modules:
  - module: github.com/ipfs/go-unixfsnode
    versions:
      - fixed: 1.5.2
    vulnerable_at: 1.5.1
    packages:
      - package: github.com/ipfs/go-unixfsnode/hamt
        symbols:
          - NewUnixFSHAMTShard
          - bitField
        derived_symbols:
          - AttemptHAMTShardFromNode
          - NewUnixFSHAMTShardWithPreload
          - _UnixFSHAMTShard.Length
          - _UnixFSHAMTShard.Lookup
          - _UnixFSHAMTShard.LookupByNode
          - _UnixFSHAMTShard.LookupBySegment
          - _UnixFSHAMTShard.LookupByString
          - _UnixFSShardedDir__ListItr.Next
      - package: github.com/ipfs/go-unixfsnode/data/builder
        symbols:
          - shard.bitmap
          - shard.serialize
        derived_symbols:
          - BlockSizes
          - BuildUnixFS
          - BuildUnixFSDirectory
          - BuildUnixFSFile
          - BuildUnixFSRecursive
          - BuildUnixFSShardedDirectory
          - BuildUnixFSSymlink
          - Data
          - DataType
          - Fanout
          - FileSize
          - FractionalNanoseconds
          - HashType
          - Mtime
          - Permissions
          - PermissionsString
          - Seconds
          - Time
description: |
    Trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.
    If you are reading untrusted user input, an attacker can then trigger a panic.

    This is caused by a bogus fanout parameter in the HAMT directory nodes.

    There are no known workarounds (users are advised to upgrade).
cves:
  - CVE-2023-23631
ghsas:
  - GHSA-4gj3-6r43-3wfc
credit: Jorropo
references:
  - advisory: https://github.com/ipfs/go-unixfsnode/security/advisories/GHSA-4gj3-6r43-3wfc
  - fix: https://github.com/ipfs/go-unixfsnode/commit/59050ea8bc458ae55246ae09243e6e165923e076