CVE-2021-35557 Denial of service in Database - Enterprise Edition

What is CVE-2021-35557?

CVE-2021-35557 is a medium-severity denial of service vulnerability in Oracle Database, published on 20 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Vulnerability in the Core RDBMS component of Oracle Database Server. Supported versions that are affected are 12.1.0.2, 12.2.0.1, 19c and 21c. Easily exploitable vulnerability allows low privileged attacker having Create Table privilege with network access via Oracle Net to compromise Core RDBMS. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Core RDBMS. CVSS 3.1 Base Score 4.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).

Which versions are affected by CVE-2021-35557?

It affects 1 product.

Products include Oracle Database.

How do I fix CVE-2021-35557?

No fix has been published for CVE-2021-35557 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-35557 being exploited?

There is no known exploitation of CVE-2021-35557 in the wild and no public exploit code.

Other vulnerabilities in Oracle Database

• CVE-2017-10202 Privilege escalation in Oracle Database Critical 9.9
• CVE-2017-3310 Privilege escalation in Oracle Database Critical 9.0
• CVE-2016-3609 Other in n/a Critical 9.0
• CVE-2016-3454 Other in n/a Critical 9.0
• CVE-2022-21510 Privilege escalation in Database - Enterprise Edition High 8.8

All Oracle Database vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-qvmf-39xh-6qw2.