Headline
GHSA-q264-w97q-q778: Denial of service via HAMT Decoding Panics
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/467d139a640ecee4f2e74643dafcc58bb3b54175
Workarounds
Do not feed untrusted user data to the decoding functions.
References
- https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r
Package
gomod github.com/ipfs/go-unixfs (Go)
Affected versions
< 0.4.3
Patched versions
0.4.3
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
- ipfs/go-unixfs@467d139
Workarounds
Do not feed untrusted user data to the decoding functions.
References
- GHSA-2h6c-j3gf-xp9r
References
- GHSA-q264-w97q-q778
- https://nvd.nist.gov/vuln/detail/CVE-2023-23625
- ipfs/go-unixfs@467d139
Last updated
Feb 10, 2023
Reviewed
Feb 10, 2023
Published to the GitHub Advisory Database
Feb 10, 2023
Published by the National Vulnerability Database
Feb 9, 2023
Jorropo published to ipfs/go-unixfs
Feb 9, 2023
Related news
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.