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CVE-2021-45699 — Vulnerability in ckb — CVE Details

HIGH

Allocation of Resources Without Limits or Throttling in ckb

Published January 6, 2022Updated November 8, 2023Source: osv

Summary

An issue was discovered in the ckb crate before 0.40.0 for Rust. Remote attackers may be able to conduct a 51% attack against the Nervos CKB blockchain by triggering an inability to allocate memory for the misbehavior HashMap.

Advisory Timeline

  • First published January 6, 2022 (1740 days ago).
  • Last revised November 8, 2023 — 670 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update ckb to 0.40.0 or later
cargo update -p ckb --precise 0.40.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
ckb
crates.io
All versions0.40.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-770
    Allocation of Resources Without LimitsMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Frequently Asked Questions

What is CVE-2021-45699?
Allocation of Resources Without Limits or Throttling in ckb This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2021-45699?
CVE-2021-45699 affects ckb. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-45699 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-2969-8hh9-57jc
GHSA-48vq-8jqv-gm6f
RUSTSEC-2021-0108

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    CRITICAL

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    aws-smithy-json: Uncontrolled recursion in the aws-smithy-json unknown-key skip path allows unauthenticated remote denial of service in smithy-rs generated servers

More crates.io advisories

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