CVE-2022-23495

HIGH
Published Dec 8, 20223y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Dec 8, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-252
CWE-755

Affected Products 1

VendorProductVersionRange
protocolgo-merkledag*≥0.4.0  –  <0.8.1

References 9

  • en.wikipedia.org https://en.wikipedia.org/wiki/Directed_acyclic_graph
    Technical DescriptionThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/issues/90
    PatchThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/pull/91
    PatchThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/pull/92
    PatchThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/pull/93
    PatchThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/releases/tag/v0.8.0
    Release NotesThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/releases/tag/v0.8.1
    Release NotesThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/security/advisories/GHSA-x39j-h85h-3f46
    Third Party Advisory
  • github.com https://github.com/ipfs/kubo/issues/9297
    PatchThird Party Advisory

Remediation

  • github.com https://github.com/ipfs/go-merkledag/issues/90
    PatchThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/pull/91
    PatchThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/pull/92
    PatchThird Party Advisory
  • github.com https://github.com/ipfs/go-merkledag/pull/93
    PatchThird Party Advisory
  • github.com https://github.com/ipfs/kubo/issues/9297
    PatchThird Party Advisory