CVE-2022-23495

    Dashboard / Vulnerabilities / CVE-2022-23495

    CVE-2022-23495

    Published: 8 Dec 2022Last Modified: 12 Aug 2026

    Summary: ProtoNode may be modified such that common method calls may panic in ipfs/go-merkledag

    Details: go-merkledag implements the 'DAGService' interface and adds two ipld node types, Protobuf and Raw for the ipfs project. A `ProtoNode` may be modified in such a way as to cause various encode errors which will trigger a panic on common method calls that don't allow for error returns. A `ProtoNode` should only be able to encode to valid DAG-PB, attempting to encode invalid DAG-PB forms will result in an error from the codec. Manipulation of an existing (newly created or decoded) `ProtoNode` using the modifier methods did not account for certain states that would place the `ProtoNode` into an unencodeable form. Due to conformance with the [`github.com/ipfs/go-block-format#Block`](https://pkg.go.dev/github.com/ipfs/go-block-format#Block) and [`github.com/ipfs/go-ipld-format#Node`](https://pkg.go.dev/github.com/ipfs/go-ipld-format#Node) interfaces, certain methods, which internally require a re-encode if state has changed, will panic due to the inability to return an error. This issue has been addressed across a number of pull requests. Users are advised to upgrade to version 0.8.1 for a complete set of fixes. Users unable to upgrade may attempt to mitigate this issue by sanitising inputs when allowing user-input to set a new `CidBuilder` on a `ProtoNode` and by sanitising `Tsize` (`Link#Size`) values such that they are a reasonable byte-size for sub-DAGs where derived from user-input.

    References: https://en.wikipedia.org/wiki/Directed_acyclic_graph, https://github.com/ipfs/go-merkledag/releases/tag/v0.8.0, https://github.com/ipfs/go-merkledag/releases/tag/v0.8.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23495.json, https://github.com/ipfs/go-merkledag/security/advisories/GHSA-x39j-h85h-3f46, https://nvd.nist.gov/vuln/detail/CVE-2022-23495, https://github.com/ipfs/go-merkledag/issues/90, https://github.com/ipfs/kubo/issues/9297, https://github.com/ipfs/go-merkledag/pull/91, https://github.com/ipfs/go-merkledag/pull/92, https://github.com/ipfs/go-merkledag/pull/93

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 8794146d52c211b8af0456e734a248649e636be0
    Fixed -503ecaa8b898d65ddaee92ba8c6ae60b824004c1

    Affected versions

    v0.8.0

    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
    CVE-2022-23495 | CVE-DB