How severe is GHSA-q669-2vfg-cxcg?

No CVSS score has been assigned to GHSA-q669-2vfg-cxcg yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-q669-2vfg-cxcg?

GHSA-q669-2vfg-cxcg affects the following packages: ckb (crates.io). Ecosystems affected: crates.io.

How do I fix GHSA-q669-2vfg-cxcg?

Update ckb to 0.31.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q669-2vfg-cxcg is resolved across your whole dependency graph.

How do I detect GHSA-q669-2vfg-cxcg in my crates.io dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ckb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-q669-2vfg-cxcg if there is no patch (or I can't update yet)?

Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Is GHSA-q669-2vfg-cxcg actively exploited in the wild?

No public exploit code has been indexed for GHSA-q669-2vfg-cxcg yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-q669-2vfg-cxcg published, and has it been updated?

GHSA-q669-2vfg-cxcg was published on February 2, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🦀 crates.io

Not in CISA KEV

Nervos CKB Unaligned Pointer DereferenceGHSA-q669-2vfg-cxcg

Fix: nervosnetwork/ckb@adf8f0d

GHSA-q669-2vfg-cxcg is a security vulnerability in ckb. A fix is available for ckb — see the affected versions and patch details below.

Published

Feb 2, 2024

Updated

Feb 2, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Feb 2, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🦀ckb

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

via [email protected]

There are multiple type conversions in ckb that unsafely cast between byte pointers and other types of pointers. This results in unaligned pointers, which are not allowed by the Rust language, and are considered undefined behavior, meaning that the compiler is free to do anything with code. This can lead to unpredictable bugs that can become security vulnerabilities.

Some of the bugs here could potentially lead to buffer overreads in malformed data (it's not clear to me as I haven't investigated the practical impact of these bugs).

Two of these (in blockchain.rs) do not create unaligned data. They do though perform an unsafe operation that may not uphold the invariants of the safe function they are in, and could lead to undefined behavior and buffer overreads on malformed input.

These are of the same nature as those in my previous report about the molecule crate.

Patch attached for commit 1b09e37c8e1b7945495cd18d9782417fbe51e986 that fixes all cases I know of at this time.

Please consider this report for reward under the terms of the bug bounty program.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🦀crates.io	`ckb`	all versions	0.31.1`cargo update -p ckb --precise 0.31.1`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ckb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update ckb to 0.31.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q669-2vfg-cxcg is resolved across your whole dependency graph.
Workarounds
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

via [email protected] There are multiple type conversions in ckb that unsafely cast between byte pointers and other types of pointers. This results in unaligned pointers, which are not allowed by the Rust language, and are considered undefined behavior, meaning that the compiler is free to do anything with code. This can lead to unpredictable bugs that can become security vulnerabilities. Some of the bugs here could potentially lead to buffer overreads in malformed data (it's not clear to me as I haven't investigated the practical impact of these bugs). Two of these (in blockchain.rs) do no

O3 Security · Impact-Aware SCA

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