SB2018052216 - Multiple vulnerabilities in Joomla!

Security Bulletin ID SB2018052216

Severity

Low

Patch available

YES

Number of vulnerabilities 9

Exploitation vector Remote access

Highest impact Code execution

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 9 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2018-6378)

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 passed via file and folder names in media manager. 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.

2) Improper access control (CVE-ID: CVE-2018-11323)

The vulnerability allows a remote attacker to violate security restrictions.

The vulnerability exists due to improper validation of permissions within the application. A remote authenticated attacker can modify the access levels of user groups with higher permissions.

3) Unrestricted upload of file with dangerous type (CVE-ID: CVE-2018-11322)

The vulnerability allows a remote attacker to upload dangerous files on the server.

The vulnerability exists due to the web application allows uploading of PHAR files that can be treated in certain web server configuration as PHP executable files. A remote attacker can upload a PHAR file and execute arbitrary PHP code on the target system.

4) Information disclosure (CVE-ID: CVE-2018-11327)

The vulnerability allows a remote attacker to view unpublished tags.

The vulnerability exists due to web application allows a remote attacker to see names of tags that were not published yet or have restricted access.

5) Information disclosure (CVE-ID: CVE-2018-11325)

The vulnerability allows a local user to gain access to administrator's password.

The vulnerability exists due to the web install application automatically fills-in password fields after either a form validation error or navigating to a previous install step, and displays the plain text password for the administrator account at the confirmation screen.

6) Cross-site scripting (CVE-ID: CVE-2018-11326)

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) Code injection (CVE-ID: CVE-2018-11321)

The vulnerability allows a remote authenticated attacker to inject and execute arbitrary code.

The vulnerability exists due to improper validation of user-supplied data in com_fields core component. A remote authenticated attacker with privileges to create custom fields can inject an unvalidated option.

8) Race condition (CVE-ID: CVE-2018-11324)

The vulnerability allows a remote attacker to perform session fixation attacks.

The vulnerability exists due to a race condition, related to background process when destroying user's session. A remote attacker can create a race condition that and re-use victim's session identifier.

9) Cross-site scripting (CVE-ID: CVE-2018-11328)

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 during user redirect with a URI containing a username and password when the Location: header cannot be used. 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://developer.joomla.org/security-centre.html