Security readout for executives and security teams
Plain-English summary
CVE-2019-19962 is a wolfSSL cryptography flaw affecting versions before 4.3.0. The sources say a mishandled signing hash call can enable fault injection against RSA cryptography. Business urgency depends on whether wolfSSL is present in products, services, or firmware that perform RSA signing.
Executive priority
Treat this as an inventory-driven cryptography remediation item. Escalate if wolfSSL before 4.3.0 is found in signing services, security appliances, or embedded products with high trust impact.
Technical view
wolfSSL before 4.3.0 mishandles calls to wc_SignatureGenerateHash, leading to RSA fault-injection exposure. The provided sources do not include CVSS, CWE classification, exploit details, or deployment-specific impact. The referenced upstream release and commit indicate the issue was addressed around wolfSSL 4.3.0.
Likely exposure
Exposure is most likely in applications, appliances, embedded systems, or firmware bundling wolfSSL before 4.3.0 and using RSA signing paths. The bundle does not identify specific downstream vendors or products.
Exploitation context
The source bundle does not report active exploitation, and KEV is false. The vulnerability class requires relevant cryptographic use and fault-injection conditions, so practical risk depends heavily on deployment context and attacker access.
Researcher notes
Evidence is sparse: no CVSS, CWE, exploit report, or detailed affected CPEs are provided. Analysis should focus on confirming wolfSSL version, RSA signing usage, and whether the upstream 4.3.0-era fix is present.
Mitigation direction
- Inventory all direct and bundled wolfSSL copies.
- Upgrade wolfSSL to 4.3.0 or later where applicable.
- Check vendor firmware or appliance advisories for bundled wolfSSL updates.
- Prioritize systems performing RSA signing operations.
- Track vendor guidance if source or firmware updates are unavailable.
Validation and detection
- Confirm the deployed wolfSSL version in each application or firmware image.
- Check build manifests and SBOMs for wolfSSL before 4.3.0.
- Identify whether RSA signing code paths are enabled or reachable.
- Verify patched builds include the referenced upstream fix.
- Document products where bundled wolfSSL version cannot be confirmed.
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-2019-19962 mapping review
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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://github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stableCVE reference · x_refsource_MISC
- https://github.com/wolfSSL/wolfssl/commit/23878512c65834d12811b1107d19a001478eca5dCVE 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.