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CVE Record

CVE-2020-2898: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Charsets).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Charsets). The supported version that is affected is 8.0.19. 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-2020-2898 can let a highly privileged network attacker crash or hang MySQL Server 8.0.19. The business risk is service disruption, not data theft or tampering based on the supplied CVSS vector. Priority depends on whether affected MySQL instances support critical services.

Executive priority

Treat as a scheduled but important availability fix. Escalate priority for internet-adjacent, shared, or business-critical MySQL 8.0.19 systems because outage impact can exceed the medium CVSS score.

Technical view

Oracle describes this as a MySQL Server vulnerability in the Server: Charsets component. It is network reachable, low complexity, requires high privileges, and needs no user interaction. Successful exploitation can cause a complete denial of service through a hang or frequently repeatable crash.

Likely exposure

Exposure is limited to Oracle MySQL Server 8.0.19 according to the supplied affected list. Risk is highest where MySQL is reachable over the network by privileged users or service accounts and backs production workloads.

Exploitation context

The source bundle does not indicate CISA KEV listing or active exploitation. The high-privilege requirement reduces broad external attack likelihood, but an insider, compromised admin account, or trusted application path could still trigger an outage.

Researcher notes

Evidence supports denial of service only: no confidentiality or integrity impact is stated. The affected scope in the bundle is narrow, but downstream advisories show ecosystem packaging relevance. Fixed versions are not included in the bundle, so use vendor advisories for exact remediation targets.

Mitigation direction

  • Apply Oracle April 2020 CPU guidance or supported distribution security updates after testing.
  • Confirm the corrected target version from Oracle, Ubuntu, Fedora, Gentoo, or relevant vendor guidance.
  • Restrict MySQL network access to trusted hosts and required service paths.
  • Review privileged MySQL accounts and remove unnecessary network-capable access.
  • Monitor affected databases for repeated hangs, crashes, and unexplained restarts until remediated.

Validation and detection

  • Inventory MySQL Server versions and identify any 8.0.19 deployments.
  • Check whether affected instances are reachable over network protocols by privileged users.
  • Verify vendor advisory applicability for Oracle packages, Linux distribution packages, or bundled third-party products.
  • Confirm patch status through package inventory, asset records, or database version reporting.
  • Review database logs and service monitoring for repeated crash or hang patterns.
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-2020-2898 mapping review

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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-2020-2898Attack 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 Server8.0.19Listed
Weakness

CWE details

No CWE listed

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