SB2023122113 - Multiple vulnerabilities in Moodle

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Main Vulnerability Database SB2023122113

SB2023122113 - Multiple vulnerabilities in Moodle

Published: December 21, 2023

Security Bulletin ID SB2023122113
Severity
Medium
Patch available
YES
Number of vulnerabilities 10
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 60% Low 40%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 10 secuirty vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2023-6670)

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 "classname" parameter on the admin ad-hoc tasks page. 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) Code Injection (CVE-ID: CVE-2023-6661)

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

The vulnerability exists due to improper input validation in logstore. A remote user can send a specially crafted request 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-2023-6662)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the URL downloader. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.


4) Code Injection (CVE-ID: CVE-2023-6663)

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

The vulnerability exists due to improper input validation in course blocks. A remote user can send a specially crafted request and execute arbitrary code on the target system.

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


5) Information disclosure (CVE-ID: CVE-2023-6664)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to separate groups mode restrictions are not honoured in the Logs and Live logs course reports. A remote user can display users from other groups.


6) Information disclosure (CVE-ID: CVE-2023-6667)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to separate groups mode restrictions are not honoured in survey response reports. A remote user can display users from other groups.


7) Stored cross-site scripting (CVE-ID: CVE-2023-6665)

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 grader report within user ID number. A remote attacker can inject 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.


8) Cross-site scripting (CVE-ID: CVE-2023-6666)

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 grader report search. 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.


9) Information disclosure (CVE-ID: CVE-2023-6668)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to insufficient capability checks. A remote user can view the recipients of badges.


10) Cross-site scripting (CVE-ID: CVE-2023-6669)

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 when manually running a task in the admin UI. 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