GHSA-48vq-8jqv-gm6f

Source

https://github.com/advisories/GHSA-48vq-8jqv-gm6f

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/08/GHSA-48vq-8jqv-gm6f/GHSA-48vq-8jqv-gm6f.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-48vq-8jqv-gm6f

Aliases

Published

2021-08-25T21:01:23Z

Modified

2023-11-08T04:07:22.625998Z

Summary

Remote memory exhaustion in ckb

Details

In the ckb sync protocol, SyncState maintains a HashMap called 'misbehavior' that keeps a score of a peer's violations of the protocol. This HashMap is keyed to PeerIndex (an alias for SessionId), and entries are never removed from it. SessionId is an integer that increases monotonically with every new connection.

A remote attacker can manipulate this HashMap to grow forever, resulting in degraded performance and ultimately a panic on allocation failure or being killed by the OS, depending on the platform.

This is a critical severity security bug. It could be exploited to create a targeted or network-wide denial of service, to reduce the hash power of the network as part of a 51% attack, and perhaps in other creative ways.

An attack is trivial:

connect to another node
send an invalid sync protocol request, such as SendHeaders for non-consecutive blocks
disconnect
repeat

Database specific

{
    "nvd_published_at": null,
    "cwe_ids": [
        "CWE-400"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-02T21:53:41Z"
}

References

Affected packages

crates.io / ckb

Package

Name: ckb; View open source insights on deps.dev
Purl: pkg:cargo/ckb

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.40.0