SB2019012106 - Multiple vulnerabilities in Moodle
Published: January 21, 2019 Updated: February 1, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2019-3809)
The disclosed vulnerability allows a remote attacker to perform SSRF attacks.
The vulnerability exists due to insufficient input validation in "/badges/mybackpack.php". A remote attacker can send a specially crafted HTTP request to the "/badges/mybackpack.php" script and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
2) Security restrictions bypass (CVE-ID: CVE-2019-3810)
The vulnerability allows a remote attacker to bypass security restrictions.
The vulnerability exists due to the /userpix/ page did not escape users' full names, which are included as text when hovering over profile images. A remote attacker can bypass security restrictions to conduct further attacks.
3) Cross-site scripting (CVE-ID: CVE-2019-3808)
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.
Remediation
Install update from vendor's website.