CVE-2019-2956 Denial of service in Oracle Database

Medium 5.7 Published 16 Oct 2019 Updated 1 Oct 2024

A low-privileged attacker can cause a complete denial of service in Oracle Database via the jackson-databind component, requiring user interaction.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2019-2956?

CVE-2019-2956 is a medium-severity denial of service vulnerability in Oracle Database Server, published on 16 Oct 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Vulnerability in the Core RDBMS (jackson-databind) component of Oracle Database Server. Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and 19c. Easily exploitable vulnerability allows low privileged attacker having Create Session privilege with network access via multiple protocols to compromise Core RDBMS (jackson-databind). Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Core RDBMS (jackson-databind). CVSS 3.0 Base Score 5.7 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H).

Which versions are affected by CVE-2019-2956?

It affects 1 product.

Products include Oracle Database Server.

How do I fix CVE-2019-2956?

No fix has been published for CVE-2019-2956 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-2019-2956 being exploited?

There is no known exploitation of CVE-2019-2956 in the wild and no public exploit code.

All Oracle Database Server vulnerabilities

Sources

Also known as GHSA-vp25-cg7m-23wj.