Security readout for executives and security teams
Plain-English summary
This flaw lets a highly privileged Db2 administrator reach beyond expected database boundaries and read or modify files. It is serious because it can turn an already powerful database role into broader system and cross-database access. It is not described as a drive-by attack.
Executive priority
Prioritize remediation where Db2 stores sensitive data or where DBADM access is assigned broadly. The privilege requirement lowers likelihood, but successful abuse could undermine database separation and file integrity.
Technical view
CVE-2021-29678 affects IBM Db2 for Linux, UNIX and Windows, including Db2 Connect Server, versions 9.7, 10.1, 10.5, 11.1, and 11.5. A user with DBADM authority could access other databases and read or modify files. CVSS is 8.7 with high confidentiality and integrity impact, high privileges required, and changed scope.
Likely exposure
Organizations running the listed Db2 LUW or Db2 Connect Server versions are potentially exposed, especially where DBADM roles are broad, shared, or assigned to service accounts. Exposure depends on actual product version, privilege assignments, and network reachability.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The CVSS vector marks exploit maturity as unproven and remediation level as official fix. Treat this as a high-impact insider or compromised-admin risk, not proven mass exploitation.
Researcher notes
Key evidence is limited to the CVE description, CVSS vector, IBM advisory, IBM X-Force entry, and NetApp advisory reference. No CWE is listed. Do not assume affected builds beyond the named major versions without checking IBM guidance.
Mitigation direction
- Apply IBM-recommended fixes or fix packs for affected Db2 versions from the vendor advisory.
- Restrict DBADM authority to documented administrators and remove unnecessary grants.
- Segment Db2 instances and limit network access to approved management paths.
- Review service accounts for excessive Db2 administrative privileges.
- Check NetApp guidance if Db2 is present in dependent NetApp environments.
Validation and detection
- Inventory Db2 LUW and Db2 Connect Server versions across servers.
- Identify accounts and groups holding DBADM authority on affected instances.
- Confirm installed fixes against IBM advisory guidance for CVE-2021-29678.
- Review database and host logs for unusual file access or cross-database activity.
- Verify compensating network controls around Db2 listener exposure.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-2021-29678 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.7 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/C:H/PR:H/S:C/AV:N/I:H/AC:L/UI:N/A:N/RC:C/E:U/RL:O
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.0/C:H/PR:H/S:C/AV:N/I:H/AC:L/UI:N/A:N/RC:C/E:U/RL:O2.35.8Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.7HighVector: CVSS:3.0/C:H/PR:H/S:C/AV:N/I:H/AC:L/UI:N/A:N/RC:C/E:U/RL:O
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/6523806CVE reference · x_refsource_CONFIRM
- ibm-db2-cve202129678-access-control (199914)CVE reference · vdb-entry, x_refsource_XF
- https://security.netapp.com/advisory/ntap-20220114-0002/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.