CVE-2023-23626 Denial of service when feeding malformed size arguments in go-bitfield

What is CVE-2023-23626?

CVE-2023-23626 is a medium-severity denial of service vulnerability in ipfs go-bitfield, published on 9 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

go-bitfield is a simple bitfield package for the go language aiming to be more performant that the standard library. When feeding untrusted user input into the size parameter of `NewBitfield` and `FromBytes` functions, an attacker can trigger `panic`s. This happen when the `size` is a not a multiple of `8` or is negative. There were already a note in the `NewBitfield` documentation, however known users of this package are subject to this issue. Users are advised to upgrade. Users unable to upgrade should ensure that `size` is a multiple of 8 before calling `NewBitfield` or `FromBytes`.

Weakness: CWE-1284, CWE-754

Which versions are affected by CVE-2023-23626?

3 open source packages ship an affected version, including github.com/ipfs/go-bitfield. It affects 1 product.

Products include Protocol Go-Bitfield.

How do I fix CVE-2023-23626?

Upgrade github.com/ipfs/go-bitfield to 1.1.0 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-23626 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-23626 exists.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-2h6c-j3gf-xp9r, GO-2023-1558.