RUSTSEC-2021-0108

    Dashboard / Vulnerabilities / RUSTSEC-2021-0108

    RUSTSEC-2021-0108

    Published: 25 Jul 2021Last Modified: 8 Nov 2023

    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.

    References: https://crates.io/crates/ckb, https://rustsec.org/advisories/RUSTSEC-2021-0108.html, https://github.com/nervosnetwork/ckb/security/advisories/GHSA-48vq-8jqv-gm6f

    Affected packages

    Package

    Name: ckb

    Purl: pkg:cargo/ckb

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0.0.0-0
    Fixed -0.40.0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    RUSTSEC-2021-0108 | CVE-DB