Security readout for executives and security teams
Plain-English summary
CVE-2019-19308 is a crash bug in GNOME Font Viewer 3.34.0 when it parses a malformed TTF font missing a name section. The available sources describe a NULL pointer dereference, which usually means denial of service for the application, not system compromise.
Executive priority
Treat this as a low-priority desktop hardening issue unless the organization routinely handles untrusted font files. It is not supported by the provided sources as remotely exploitable, actively exploited, or capable of code execution.
Technical view
The flaw is in text_to_glyphs in sushi-font-widget.c. A TTF file without a name section can lead g_strconcat to return NULL, causing a NULL pointer dereference during font parsing. The source bundle does not provide CVSS, CWE, patch details, or broader affected-version ranges.
Likely exposure
Exposure is most likely on Linux desktops or environments using GNOME Font Viewer 3.34.0 where users preview or open untrusted TTF font files. Server exposure is unlikely unless the application is used in an automated font-processing workflow.
Exploitation context
The bundle does not show active exploitation, and the CVE is not listed as KEV. Exploitation appears to require a crafted TTF file being parsed by GNOME Font Viewer. The documented impact is an application crash from NULL pointer dereference.
Researcher notes
Evidence is limited to the CVE description, a GNOME issue reference, and source lines around the vulnerable code. No CVSS vector, CWE, patch commit, exploit status, or complete affected-version range is provided in the bundle.
Mitigation direction
- Check GNOME and Linux distribution advisories for fixed packages or vendor guidance.
- Update gnome-font-viewer through trusted vendor package channels if a fixed build is available.
- Avoid previewing untrusted TTF files on systems running GNOME Font Viewer 3.34.0.
- Restrict font handling on sensitive workstations until exposure is confirmed.
- Consider removing the viewer where it is not operationally required.
Validation and detection
- Inventory desktop systems for GNOME Font Viewer 3.34.0.
- Review package changelogs for CVE-2019-19308 or GNOME issue 17 references.
- Confirm whether users receive or preview untrusted TTF files.
- Check helpdesk or crash telemetry for gnome-font-viewer crashes involving TTF files.
- Document any vendor-fixed version found during package review.
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-2019-19308 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://github.com/GNOME/gnome-font-viewer/blob/919dfbe684b75904563b8c6723c9778a4e00aad7/src/sushi-font-widget.c#L115-L117CVE reference · x_refsource_MISC
- https://gitlab.gnome.org/GNOME/gnome-font-viewer/issues/17CVE reference · x_refsource_CONFIRM
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.