CVE-2024-11991

Summary

Motoko's incremental garbage collector is impacted by an uninitialized memory access bug, caused by incorrect use of write barriers in a few locations. This vulnerability could potentially allow unauthorized read or write access to a Canister's memory. However, exploiting this bug requires the Canister to enable the incremental garbage collector or enhanced orthogonal persistence, which are non-default features in Motoko.

Affected Software

Weaknesses

• CWE-908: CWE-908 Use of Uninitialized Resource

Workarounds

Disable incremental garbage collector and enhanced orthogonal persistence. i.e. do not compile with —incremental-gc or –enhanced-orthogonal-persistence options.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/dfinity/motoko/pull/4677
• https://github.com/dfinity/motoko/security/advisories/GHSA-9rhg-3qf8-hrv3

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