CVE-2023-32331
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 Connect:Express for UNIX 1.5.0 is vulnerable to a buffer overflow that could allow a remote attacker to cause a denial of service through its browser UI. IBM X-Force ID: 254979.
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 analysis · moderate confidenceIBM Connect:Express for UNIX version 1.5.0 contains a buffer overflow vulnerability in its web-based browser UI component. A remote attacker can trigger this flaw by sending specially crafted requests through the UI, causing the application to crash and resulting in a denial of service condition.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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= express_for_unixCVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed IBM Connect:Express for UNIX versionRun the command to display the product version, such as 'lsitab -a | grep connect' or check the installation directory for version files. Typical paths include /opt/ibm/ConnectExpress or /usr/local/ConnectExpressAffected if The installed version is 1.5.0 specifically
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Verify the web-based browser UI component is enabledCheck if the web UI service is running. Look for processes related to the UI component, typically on port 8080 or 8443. Commands like 'ps -ef | grep -i connect' or 'netstat -anp | grep LISTEN' can show active UI listenersAffected if The web UI component is active and listening for connections
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Inspect application logs for crash eventsReview logs in the Connect:Express log directory, commonly found under /opt/ibm/ConnectExpress/logs or /var/log/ConnectExpress. Look for sudden application crashes, segfaults, or memory errors occurring in the UI componentAffected if Recent crashes or memory errors are logged, especially those originating from UI request handling
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Check network exposure of the web UIVerify which network interfaces the web UI binds to. Use 'netstat -tulnp' or 'ss -tulnp' to determine if the UI listens on all interfaces (0.0.0.0) versus localhost onlyAffected if The web UI is bound to publicly accessible network interfaces rather than localhost only
If IBM Connect:Express for UNIX version 1.5.0 is installed with the web-based browser UI component enabled and accessible, the environment is affected by this buffer overflow vulnerability.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor dataContact IBM support to obtain the applicable patch or upgrade path for this vulnerability. Until a fix is available, consider network segmentation to limit exposure of the browser UI to untrusted networks.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-32331 — 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-2023-32331 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
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