SB2021051012 - Multiple vulnerabilities in Ruby on Rails

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2021-22885)

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

The vulnerability exists due to improper input validation in the Action Pack within the "redirect_to" or "polymorphic_url" helper. A remote attacker can gain unauthorized access to sensitive information on the system.

2) Use-after-free (CVE-ID: CVE-2021-22904)

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

The vulnerability exists due to a use-after-free error in the Token Authentication logic in Action Controller. A remote attacker can send a specially crafted request and cause a denial of service condition on the target system. 

Remediation

Install update from vendor's website.

References

• https://seclists.org/oss-sec/2021/q2/101
• https://seclists.org/oss-sec/2021/q2/102