha sparc 3. Problem description: When Piranha is installed, it generates a 'secure' web interface ID using the HTML .htaccess method. The information for the account is placed in /home/httpd/html/piranha/secure/passwords which was supposed to be released with a blank password. Unfortunately, the password that is actually on the CD is 'Q'. The original intent was that, when the administrator installed Piranha rpms onto their box, that they would change the default blank password to a password of their own choosing. This is not a hidden account. Its only use is to protect the web pages from unauthorized access. The security problem arises from the http://localhost/piranha/secure/passwd.php3 file. It is possible to execute commands by entering 'blah;some-command' into the password fields. Everything after the semicolon is executed with the same privilege as the webserver. Because of this, it is possible to compromise the webserver or do serious damage to files on the site that are owned by the user 'nobody' or to export a shell using xterm. Updated piranha packages released as version 0.14.3-1 fixed the security vulnerability while still require for the default behavior of requiring the web administrator to reset the password before making the web site public. Because of the security concerns from the community and in order to protect innocent administrators that might not be aware of the need to change the password for Piranha's interface before going live on the Internet, Red Hat is releasing a new set of packages that disable the piranha web interface by default. The site administrator will have to enable the service from the command line by resetting the password as detailed on the main page of the piranha utility. The new packages that include these changes are known as version piranha-0.4.14-1. Users of Red Hat Linux 6.2 are strongly encouraged to upgrade to the new packages if they are actively using piranha on their system (upgrade instructions follow) or to remove the piranha-gui package altogether by issuing the following command: rpm -e piranha-gui 4. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. When you install the update for the piranha-gui, please take a moment to review the instructions presented on the following URL (http://localhost/piranha). This should guide you through the process of installing a password for use with the GUI. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): N/A 6. Obsoleted by: N/A 7. Conflicts with: N/A 8. RPMs required:
Red Hat Linux 6.2:
intel:
alpha:
sparc:
sources:
9. Verification: MD5 sum Package NameThese packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/corp/contact.html
You can verify each package with the following command:
If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
10. References:
This vulnerability was discovered and researched by Allen Wilson and Dan
Ingevaldson of Internet Security Systems. Red Hat would like to thank ISS
for the assistance in getting this problem fixed quickly.
Cristian
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