SB2020120613 - Fedora 32 update for drupal8

Description

This security bulletin contains information about 8 secuirty vulnerabilities.

1) 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.

2) 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.

3) 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

4) Improper access control (CVE-ID: CVE-2020-13670)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted information.

The vulnerability exists due to improper access restrictions within the File module when displacing file metadata. A remote attacker can guess file identifier and view potentially sensitive information.

5) Cross-site scripting (CVE-ID: CVE-2020-13669)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the built-in CKEditor image caption functionality. A remote attacker can execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

6) Cross-site scripting (CVE-ID: CVE-2020-13668)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

7) Improper access control (CVE-ID: CVE-2020-13667)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions within the Workspaces module when working with multiple workspaces. A remote attacker can bypass implemented security restrictions and gain unauthorized access to yet not published content.

Successful exploitation of the vulnerability requires that the experimental Workspaces module is installed.

8) Cross-site scripting (CVE-ID: CVE-2020-13666)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in AJAX API, related to JSONP processing. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2020-d50d74d6f2