Security readout for executives and security teams
Plain-English summary
This flaw affects Antenna House Office Server Document Converter when handling Microsoft Word DOC files. A malicious DOC could corrupt memory and allow remote code execution during conversion. Business risk is highest where the converter processes files from customers, partners, email, or public upload workflows.
Executive priority
Treat as high priority if the converter handles external documents. Remote code execution in a document conversion service can affect confidentiality, integrity, and availability. If the product is not deployed or only handles trusted internal files, urgency is lower but inventory confirmation is still needed.
Technical view
CVE-2018-3933 is an out-of-bounds write in the Microsoft Word document conversion functionality of Antenna House Office Server Document Converter V6.1 Pro MR2 for Linux64, build 6,1,2018,0312. The issue occurs in the `vbputanld` method and can lead to remote code execution after processing a crafted DOC file.
Likely exposure
Exposure is likely limited to organizations running the affected Antenna House converter version, especially Linux64 deployments that automatically convert untrusted Microsoft Word DOC documents in web, mail, workflow, or document-management systems.
Exploitation context
The provided sources describe an exploitable crafted-DOC condition leading to remote code execution. The bundle does not show CISA KEV listing or other evidence of active exploitation. User interaction is reflected in CVSS, likely meaning the vulnerable system must process the malicious document.
Researcher notes
Talos identifies the vulnerable method as `vbputanld` and the impact as out-of-bounds write to remote code execution. The affected product/version is specific. The provided bundle does not name a CWE, fixed release, workaround, exploit-in-the-wild evidence, or KEV status.
Mitigation direction
- Identify all Antenna House Office Server Document Converter deployments and versions.
- Check Antenna House or Talos guidance for fixed versions or vendor workarounds.
- Pause or restrict untrusted DOC conversion until remediation is confirmed.
- Run conversion services with least privilege and strong process isolation.
- Limit access to conversion endpoints and queues that accept external documents.
Validation and detection
- Confirm whether version V6.1 Pro MR2 Linux64 build 6,1,2018,0312 is present.
- Map applications, upload paths, and queues that submit DOC files for conversion.
- Review recent converter crashes or abnormal DOC processing failures.
- Verify untrusted document conversion is isolated from sensitive systems and credentials.
- Document remediation status against vendor guidance when available.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-3933 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0600CVE 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.