Summary
Dep Group Remote Memory Exhaustion (Denial of Service) in ckb
References
After resolving the outpoints of one dep group, we put the corresponding content into a vec ( https://github.com/nervosnetwork/ckb/blob/v0.42.0/util/types/src/core/cell.rs#L600-L617 ), there is a vulnerability to a memory dos attack because there is no determination of whether the outpoints is duplicated.
PoC:
before send dos tx rss:
105700
after rss:
2306932
DoS cost: 25.6 KB * 150 + dep_tx out_points capacity ( 36 * 150 * 100 = 540000 ) = 4380000 CKB
Send 50 dos_tx, memory exhausted: (25.6 KB * 150 * 100) * 50 = 19.2 GB
Impact
A remote attacker could exploit this vulnerability to exhaust ckb process memory of an affected node.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is GHSA-J35P-Q24R-5367? GHSA-J35P-Q24R-5367 is a high-severity security vulnerability in ckb (rust), affecting versions < 0.43.1. It is fixed in 0.43.1.
- Which versions of ckb are affected by GHSA-J35P-Q24R-5367? ckb (rust) versions < 0.43.1 is affected.
- Is there a fix for GHSA-J35P-Q24R-5367? Yes. GHSA-J35P-Q24R-5367 is fixed in 0.43.1. Upgrade to this version or later.
- Is GHSA-J35P-Q24R-5367 exploitable, and should I be worried? Whether GHSA-J35P-Q24R-5367 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-J35P-Q24R-5367 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-J35P-Q24R-5367? Upgrade
ckbto 0.43.1 or later.