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github.com/ipfs/kubo affected by DOS Bitswap unbounded persistent memory leakGHSA-qvqg-6rp8-4p9h

MEDIUM

GHSA-qvqg-6rp8-4p9h is a medium-severity (CVSS 5.3) vulnerability in github.com/ipfs/kubo. A fix is available for github.com/ipfs/kubo — see the affected versions and patch details below.

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of May 11, 2023 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐹github.com/ipfs/kubo

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Impact

An attacker is able allocate arbitrarily many bytes in the Bitswap server by sending many WANT_BLOCK and or WANT_HAVE requests which are queued in an unbounded queue, with allocations that persist even if the connection is closed.

This affects users accepting or connecting untrusted connections such as by running in the public swarm and no pnet config. Nodes that are not publicly reachable but connects to untrusted nodes are also vulnerable to the untrusted nodes being connected to since libp2p connections are blindly bidirectional.

Patches

  • 19feb15833c6f4d6e7f1e1b132efaae96d76481d boxo update in Kubo
  • GHSA-m974-xj4j-7qv5 patches in boxo

Workarounds

Use PNET, swarm filters or resource manager allows list to block untrusted connections.

Note that using the resource manager will disrupt both client and server features because the bitswap protocol is a message based protocol mixing requests and responses.

References

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/ipfs/kuboall versions0.19.0go get github.com/ipfs/kubo@v0.19.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/ipfs/kubo, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/ipfs/kubo to 0.19.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qvqg-6rp8-4p9h is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

### Impact An attacker is able allocate arbitrarily many bytes in the Bitswap server by sending many `WANT_BLOCK` and or `WANT_HAVE` requests which are queued in an unbounded queue, with allocations that persist even if the connection is closed. This affects users accepting or connecting untrusted connections such as by running in the public swarm and no pnet config. Nodes that are not publicly reachable but connects to untrusted nodes are also vulnerable to the untrusted nodes being connected to since libp2p connections are blindly bidirectional. ### Patches - 19feb15833c6f4d6e7f1e1b132efaa
O3 Security · Impact-Aware SCA

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github.com/ipfs/kubo affected by DOS Bitswap…