SB20240827124 - Ubuntu update for drupal7

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Arbitrary file upload (CVE-ID: CVE-2020-13671)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload. A remote attacker can upload a malicious PHP file and execute it on the server.

Additionally, it's recommended that you audit all previously uploaded files to check for malicious extensions. Look specifically for files that include more than one extension, like .php.txt or .html.gif. Pay specific attention to the following file extensions, which should be considered dangerous even when followed by another extension:

• phar
• php
• pl
• py
• cgi
• asp
• js
• html
• htm

2) Deserialization of Untrusted Data (CVE-ID: CVE-2020-28948)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data, related to case sensitivity issues (e.g. "phar:" protocol is blocked, however  "PHAR:" is not). A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

3) Input validation error (CVE-ID: CVE-2020-28949)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper sanitization of the user-supplied input when processing URI handlers in filenames. A remote attacker can pass the "file://" string in the filename and overwrite arbitrary files on the system.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-6981-1