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CVE Record

CVE-2020-2904: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.19 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

MediumCVSS 4.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-2904 is a MySQL Server availability flaw. A highly privileged user who can reach the server over the network may cause MySQL to hang or crash repeatedly. The sources describe denial of service only, not data theft or data modification.

Executive priority

Prioritize remediation for production or customer-facing databases where downtime would affect revenue or operations. Urgency is lower than remote unauthenticated flaws because attacker privileges are required.

Technical view

The vulnerability affects Oracle MySQL Server, component Server: Optimizer, versions 8.0.19 and prior. CVSS 3.0 is 4.9 with network access, low attack complexity, high privileges required, no user interaction, unchanged scope, and high availability impact only.

Likely exposure

Exposure is most relevant where MySQL Server 8.0.19 or earlier remains deployed and reachable by privileged database users over network-accessible protocols.

Exploitation context

The source says exploitation is easy after obtaining high privileges and network access. The bundle does not show CISA KEV listing or other evidence of active exploitation.

Researcher notes

The public bundle does not include a CWE, root-cause detail, proof of concept, or exact fixed version. Analysis should stay anchored to the Oracle CPU and downstream vendor advisories.

Mitigation direction

  • Apply Oracle April 2020 CPU guidance for affected MySQL Server deployments.
  • Apply applicable Ubuntu, Fedora, Gentoo, NetApp, or other vendor security updates.
  • Restrict MySQL network access to trusted administrative sources only.
  • Review privileged database accounts and remove unnecessary elevated access.
  • Check vendor guidance before relying on compensating controls instead of patching.

Validation and detection

  • Inventory MySQL Server versions and flag 8.0.19 or earlier.
  • Confirm installed packages include the relevant Oracle or distribution security update.
  • Verify MySQL is not exposed to untrusted networks.
  • Audit privileged MySQL accounts with network login capability.
  • Review database uptime and logs for unexplained hangs or repeated crashes.
Prepared
Confidence
high
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2020-2904 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
8Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
4.9CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H1.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

4.9Medium
CVSS 3.0 vector shape for CVE-2020-2904Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationMySQL Server8.0.19 and priorListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.