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Internet Graphics ServerApplication · Sap

CVE-2018-2439

MEDIUM · 5.9 CVSS v3.0 Published 2018-07-10
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

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 · unedited
The SAP Internet Graphics Server (IGS), 7.20, 7.20EXT, 7.45, 7.49, 7.53, has insufficient request validation (for example, where the request is validated for authenticity and validity) and under certain conditions, will process invalid requests. Several areas of the SAP Internet Graphics Server (IGS) did not require sufficient input validation. Namely, the SAP Internet Graphics Server (IGS) HTTP and RFC listener, SAP Internet Graphics Server (IGS) portwatcher when registering a portwatcher to the multiplexer and the SAP Internet Graphics Server (IGS) multiplexer had insufficient input validation and thus allowing a malformed data packet to cause a crash.

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 · high confidence

SAP Internet Graphics Server (IGS) versions 7.20 through 7.53 contain insufficient input validation across multiple components including the HTTP/RFC listener, portwatcher, and multiplexer. This allows remote attackers to send malformed data packets that can crash the service, resulting in denial of service.

MitigationApply the relevant SAP security patch for CVE-2018-2439 to the affected IGS installation. Ensure proper testing in a non-production environment before deploying to production.

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
Internet Graphics ServerApplication
Affected:= 7.20= 7.20ext= 7.45= 7.49= 7.53

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
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify SAP IGS installed version
    Check the SAP IGS version by examining the SAP IGS binary or version file. On Windows, check the IGS executable properties or use SAP LM STRUCTURE command. On Unix, check the igs executable in the SAP install directory (usually $SAPEXECUTE/../igs/). Use command: `saplicense -show` or check SAP META version files.
    Affected if Installed version matches 7.20, 7.20ext, 7.45, 7.49, or 7.53 exactly
  2. Verify HTTP listener is active
    Check if the SAP IGS HTTP listener service is running. On Windows, use Services control panel or command: `sc query IGS`. On Unix, check for igs http process: `ps -ef | grep -i igs`. Also check SAP SM37 job log for IGS HTTP active sessions.
    Affected if HTTP/RFC listener service is running on an affected version (7.20-7.53)
  3. Check portwatcher configuration
    Examine the IGS configuration files for portwatcher settings. Look in the IGS config directory (typically in the SAP profile or usr/sap/SID/SYS/profile). Check for port definitions in igs_config.xml or portwatcher.cfg files.
    Affected if Portwatcher is configured and the IGS version is in the affected range
  4. Confirm multiplexer component status
    Verify if the IGS multiplexer (mux) component is loaded. Check IGS process list and configuration for mux processes. Look for multiplexer entries in SAP IGS trace logs or use transaction SMICM to check IGS HTTP service status.
    Affected if Multiplexer is active and version is 7.20 through 7.53

The environment is affected if SAP IGS version is exactly 7.20, 7.20ext, 7.45, 7.49, or 7.53 AND any of the HTTP/RFC listener, portwatcher, or multiplexer components are enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the relevant SAP security patch for CVE-2018-2439 to the affected IGS installation. Ensure proper testing in a non-production environment before deploying to production.

Fix this in Internet Graphics Server Scoped from the published advisory
  • Consultation4.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,180
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2018-2439 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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