CVE-2023-23625 Denial of service in HAMT Decoding in go-unixfs

2023-02-0920:57:22

CWE-400

GitHub_M

www.cve.org

unixfs filesystem

ipld merkledag

hamt

decoding

go-unixfs

panics

virtual memory leaks

upgrading

untrusted user input

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

0.001 Low

EPSS

Percentile

38.0%

JSON

go-unixfs is an implementation of a unix-like filesystem on top of an ipld merkledag. 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 bogus fanout parameter in the HAMT directory nodes. Users are advised to upgrade to version 0.4.3 to resolve this issue. Users unable to upgrade should not feed untrusted user data to the decoding functions.

CNA Affected

[
  {
    "vendor": "ipfs",
    "product": "go-unixfs",
    "versions": [
      {
        "version": "< 0.4.3",
        "status": "affected"
      }
    ]
  }
]