GHSA-q264-w97q-q778MediumCVSS 5.9

Denial of service via HAMT Decoding Panics

Published
February 10, 2023
Last Modified
May 20, 2024

🔗 CVE IDs covered (1)

CVE-2023-23625 →

📋 Description

Impact

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. This include checks returned in ipfs/go-bitfield GHSA-2h6c-j3gf-xp9r, as well as limiting the fanout to <= 1024 (to avoid attempts of arbitrary sized allocations).

Patches

  • https://github.com/ipfs/go-unixfs/commit/dbcc43ec3e2db0d01e8d80c55040bba3cf22cb4b

Workarounds

Do not feed untrusted user data to the decoding functions.

References

  • https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r

🎯 Affected products1

  • go/github.com/ipfs/go-unixfs:< 0.4.3

🔗 References (5)