Some vulnerabilities have been discovered in MyBackup, which can be exploited by malicious users to compromise a vulnerable system and by malicious people to disclose sensitive information.
1) Input passed to the "filename" in down.php is not properly verified before being used to read files. This can be exploited to download arbitrary files from local resources via directory traversal attacks.
2) Input passed to the "main_content" parameter in index.php is not properly verified before being used to include files. This can be exploited to include arbitrary files from local or external resources.
Successful exploitation of this vulnerability requires administrative access to the application, which can be accomplished by exploiting vulnerability #1.
3) Input passed to the "serverfile" parameter in backup_web.php is not properly verified before being used to include files in backups. This can be exploited to disclose the content of arbitrary files from the local system by creating and downloading backups.
The vulnerabilities are confirmed in version 1.4.0. Other versions may also be affected.
Solution: Edit the source code to ensure that input is properly verified.
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Subject: MyBackup Information Disclosure and File Inclusion Vulnerabilities
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