Security readout for executives and security teams
Plain-English summary
CVE-2020-21890 is a Ghostscript 9.50 buffer overflow triggered by opening a crafted PDF. The reported outcome is denial of service or unspecified impact. Treat it as a document-processing risk where untrusted PDFs reach Ghostscript-backed workflows.
Executive priority
Address this in normal vulnerability remediation cycles, escalating for internet-facing or automated document-processing systems. Business risk is mainly service disruption, with unspecified additional impact not fully characterized in the supplied evidence.
Technical view
The issue is in clj_media_size in devices/gdevclj.c in Artifex Ghostscript 9.50. The CVE describes a buffer overflow reachable through crafted PDF handling. The source bundle provides no CVSS score, CWE, CPE list, or detailed patch version.
Likely exposure
Likely exposure is any server, workstation, print pipeline, or document conversion service that opens untrusted PDFs using Ghostscript 9.50. The bundle does not provide complete affected product metadata.
Exploitation context
No cited source states active exploitation, and the CVE is not listed as KEV. The attack condition described is opening a crafted PDF document; impacts are denial of service or other unspecified effects.
Researcher notes
Evidence is sparse: no CVSS, CWE, CPEs, exploit evidence, or detailed fixed-version data in the bundle. Analysis should anchor on the Ghostscript bug, CVE record, and Debian LTS advisory before making environment-specific claims.
Mitigation direction
- Update Ghostscript through the vendor or distribution package channel; Debian LTS published DLA 3582-1.
- Prioritize systems that process PDFs from external users, email, uploads, or print queues.
- Restrict untrusted PDF processing until vendor guidance is applied.
- Check Artifex and operating-system advisories for exact fixed package versions.
Validation and detection
- Inventory Ghostscript installations and identify any running version 9.50.
- Map applications that call Ghostscript for PDF rendering, conversion, or printing.
- Confirm package versions against Debian LTS or applicable vendor advisories.
- Verify exposed workflows do not process untrusted PDFs with outdated Ghostscript.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-21890 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.ghostscript.com/show_bug.cgi?id=701846CVE reference
- [debian-lts-announce] 20230925 [SECURITY] [DLA 3582-1] ghostscript security updateCVE reference · mailing-list
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.