CVE-2021-45699 json
Allocation of Resources Without Limits or Throttling in ckb
published 2021-07-25 5 y ago modified 2026-10-12 28 d ago also GHSA-2969-8hh9-57jc , GHSA-48vq-8jqv-gm6f , RUSTSEC-2021-0108 , EUVD-2022-0422
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 74%
- public exploits
- 0
- none known
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.
Patch / fix
- crates.io ckb 0.40.0
- nervos ckb 0.40.0
Exploit prediction
1.52% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | ckb | <0.40.0 >=0.0.0-0, <0.40.0 |
0.40.0 |
Classification
References
-
rustsec.org
/advisories/RUSTSEC-2021-0108.html
web, third-party-advisory, advisory
-
raw.githubusercontent.com
/rustsec/advisory-db/main/crates/ckb/RUSTSEC-2021-0108.md
web, third-party-advisory
-
github.com
/nervosnetwork/ckb/security/advisories/GHSA-48vq-8jqv-gm6f
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-45699
advisory
-
github.com
/nervosnetwork/ckb
package
-
crates.io
/crates/ckb
package
Sources
- CVE List CVE-2021-45699
- GitHub Advisory GHSA-2969-8hh9-57jc
- GitHub Advisory GHSA-48vq-8jqv-gm6f
- NVD CVE-2021-45699
- OSV RUSTSEC-2021-0108
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.