Security readout for executives and security teams
Plain-English summary
CVE-2021-35041 is a denial-of-service issue in FISCO-BCOS V2.7.2 blockchain nodes. A malicious node can repeatedly send incorrectly formatted packets that the victim node fails to decode cleanly, causing sustained memory growth and eventual crash.
Executive priority
Treat this as a moderate availability risk for affected blockchain infrastructure. Prioritize inventory and peer-access review first; escalate if critical business processes depend on FISCO-BCOS V2.7.2 uptime.
Technical view
The source describes malformed or unformatted packet handling in the FISCO-BCOS V2.7.2 blockchain node. Continuous malformed input from a malicious node can trigger memory consumption and crash the node. No CVSS score, CWE, patch version, or affected CPE data is provided in the bundle.
Likely exposure
Exposure appears limited to environments running FISCO-BCOS V2.7.2 nodes that accept traffic from malicious or untrusted nodes.
Exploitation context
The CVE source says a malicious node can continuously send incorrectly formatted packets. CISA KEV is false, and the provided sources do not show active exploitation in the wild.
Researcher notes
Evidence is sparse: one CVE description and one GitHub issue reference. The bundle names FISCO-BCOS V2.7.2, but does not provide CVSS, CWE, patch status, CPEs, or proof of active exploitation.
Mitigation direction
- Identify any FISCO-BCOS V2.7.2 blockchain nodes in production or test networks.
- Check FISCO-BCOS issue 1951 and vendor releases for official remediation guidance.
- Restrict node connectivity to trusted peers where operationally possible.
- Monitor node memory, decode errors, restarts, and crash loops.
- Plan upgrade or workaround deployment only from confirmed vendor guidance.
Validation and detection
- Confirm deployed FISCO-BCOS node versions across all blockchain environments.
- Review logs for malformed packet handling, decode failures, and unexplained restarts.
- Check monitoring for sustained memory growth before node crashes.
- Verify peer access controls limit untrusted node communication.
- Track the linked GitHub issue for maintainer-confirmed fixes or workarounds.
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-2021-35041 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/FISCO-BCOS/FISCO-BCOS/issues/1951CVE 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.