CVE-2023-50734
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 · uneditedA buffer overflow vulnerability has been identified in PostScript interpreter in various Lexmark devices. The vulnerability can be leveraged by an attacker to execute arbitrary code.
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 confidenceA buffer overflow vulnerability exists in the PostScript interpreter component of multiple Lexmark printer devices. By sending specially crafted PostScript content, an attacker can overflow a buffer and achieve arbitrary code execution with elevated privileges on the affected device.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/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 Lexmark printer devices on the networkUse network scanning tools (nmap, asset discovery) or check DHCP logs/DNS records to locate Lexmark printers by MAC vendor OUI or SNMP sysObjectIDAffected if Lexmark printer devices are found on the network
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Determine the installed firmware versionAccess the printer web interface (http://<printer-ip>) and navigate to Settings > Firmware, or use SNMP GET on .1.3.6.1.2.1.47.1.1.1.1.9.1, or run 'lpinfo -v' via CUPSAffected if The firmware version cannot be verified as patched against Lexmark security advisories for CVE-2023-50734
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Verify PostScript interpreter is enabledCheck printer settings via web interface under Options or Language settings, or query SNMP oid .1.3.6.1.4.1.641.1.1.1.1.2 for PostScript/PSM statusAffected if PostScript processing is enabled and the firmware version is unpatched
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Assess network accessibility of printer management interfaceCheck if ports 80/443/631/9100 are exposed to untrusted networks, or use nmap -p 80,443,631,9100 <printer-ip> to test accessibilityAffected if The printer management interface is accessible from untrusted network segments without ACLs
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Check for signs of exploitation or abnormal behaviorReview printer system logs via web interface or syslog export for crash dumps, PostScript job errors, or unexpected processesAffected if Unexpected crashes, job anomalies, or unauthorized configuration changes are logged after the CVE disclosure date
A user is affected if Lexmark printer devices with unpatched firmware are present AND PostScript processing is enabled, making them reachable either locally or remotely.
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 available Lexmark firmware updates addressing this vulnerability. If no patch is available, restrict network access to printer management interfaces and disable PostScript processing if not required.
- Consultation6.0 h
- Implementation12.0 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-2023-50734 — 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-2023-50734 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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