Impact

Prior to the patch, when executing specific EVM opcodes related to memory operations that use evm_core::Memory::copy_large, the crate can over-allocate memory when it is not needed, making it possible for an attacker to perform denial-of-service attack.

Patches

The flaw was corrected in commit 19ade85. Users should upgrade to ==0.21.1, ==0.23.1, ==0.24.1, ==0.25.1, >=0.26.1.

Workarounds

None. Please upgrade your evm crate version

References

Fix commit: rust-ethereum/evm@19ade85

For more information

If you have any questions or comments about this advisory:

• Open an issue in evm repo
• Email Wei

References

• GHSA-4jwq-572w-4388
• https://nvd.nist.gov/vuln/detail/CVE-2021-29511
• rust-ethereum/evm@19ade85