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CVE Record

CVE-2021-29777: IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5, under sp...

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5, under specific circumstance of a table being dropped while being accessed in another session, could allow an authenticated user to cause a denial of srevice IBM X-Force ID: 203031.

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

An authenticated Db2 user may be able to crash or disrupt service when a table is dropped while another session is accessing it. This is an availability issue, not a data theft issue, but it can affect business systems that depend on Db2 uptime.

Executive priority

Prioritize remediation for Db2 systems supporting critical applications, especially where many authenticated users or automation jobs can change schema objects. This is not a critical remote takeover issue, but unplanned database downtime can create material operational impact.

Technical view

CVE-2021-29777 affects IBM Db2 for Linux, UNIX and Windows, including Db2 Connect Server, versions 9.7, 10.1, 10.5, 11.1, and 11.5. The reported condition involves concurrent table access and drop activity. CVSS 3.0 is 5.3 with low privileges required, high attack complexity, no user interaction, and availability impact only.

Likely exposure

Exposure is most likely in environments still running the listed Db2 versions where authenticated database users can perform or influence table drop operations. Systems with tightly controlled DDL permissions and current vendor maintenance are less exposed. The provided sources do not identify additional affected products beyond IBM Db2 and the referenced NetApp advisory.

Exploitation context

The source bundle does not show CISA KEV listing or confirmed active exploitation. IBM X-Force identifies this as a denial-of-service issue with unproven exploit maturity in the CVSS data. Treat it as a credible availability risk requiring authenticated access and specific timing or operational circumstances.

Researcher notes

The public description is narrow and does not provide CWE classification or root-cause detail. Analysis should focus on affected version confirmation, privilege boundaries for DDL operations, and vendor fix status. Avoid assuming exploitability beyond the documented authenticated denial-of-service condition.

Mitigation direction

  • Review IBM advisory 6466373 for exact fixed levels and applicability.
  • Apply IBM-supported updates or fix packs for affected Db2 versions.
  • Restrict table drop and DDL privileges to trusted administrative roles.
  • Review NetApp advisory if Db2 is used in NetApp-supported environments.
  • Monitor Db2 availability and errors around table drop operations.

Validation and detection

  • Inventory Db2 LUW and Db2 Connect Server versions across servers.
  • Confirm whether versions 9.7, 10.1, 10.5, 11.1, or 11.5 are present.
  • Check installed fix packs against IBM's official advisory guidance.
  • Review database roles for unnecessary DROP or schema modification privileges.
  • Validate operational monitoring detects Db2 service disruption events.
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-2021-29777 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.0)
Known Exploited
No
Published

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

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
5.3CVSS 3.0MediumCVSS:3.0/UI:N/A:H/I:N/AV:N/PR:L/AC:H/S:U/C:N/RC:C/E:U/RL:O1.63.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.3Medium
CVSS 3.0 vector shape for CVE-2021-29777Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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.