Security readout for executives and security teams
Plain-English summary
This is a disputed low-severity CVE for libyal libexe. It alleges that opening a crafted executable-like file locally could trigger a heap buffer overflow and cause limited availability impact. The record shows no confidentiality or integrity impact, and the provided sources do not show active exploitation.
Executive priority
Track as low priority unless your organization processes untrusted executable files with libyal libexe. Because the issue is disputed and impact is limited, focus first on confirming whether the library is present and exposed in analysis workflows.
Technical view
The record describes CWE-787 heap-based buffer overflow in libexe_io_handle_read_coff_optional_header in libyal libexe before 20181128. CVSS 3.1 vector AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L indicates local attack, required user interaction, and low availability impact only. The vendor dispute is noted in GitHub issue 1.
Likely exposure
Exposure is most plausible where libyal libexe is installed or embedded and processes untrusted EXE or COFF-like files. The CVE metadata does not provide populated vendor, product, version, or CPE entries, so dependency inventory is required.
Exploitation context
The provided bundle does not indicate KEV listing or active exploitation. The scenario requires local access and user interaction, and the recorded impact is limited to availability. The vendor dispute reduces confidence in practical exploitability.
Researcher notes
Evidence is thin: affected CPEs are absent, the vendor disputes the issue, and the only referenced technical source is GitHub issue 1. Treat the CVE record as a lead for dependency validation rather than a confirmed high-risk vulnerability.
Mitigation direction
- Inventory whether libyal libexe is installed or embedded in tools.
- Review the vendor GitHub issue before treating the CVE as confirmed.
- If applicable, avoid builds before 20181128.
- Restrict automated processing of untrusted executable samples until reviewed.
- Check current vendor guidance for any clarified fix or mitigation.
Validation and detection
- Confirm whether any systems or pipelines use libyal libexe.
- Identify deployed libexe build dates or package versions.
- Review workflows that parse user-supplied EXE or COFF files.
- Document whether the vendor dispute affects your risk decision.
- Record compensating controls around untrusted file processing.
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.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-18900 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
- Low
- CVSS
- 3.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.3LowVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/libyal/libexe/issues/1CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.