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CVE Record

CVE-2020-4945: IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5 could allow an authenticated user to...

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5 could allow an authenticated user to overwrite arbirary files due to improper group permissions. IBM X-Force ID: 191945.

MediumCVSS 6.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-4945 is an IBM Db2 11.5 issue where a logged-in user could overwrite arbitrary files because of improper group permissions. The main business risk is integrity damage to database hosts or connected systems, not data theft. Public sources do not show active exploitation.

Executive priority

Prioritize remediation during the next security maintenance window for Db2 11.5 systems, sooner for shared or externally reachable database environments. The issue requires authentication but can affect file integrity on important database infrastructure.

Technical view

IBM Db2 for Linux, UNIX and Windows, including Db2 Connect Server 11.5, is affected. The CVSS 3.0 score is 6.5 with network access, low privileges, low complexity, no user interaction, and high integrity impact. IBM X-Force tracks it as ID 191945.

Likely exposure

Exposure is most likely where IBM Db2 11.5 or Db2 Connect Server is deployed and reachable by authenticated users. Risk increases with broad database user access, shared administrative groups, or weak host file-permission hygiene.

Exploitation context

The source bundle lists KEV as false and CVSS exploit maturity as unproven. Treat this as a credible integrity risk for authenticated users, but do not assume confirmed real-world exploitation from the provided evidence.

Researcher notes

The bundle does not name a CWE or provide detailed affected fix levels. Analysis is grounded in the CVE description, CVSS vector, IBM X-Force reference, IBM support advisory, and NetApp advisory listing.

Mitigation direction

  • Review IBM advisory 6466367 for official remediation guidance.
  • Apply the vendor-provided fix or update path for affected Db2 11.5 systems.
  • Review Db2 instance group membership and remove unnecessary privileged users.
  • Restrict network access to Db2 services to trusted administrative and application paths.
  • Check NetApp advisory applicability if NetApp products depend on affected Db2 components.

Validation and detection

  • Inventory Db2 and Db2 Connect Server deployments and confirm exact 11.5 exposure.
  • Compare installed Db2 maintenance level against IBM advisory guidance.
  • Review group permissions for Db2 instance files and administrative paths.
  • Check host integrity monitoring for unexpected file changes near Db2 directories.
  • Document whether any NetApp advisory exposure applies in your environment.
Prepared
Confidence
medium
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-2020-4945 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
6.5 (3.0)
Known Exploited
No
Published

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

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
6.5CVSS 3.0MediumCVSS:3.0/A:N/UI:N/I:H/AC:L/PR:L/AV:N/C:N/S:U/RL:O/E:U/RC:C2.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

6.5Medium
CVSS 3.0 vector shape for CVE-2020-4945Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 and UNIX11.5Listed
Weakness

CWE details

No CWE listed

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