RUSTSEC-2021-0108

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Source

https://rustsec.org/advisories/RUSTSEC-2021-0108

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2021-0108.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2021-0108

Aliases

Published

2021-07-25T12:00:00Z

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.

Database specific

{
    "license": "CC0-1.0"
}

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

0.0.0-0

Fixed

0.40.0

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "os": [],
        "functions": [],
        "arch": []
    }
}

Database specific

{
    "cvss": null,
    "informational": null,
    "categories": []
}