ConfigServer eXploit Scanner (cxs) is a new tool from us that performs
active scanning of files as they are uploaded to the server.
Active scanning can be performed on all text files:
- Actively on all file uploads within user accounts using the cxs Watch daemon regardless of how they were uploaded (new in v2)
- PHP upload scripts (via a mod_security or suhosin hook)
- Perl upload scripts (via a mod_security hook)
- CGI upload scripts (via a mod_security hook)
- Any other web script type that utilizes the HTML form ENCTYPE multipart/form-data (via a mod_security hook)
- Pure-ftpd
The active scanning of uploaded files can help prevent exploitation of an account by malware by deleting or moving suspicious files to quarantine before they become active. This includes recent exploits such as the
Dark Mailer spamming script (multiple variants, including obfuscated code regardless of file name) and files uploaded with the
Gumblar Virus, also the recent imgaaa.net defacement scripts. It can also prevent the uploading of PHP and perl shell scripts, commonly used to launch more malicious attacks and for sending spam.
cxs also allows you to perform
on-demand scanning of files, directories and user accounts for suspected exploits, viruses and suspicious resources (files, directories, symlinks, sockets). You can run scans of existing user data to see if exploits have been uploaded in the past or via methods not covered by the active scanning. It has been tuned for performance and scalability.
Exploit detection includes:
- Over 4500 known exploit script fingerprint matches (in addition to ClamAV detection)
- Known viruses via ClamAV
- Regular expression pattern matching to help identify unknown exploits
- Filename matching
- Suspicious file names
- Suspicious file types
- Binary exeuctables
- Custom user specified regular expression patterns
- new in v2: Comprehensive constant scanning of all user data using the cxs Watch daemon - scans all user files as soon as they are modified
- new in v2: Daily check for new Exploit Fingerprints
- ... and more!
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