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CVE Record

CVE-2018-19476: psi/zicc.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access restriction...

psi/zicc.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access restrictions because of a setcolorspace type confusion.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-19476 is a Ghostscript flaw before version 9.26. A remote attacker could bypass intended access restrictions through a setcolorspace type confusion. Business risk is highest where servers automatically process untrusted PostScript or PDF content using vulnerable Ghostscript packages.

Executive priority

Prioritize remediation where Ghostscript handles external documents automatically. The issue is old and patchable, but document-processing services can create broad exposure because exploitation can occur through submitted files.

Technical view

The issue is in Ghostscript psi/zicc.c before 9.26. Public CVE data describes a setcolorspace type confusion that bypasses intended access restrictions. Vendor advisories from Debian, Ubuntu, and Red Hat published security updates, and Ghostscript 9.26 history is referenced as the upstream fixed release context.

Likely exposure

Exposure is likely on Linux systems or applications running Ghostscript before 9.26, especially automated document, print, or conversion workflows that process files from users or external parties.

Exploitation context

The supplied bundle does not show CISA KEV listing or cited evidence of active exploitation. The realistic risk context is attacker-supplied document processing by vulnerable Ghostscript, not ordinary browsing unless Ghostscript is invoked downstream.

Researcher notes

Evidence supports an access-restriction bypass caused by type confusion in setcolorspace. The bundle lacks CVSS, CWE, proof of active exploitation, and complete affected-product enumeration, so validation should focus on confirmed Ghostscript versions and distro advisory status.

Mitigation direction

  • Update Ghostscript to version 9.26 or vendor-fixed packages.
  • Apply Debian DSA-4346, Ubuntu USN-3831-1, or Red Hat RHSA-2019:0229 where applicable.
  • Avoid processing untrusted PostScript or PDF files on vulnerable hosts.
  • Check current vendor guidance for platform-specific backports and package names.

Validation and detection

  • Inventory Ghostscript versions across servers, containers, and build images.
  • Confirm installed packages include the relevant vendor security update.
  • Identify workflows that pass user-supplied documents to Ghostscript.
  • Review logs and job history for unexpected document conversion failures or access-restriction errors.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2018-19476 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
9Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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