CVE Vulnerability

CVE-2022-23495

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.

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/ipfs/go-merkledag/releases/tag/v0.8.1 Release Notes Third Party Advisory
https://github.com/ipfs/go-merkledag/releases/tag/v0.8.0 Release Notes Third Party Advisory
https://github.com/ipfs/go-merkledag/pull/93 Patch Third Party Advisory
https://github.com/ipfs/go-merkledag/security/advisories/GHSA-x39j-h85h-3f46 Third Party Advisory
https://github.com/ipfs/go-merkledag/pull/91 Patch Third Party Advisory
https://github.com/ipfs/kubo/issues/9297 Patch Third Party Advisory
https://github.com/ipfs/go-merkledag/pull/92 Patch Third Party Advisory
https://github.com/ipfs/go-merkledag/issues/90 Patch Third Party Advisory
https://en.wikipedia.org/wiki/Directed_acyclic_graph Technical Description Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:protocol:go-merkledag:*:*:*:*:*:*:*:*
Information

Published : 2022-12-08 10:15

Updated : 2022-12-12 05:46

NVD link : CVE-2022-23495

Mitre link : CVE-2022-23495

Products Affected
No products.
CWE
CWE-252

Unchecked Return Value