Security readout for executives and security teams
Plain-English summary
This CVE describes a heap buffer overflow in OTFCC’s otfccdump component at commit 617837b. A malicious or malformed input could crash the tool, causing availability impact. The provided sources do not identify broad product packaging, confirmed fixes, or active exploitation.
Executive priority
Handle as a moderate availability issue. Prioritize environments that automatically process external files, because service disruption is the main reported impact. This is not currently supported as an active exploitation emergency by the supplied sources.
Technical view
CVE-2022-35039 is reported as CWE-787 heap buffer overflow in OTFCC commit 617837b, associated with /release-x64/otfccdump+0x6e20a0. CVSS 3.1 is 6.5, with user interaction required and high availability impact, but no confidentiality or integrity impact reported.
Likely exposure
Exposure is most likely where OTFCC or otfccdump processes untrusted font or asset files, including developer workstations, automated asset pipelines, or backend conversion services. The CVE metadata lists affected vendor, product, versions, and CPEs as n/a, so scope must be confirmed locally.
Exploitation context
The bundle includes a public GitHub PoC reference, but the CVE is not marked KEV and no provided source states active exploitation. Treat this as a denial-of-service risk from crafted input rather than confirmed in-the-wild compromise evidence.
Researcher notes
The record is sparse: affected product fields are n/a, no patch is named, and the crash location is given without broader version mapping. Public PoC material exists, so validation should focus on inventory, input trust boundaries, and upstream commit history.
Mitigation direction
- Check OTFCC upstream or vendor guidance for a fixed commit or release.
- Avoid processing untrusted files with vulnerable otfccdump builds.
- Run font-processing tools in isolated, least-privileged environments.
- Remove unused OTFCC tooling from production and CI images.
- Monitor CVE and upstream references for clarified affected versions.
Validation and detection
- Inventory systems, containers, CI jobs, and developer tools for OTFCC or otfccdump.
- Confirm whether any build maps to commit 617837b or nearby vulnerable code.
- Identify workflows that process externally supplied font or asset files.
- Review crash telemetry for otfccdump failures during file processing.
- Track whether upstream has published a patched revision.
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
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CWE-787: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-35039 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/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:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://drive.google.com/file/d/1EEF3Qb6qqaQrSdkxuaTLJB92bCfSi3od/view?usp=sharingCVE reference · x_refsource_MISC
- https://github.com/Cvjark/Poc/blob/main/otfcc/CVE-2022-35039.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.