State transition and consensus difficulty in geth shopper causes panic (crash) when processing a (legitimate) block with a selected mixture of transactions, which can trigger total community instability if block is accepted and relayed by unaffected shoppers thus inflicting a DoS. This will likely occur in a block that comprises transactions which suicide to the block reward handle.
Affected configurations: Situation reported for Geth.Whereas investigating the problem, associated points have been found and corrected in pyethereum, therefore pyethapp can also be affected. C++ shoppers are unaffected.
Probability: Low
Severity: Excessive
Complexity: Excessive
Impression: Community Instability and DoS
Particulars: A block containing a selected mixture of transactions which embody a number of SUICIDE calls, whereas legitimate, causes panic crash in go-ethereum shopper and crash in pyethereum. Further particulars could also be posted when obtainable.
Results on anticipated chain reorganisation depth: None.
Remedial motion taken by Ethereum: Provision of fixes as under.
Proposed non permanent workaround: Change to unaffected shopper reminiscent of eth (C++).
Repair:Improve geth and pyethereum shopper software program.
go-ethereum (geth):
Please be aware that the present secure model of geth is now 1.1.1; in case you are operating 1.0 and utilizing a package deal supervisor reminiscent of apt-get or homebrew the shopper might be upgraded.
If utilizing the PPA: sudo apt-get replace then sudo apt-get improve
If utilizing brew: brew replace then brew reinstall ethereum
If utilizing a home windows binary: obtain the updated binary.
If you’re constructing from supply: git pull adopted by make geth (please use the Grasp department commit 8f09242d7f527972acb1a8b2a61c9f55000e955d)
The right model for this replace on Ubuntu AND OSX is Geth/v1.1.1-8f09242d
pyethereum:
Customers of pyethapp ought to reinstall
> pip set up pyethapp –force-reinstall
