CVE-2023-27859
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIBM Db2 10.1, 10.5, and 11.1 could allow a remote user to execute arbitrary code caused by installing like named jar files across multiple databases. A user could exploit this by installing a malicious jar file that overwrites the existing like named jar file in another database. IBM X-Force ID: 249205.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysisThe program loads a library or executable from a location an attacker can influence — a writable directory early in the search order — so a malicious file is loaded with the application's privileges. On Windows this is the classic DLL-hijack. Remediation is loading only from fully-qualified trusted paths and controlling the search order explicitly.
General guidance for the uncontrolled search path (dll hijack) class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 10.5.0.0, <= 10.5.0.11>= 11.1.0.0, <= 11.1.4.7>= 11.5, <= 11.5.9CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedUpgrade to the latest available Db2 release in your version branch (e.g., 10.5.0.11, 11.1.4.7, or 11.5.9) or consider upgrading to a newer major version if available
- 1. Identify the current IBM Db2 version by running 'db2level' command or checking Db2diag log
- 2. Navigate to the IBM support page at https://www.ibm.com/support/pages/node/7105503 to obtain the appropriate security patch for your specific Db2 version and platform
- 3. Download the security patch for your Db2 version (10.5.0.x, 11.1.0.x through 11.1.4.7, or 11.5.x through 11.5.9)
- 4. Schedule a maintenance window and stop all Db2 instances and dependent services
- 5. Apply the security patch following IBM's installation instructions from the support bulletin
- 6. After patching, restart Db2 instances and verify the version has been updated
- 7. Test critical database operations to ensure stability after the patch
Generated from the published advisory — verify against the referenced sources before acting.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-27859 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-27859 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data