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CVE Record

CVE-2020-4976: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could all...

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow a local user to read and write specific files due to weak file permissions. IBM X-Force ID: 192469.

MediumCVSS 5.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-4976 is a weak file-permissions issue in IBM DB2 for Linux, UNIX and Windows, including DB2 Connect Server. A local user could read and write specific files. This is not described as remote exploitation, but it can matter where DB2 hosts have shared shell, application, or operational access.

Executive priority

Handle in normal vulnerability remediation cycles, faster for shared DB2 servers or systems storing regulated data. The issue is local and medium severity, but database file read/write exposure can create audit, integrity, and confidentiality concerns.

Technical view

Affected DB2 LUW versions 9.7, 10.1, 10.5, 11.1, and 11.5 may expose specific files with permissions that allow local read and write access. The CVSS vector is local, low complexity, no user interaction, with low confidentiality and integrity impact and no availability impact.

Likely exposure

Exposure is most likely on servers running the listed DB2 versions where non-administrative local users, application accounts, or support users can access the operating system. The bundle does not identify direct network exploitation or specific affected NetApp products.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. The CVSS exploit-code maturity is unproven. Treat this as a local privilege-boundary and data-integrity risk, especially on shared DB2 infrastructure.

Researcher notes

Do not assume remote reachability from the supplied data. The key validation questions are installed DB2 version, local account exposure, and vendor-fixed maintenance level. Evidence is limited to IBM, X-Force, CVE records, and a NetApp advisory reference.

Mitigation direction

  • Check IBM advisory 6427859 for fixed levels or vendor-recommended remediation.
  • Prioritize DB2 hosts with shared local access or sensitive database workloads.
  • Review local OS account access to DB2 servers and remove unnecessary users.
  • Check NetApp advisory if your environment uses NetApp products with DB2 dependencies.

Validation and detection

  • Inventory DB2 LUW and DB2 Connect Server versions across all hosts.
  • Confirm whether versions 9.7, 10.1, 10.5, 11.1, or 11.5 are present.
  • Review IBM guidance for vulnerable file locations and corrected permissions.
  • Verify local user access paths to affected DB2 servers.
  • Document compensating controls if immediate remediation is unavailable.
Prepared
Confidence
high
Sources
5

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-2020-4976 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.1 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/UI:N/AC:L/AV:L/PR:N/C:L/A:N/I:L/S:U/RC:C/RL:O/E:U

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
4Source 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
5.1CVSS 3.0MediumCVSS:3.0/UI:N/AC:L/AV:L/PR:N/C:L/A:N/I:L/S:U/RC:C/RL:O/E:U2.52.5Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.1Medium
CVSS 3.0 vector shape for CVE-2020-4976Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/UI:N/AC:L/AV:L/PR:N/C:L/A:N/I:L/S:U/RC:C/RL:O/E:U

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
IBMDB2 for Linux, UNIX and Windows10.5, 10.1, 9.7, 11.1, 11.5Listed
Weakness

CWE details

No CWE listed

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