LiveActive security incident?Get immediate response
CVE Record

CVE-2021-29702: Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.1.4 and 11.5.5 is vulnerable to a denial o...

Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.1.4 and 11.5.5 is vulnerable to a denial of service as the server terminates abnormally when executing a specially crafted SELECT statement. IBM X-Force ID: 200658.

HighCVSS 7.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-29702 is a denial-of-service flaw in IBM Db2 for Linux, UNIX and Windows. A specially crafted SELECT statement can make the Db2 server terminate abnormally, disrupting database availability. The source bundle identifies affected versions 11.1.4 and 11.5.5, including Db2 Connect Server.

Executive priority

Treat this as a high-priority availability risk for business-critical Db2 environments. It does not indicate data theft in the provided sources, but it can disrupt database-backed operations. Patch or follow IBM guidance promptly where affected versions are present.

Technical view

The vulnerability is in IBM Db2 LUW, including Db2 Connect Server, versions 11.1.4 and 11.5.5. CVSS 3.0 is 7.5 with network access, low complexity, no privileges, no user interaction, unchanged scope, and high availability impact. Confidentiality and integrity impacts are listed as none.

Likely exposure

Exposure is most likely where affected Db2 servers or Db2 Connect Server instances are reachable over a network, especially from untrusted or broad internal networks. The bundle does not name other affected IBM versions beyond 11.1.4 and 11.5.5.

Exploitation context

The bundle does not indicate active exploitation, and KEV is false. The CVSS data lists exploit maturity as unproven. The issue is still business-relevant because unauthenticated network access and low attack complexity can translate into database outages if an affected service is reachable.

Researcher notes

Do not assume broader product impact beyond the listed Db2 LUW and Db2 Connect Server versions. The public description attributes the crash to a specially crafted SELECT statement, but the source bundle does not provide safe validation detail or a complete fixed-version matrix.

Mitigation direction

  • Review IBM advisory guidance for CVE-2021-29702 and X-Force ID 200658.
  • Apply IBM's official remediation for affected Db2 11.1.4 and 11.5.5 installations.
  • Check NetApp advisory guidance if NetApp products or integrations depend on affected Db2 components.
  • Limit network reachability to Db2 services while remediation is pending.
  • Prioritize availability monitoring for affected database services until fixed.

Validation and detection

  • Inventory Db2 LUW and Db2 Connect Server deployments and record exact versions.
  • Identify any instances running Db2 11.1.4 or 11.5.5.
  • Confirm remediation status against the IBM support advisory for CVE-2021-29702.
  • Review database service logs for unexplained abnormal terminations.
  • Verify whether any NetApp advisory exposure applies in your environment.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2021-29702 mapping review

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

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/C:N/PR:N/UI:N/S:U/A:H/AC:L/I:N/RL:O/RC:C/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
7.5CVSS 3.0HighCVSS:3.0/AV:N/C:N/PR:N/UI:N/S:U/A:H/AC:L/I:N/RL:O/RC:C/E:U3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

7.5High
CVSS 3.0 vector shape for CVE-2021-29702Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/C:N/PR:N/UI:N/S:U/A:H/AC:L/I:N/RL:O/RC:C/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 Windows11.1.4, 11.5.5Listed
Weakness

CWE details

No CWE listed

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