Security readout for executives and security teams
Plain-English summary
CVE-2022-35094 is a heap-buffer overflow in SWFTools, reported in code used while reading DCT Huffman data. The main business risk is service disruption when vulnerable tooling processes a crafted local file, likely in PDF-to-SWF conversion workflows. The CVE data does not identify affected released versions or a confirmed patch.
Executive priority
Treat this as a moderate operational risk for systems that process untrusted documents. Prioritize inventory and containment over emergency response unless SWFTools is exposed in automated conversion pipelines handling external files.
Technical view
The flaw is CWE-787 in SWFTools commit 772e55a2, in DCTStream::readHuffSym(DCTHuffTable*) at xpdf/Stream.cc. CVSS 3.1 is 5.5 with local attack vector, low complexity, no privileges, required user interaction, unchanged scope, and high availability impact only.
Likely exposure
Exposure is most likely on workstations, servers, or automated pipelines using SWFTools to process untrusted local documents. The provided affected-product fields are n/a, so version scope cannot be determined from the bundle alone.
Exploitation context
The CVE is not listed as KEV. A public proof-of-concept reference is included, but the bundle provides no evidence of active exploitation. CVSS indicates user interaction is required and impact is availability, not confidentiality or integrity.
Researcher notes
Evidence is limited: NVD-style affected product fields are n/a, and no fix is named in the provided sources. Do not infer remote code execution from the supplied CVSS; the recorded impact is availability only.
Mitigation direction
- Inventory SWFTools and pdf2swf usage across endpoints and conversion services.
- Check upstream issue and project guidance for fixed commits or release recommendations.
- Avoid processing untrusted PDFs with affected SWFTools builds.
- Run document conversion in a sandbox with least privileges.
- Monitor conversion jobs for crashes or abnormal termination.
Validation and detection
- Confirm whether deployed SWFTools builds include commit 772e55a2 or related vulnerable code.
- Identify workflows where SWFTools processes user-supplied documents.
- Verify conversion services run with containment and restricted filesystem access.
- Review logs for crashes in DCTStream or xpdf Stream handling.
- Track the GitHub issue for remediation status and version clarification.
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-2022-35094 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
- Medium
- CVSS
- 5.5 (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: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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/matthiaskramm/swftools/issues/182CVE reference · x_refsource_MISC
- https://github.com/Cvjark/Poc/blob/main/swftools/pdf2swf/CVE-2022-35094.mdCVE 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.