SB2021042101 - Multiple vulnerabilities in Oracle Application Express

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2020-11023)

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 passing <option> elements to jQuery’s DOM manipulation methods. A remote attacker can execute arbitrary JavaScript 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) Resource exhaustion (CVE-ID: CVE-2020-7760)

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

The vulnerability exists due to application does not properly control consumption of internal resources when processing regular expression. A remote attacker can trigger resource exhaustion and perform a regular expression denial of service (ReDoS) attack.

Remediation

Install update from vendor's website.

References

• https://www.oracle.com/security-alerts/cpuapr2021.html?534662
• https://www.oracle.com/security-alerts/cpuapr2021.html