CVE-2012-5048
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 · uneditedAPIFTP Server in Optimalog Optima PLC 1.5.2 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted packet.
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 confidenceThe APIFTP Server component in Optimalog Optima PLC versions 1.5.2 and earlier contains a NULL pointer dereference vulnerability when processing malformed network packets, causing the service to crash and resulting in denial of service. The vulnerability is remotely exploitable without authentication via specially crafted packets sent to the FTP server service.
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<= 1.5.2= 1.4.9= 1.4.10= 1.5.0= 1.5.1CVSS 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
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 if Optimalog Optima PLC is running in the environmentReview installed software, running services, or network scans to locate any instance of Optimalog Optima PLC. Check for services listening on FTP ports (21/tcp) that may correspond to the APIFTP Server component.Affected if Optimalog Optima PLC software is present on any system in the environment
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Determine the installed version of Optima PLCLocate the software version through the PLC management interface, program files directory, or system inventory. Compare the discovered version against the affected ranges: <= 1.5.2, or specifically 1.4.9, 1.4.10, 1.5.0, or 1.5.1.Affected if The installed version is 1.5.2 or earlier, specifically including any of 1.4.9, 1.4.10, 1.5.0, 1.5.1, or 1.5.2
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Verify if the APIFTP Server component is enabledAccess the PLC configuration or management interface and check whether the APIFTP Server service or module is activated. This component handles FTP connections and is required for the vulnerability to be exploitable.Affected if The APIFTP Server component is running or enabled on the PLC device
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Assess network accessibility of the FTP serviceIdentify which network interfaces and IP addresses the FTP service is bound to. Determine if the FTP port (21/tcp) is exposed to untrusted networks, including the internet, or accessible from other VLANs/segments beyond the PLC operations network.Affected if The FTP service is accessible from networks beyond the trusted PLC management network, particularly from untrusted or external networks
A system is affected if it runs Optimalog Optima PLC version 1.5.2 or earlier with the APIFTP Server component enabled and exposed to network traffic.
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 dataApply vendor-supplied updates for Optimalog Optima PLC to patch the APIFTP Server vulnerability. If no patch is available, network segmentation and firewall rules should restrict access to the PLC management interfaces to minimize exposure.
- Consultation4.0 h
- Implementation2.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-5048 — 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-2012-5048 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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