Security readout for executives and security teams
Plain-English summary
CVE-2020-21683 is a denial-of-service issue in fig2dev 3.2.7b. A specially crafted xfig file can crash the program when it is converted to pstricks format. Business urgency depends on whether the organization processes untrusted diagram files in automated workflows.
Executive priority
Prioritize if fig2dev is exposed through automated handling of external files. If it is only used manually on trusted inputs, urgency is lower, but inventory and update tracking are still warranted.
Technical view
The CVE describes a global buffer overflow in shade_or_tint_name_after_declare_color in genpstricks.c. The vulnerable path is xfig-to-pstricks conversion in fig2dev 3.2.7b. Public data does not provide CVSS, CWE, distribution impact, or a named fixed version.
Likely exposure
Exposure is most likely in document conversion, publishing, CI, or web upload systems that invoke fig2dev 3.2.7b on untrusted xfig input. The source bundle does not identify affected operating-system packages or downstream products.
Exploitation context
The public description supports denial of service through malicious input during conversion. KEV is false, and the provided sources do not state active exploitation, remote code execution, or privilege escalation.
Researcher notes
Evidence is sparse: the CVE description and referenced ticket identify the function, file, version, and DoS impact, but not CVSS, exploit maturity, fixed release, or affected distributions. Avoid broad product claims without package-specific confirmation.
Mitigation direction
- Inventory fig2dev and related xfig/transfig tooling across servers, CI, and document pipelines.
- Avoid processing untrusted xfig files to pstricks format until vendor guidance is reviewed.
- Run conversion jobs with isolation, least privilege, and resource limits.
- Check the SourceForge ticket and package maintainers for patched versions or official mitigations.
Validation and detection
- Confirm whether fig2dev 3.2.7b is installed or bundled in conversion workflows.
- Identify any user-upload or email-ingestion path that can trigger xfig-to-pstricks conversion.
- Review conversion logs for crashes tied to xfig or pstricks processing.
- Verify any updated package in staging using representative trusted conversion files.
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-2020-21683 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
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://sourceforge.net/p/mcj/tickets/77/CVE reference · x_refsource_MISC
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.