LiveActive security incident?Get immediate response
CVE Record

CVE-2019-20094: An issue was discovered in libsixel 1.8.4.

An issue was discovered in libsixel 1.8.4. There is a heap-based buffer overflow in the function gif_init_frame at fromgif.c.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2019-20094 is a reported heap-based buffer overflow in libsixel 1.8.4 when initializing GIF frames. Business risk depends on whether your software uses libsixel to process GIF content, especially files supplied by users or external parties. The provided sources do not include a CVSS score, confirmed exploitation, or a named fixed release.

Executive priority

Treat this as an inventory-driven risk item. Prioritize if libsixel handles external GIF files in production or customer-facing workflows. Deprioritize only after confirming the affected version is absent or unreachable.

Technical view

The issue is in libsixel 1.8.4, function gif_init_frame in fromgif.c. The source bundle only states heap-based buffer overflow and does not provide CVSS, CWE mapping, exploitability details, or remediation details. Exposure analysis should focus on code paths that invoke libsixel GIF parsing or conversion on untrusted input.

Likely exposure

Organizations may be exposed if they package, link, or run libsixel 1.8.4 in image conversion, terminal graphics, preview, or processing workflows that accept GIF files. The source bundle does not identify downstream products or package ecosystems, so exposure must be confirmed by inventory rather than assumed.

Exploitation context

No active exploitation is stated in the provided sources, and the CVE is not marked as CISA KEV. The issue class can be security-relevant when attackers can supply GIF input, but the bundle does not establish practical impact, prerequisites, or exploit maturity.

Researcher notes

Evidence is sparse: the bundle identifies the vulnerable function and version but omits CVSS, CWE, patch status, and proof of exploitation. Researchers should avoid overclaiming impact and should anchor validation on reachability of GIF parsing in libsixel 1.8.4.

Mitigation direction

  • Inventory systems and applications for libsixel 1.8.4 usage.
  • Check upstream libsixel and vendor package guidance for fixed releases or patches.
  • Avoid processing untrusted GIF files with affected libsixel builds.
  • Run image processing in sandboxed or least-privileged environments.
  • Restrict upload or conversion paths that invoke libsixel until assessed.

Validation and detection

  • Search SBOMs, lockfiles, containers, and host packages for libsixel 1.8.4.
  • Map where libsixel processes GIF input from users or external sources.
  • Review the linked GitHub issue and CVE record for remediation updates.
  • Confirm whether vendor-maintained packages backported a fix.
  • Verify compensating controls around affected image-processing workflows.
Prepared
Confidence
medium
Sources
3

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

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 · low confidence lookup

CVE-2019-20094 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
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
2Source 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

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.