Security readout for executives and security teams
Plain-English summary
This is a denial-of-service issue in Oracle MySQL Server’s optimizer. An attacker who already has high database privileges and network access could cause MySQL Server to hang or crash repeatedly. The supplied sources do not indicate data theft or modification, but outages can affect applications depending on vulnerable MySQL instances.
Executive priority
Treat as a moderate availability risk. Prioritize patching systems that support customer-facing or revenue-critical applications, especially where many users or services have elevated MySQL privileges. The supplied evidence does not support emergency response for active exploitation.
Technical view
CVE-2020-2928 affects Oracle MySQL Server 8.0.19 and prior, component Server: Optimizer. CVSS 3.0 is 4.9 with network attack vector, low complexity, high privileges required, no user interaction, unchanged scope, and high availability impact only. Successful exploitation can cause complete denial of service through hangs or repeatable crashes.
Likely exposure
Exposure is most relevant where MySQL Server 8.0.19 or earlier is reachable over network protocols by highly privileged database users. Internet exposure alone is not enough according to the CVSS privileges requirement, but overly broad admin access increases operational risk.
Exploitation context
The bundle does not show CISA KEV listing or cited active exploitation. Oracle describes the issue as easily exploitable, but requiring a high privileged attacker with network access via multiple protocols. Impact is availability loss, not confidentiality or integrity compromise.
Researcher notes
No CWE is provided in the bundle. The key constraint is PR:H, which materially lowers broad exploitability. Testing should focus on version and privilege exposure, not exploit reproduction. The public sources establish affected versions and DoS impact but do not provide detailed root cause or standalone workaround evidence.
Mitigation direction
- Identify MySQL Server deployments at version 8.0.19 or earlier.
- Apply Oracle CPU or distribution vendor updates applicable to MySQL Server.
- Limit network access to MySQL administration interfaces and trusted application paths.
- Review and reduce high-privilege MySQL accounts where possible.
- Monitor MySQL service health for repeated crashes or unexplained hangs.
Validation and detection
- Inventory MySQL Server versions across production, staging, and managed images.
- Confirm patch status against Oracle, Ubuntu, Fedora, Gentoo, or NetApp advisories as applicable.
- Review firewall and security group rules for MySQL network exposure.
- Audit high-privilege database accounts and recent administrative access.
- Check database and service logs for recurring crashes or hang symptoms.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-2928 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H1.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.9MediumVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpuapr2020.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200416-0003/CVE reference · x_refsource_CONFIRM
- USN-4350-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- FEDORA-2020-20ac7c92a1CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-136dc82437CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-261c9ddd7cCVE reference · vendor-advisory, x_refsource_FEDORA
- GLSA-202105-27CVE reference · vendor-advisory, x_refsource_GENTOO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.