2020-28052 | Oracle WebCenter Portal Bouncy Castle Java Library Remote Code Execution

By Max On Jul 24, 2021

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.4	$25k-$100k	0.08

A vulnerability was found in Oracle WebCenter Portal 11.1.1.9.0/12.2.1.3.0/12.2.1.4.0 (Content Management System) and classified as very critical. This issue affects some unknown processing of the component Bouncy Castle Java Library. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Legion of the Bouncy Castle BC Java 1.65 and 1.66. The OpenBSDBCrypt.checkPassword utility method compared incorrect data when checking the password, allowing incorrect passwords to indicate they were matching with previously hashed ones that were different.

The weakness was disclosed 07/20/2021 as Oracle Critical Patch Update Advisory – July 2021. It is possible to read the advisory at oracle.com. The identification of this vulnerability is CVE-2020-28052 since 11/02/2020. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $25k-$100k at the moment (estimation calculated on 07/24/2021).

We expect the 0-day to have been worth approximately $100k and more.

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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