Oracle April 2021 Critical Patch Update Addresses 257 CVEs including ‘Zerologon’ (CVE-2020-1472)

Oracle addresses over 250 CVEs in its second quarterly update of 2021 with 390 patches, including 34 critical updates.

Background

On April 20, Oracle released its Critical Patch Update (CPU) for April 2021, the second quarterly update of the year. This CPU update contains fixes for 257 CVEs in 390 security updates across 32 Oracle product families. Out of the 390 security updates published this quarter, over 50% were assigned a high severity. Critical vulnerabilities only accounted for eight percent of the security updates patched this quarter.

Analysis

This quarter’s update includes fixes for 34 critical issues across 30 CVEs. The Oracle E-Business Suite product family contained the highest number of patches at 70, representing just shy of 18% of the patches from this quarter. Of those 70 patches, 22 issues are remotely exploitable without authentication.

As we’ve seen with past CPUs, Oracle Fusion Middleware continues to take the lead in the number of vulnerabilities which can be exploited by unauthenticated attackers, as 36 of the 45 patches meet this criteria. A full breakdown of the patches can be seen in the table below:

Five 10.0 CVSSv3 Scoring Vulnerabilities

This quarter Oracle includes patches to address five CVEs, with the highest severity CVSSv3 score of 10.0. This includes the critical Zerologon vulnerability (CVE-2020-1472). These flaws could be exploited by unauthenticated, remote attackers and should be prioritized for patching. The table below outlines each affected Product and CVE:

Proof of concept

At the time this blog was written, several of the highest severity (CVSSv3 9.8 and 10.0) CVE’s have published proof-of-concept (PoC) scripts. While all of these have not been tested or verified by Tenable, we would recommend taking action to patch the flaws as soon as possible. The following table lists some of the CVEs that currently have published PoCs:

Solution

Customers are advised to apply all relevant patches in this quarter’s CPU. Please refer to the April 2021 advisory for full details.

Identifying affected systems

A list of Tenable plugins to identify these vulnerabilities will appear here as they’re released.

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