Security readout for executives and security teams
Plain-English summary
This flaw can let a malicious or malformed PDF crash software that uses Poppler to process rich media annotations. The public record describes denial of service, not data theft or code execution. Business urgency is highest for systems that automatically process untrusted PDFs.
Executive priority
Treat as a focused availability risk. Prioritize internet-facing or business-critical document-processing paths first, then complete normal package updates across remaining endpoints and servers.
Technical view
Poppler 0.72.0 contains a reachable Object::getString assertion in Annot.c while constructing invalid rich media annotation assets in AnnotRichMedia. Triggering the assertion can terminate the affected PDF-processing process, causing denial of service.
Likely exposure
Exposure is most likely where Poppler or distro Poppler packages process PDFs from users, email, uploads, document previews, indexing, or conversion workflows. The bundle does not provide complete affected version ranges beyond Poppler 0.72.0 and vendor advisories.
Exploitation context
The sources describe attacker-caused denial of service through invalid rich media annotation assets. CISA KEV is false, and the provided sources do not claim active exploitation or public weaponization.
Researcher notes
Evidence is concise and points to an assertion-triggered crash in Poppler’s rich media annotation handling. No CVSS, CWE, or complete affected-version matrix is provided in the bundle, so version validation should rely on vendor advisories.
Mitigation direction
- Update Poppler packages using applicable Ubuntu or Red Hat security advisories.
- Check upstream Poppler guidance and merge request details for fixed versions.
- Limit automated processing of untrusted PDFs until affected systems are patched.
- Run PDF-processing services with isolation and restart controls where feasible.
Validation and detection
- Inventory Poppler versions and distro packages across PDF-processing hosts.
- Confirm installed packages match vendor advisory fixed builds.
- Review crash logs for AnnotRichMedia or Object::getString assertion failures.
- Identify workflows that automatically parse untrusted PDF 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-2018-20551 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://gitlab.freedesktop.org/poppler/poppler/merge_requests/146CVE reference · x_refsource_MISC
- USN-3886-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- https://gitlab.freedesktop.org/poppler/poppler/issues/703CVE reference · x_refsource_MISC
- RHSA-2019:2713CVE reference · vendor-advisory, x_refsource_REDHAT
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.