CVE-2020-2511 Denial of service in Oracle Database
A low-privileged attacker can cause a complete denial of service in Oracle Database Core RDBMS via network access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-2511?
CVE-2020-2511 is a high-severity denial of service vulnerability in Oracle Database Server, published on 15 Jan 2020. 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, 18c and 19c. Easily exploitable vulnerability allows low privileged attacker having Create Session privilege with network access via OracleNet to compromise Core RDBMS. While the vulnerability is in Core RDBMS, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Core RDBMS. CVSS 3.0 Base Score 7.7 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).
Which versions are affected by CVE-2020-2511?
It affects 1 product.
Products include Oracle Database Server.
How do I fix CVE-2020-2511?
No fix has been published for CVE-2020-2511 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-2020-2511 being exploited?
There is no known exploitation of CVE-2020-2511 in the wild and no public exploit code.
Other vulnerabilities in Oracle Database Server
Sources
Also known as GHSA-336j-cc8g-x47p.