Security alert [consensus issue]

This alert is expounded to a consensus challenge that occurred on the Frontier community at block 116,522, mined on 2015-08-20 at 14:59:16+02:00 – Subject has been mounted, see “Fix” beneath.

Influence: Excessive

Subject description: State database consensus challenge in geth with deletion of account knowledge, which might occur throughout SUICIDE directions.

Affected implementations: All geth implementations as much as and together with variations 1.0.1, 1.1.0 and develop (“unstable 1.1.0”) had been affected. Eth (C++) and pyethereum (Python) are unaffected.

Results on anticipated chain reorganisation depth: Enhance ready time for eventual block affirmation to 12 hours

Proposed short-term workaround: Miners change to eth or pyethereum asap

Remedial motion taken by Ethereum: Provision of fixes as beneath.

Repair: Be aware that the consensus  challenge occured simply earlier than the announcement of the brand new launch 1.1.0. When upgrading, please be sure to improve to the model you meant as you may not need to repair and improve from 1.0.1 to 1.1.0 (which has not but been formally launched) on the similar time. Fixes beneath are for model 1.0.2 – builds are generated for v 1.0.2. 

  • Launch 1.0.2 together with supply and binaries may be discovered here
  • If you’re constructing from supply: git pull adopted by make geth – please use the grasp department commit a0303ff4bdc17fba10baea4ce9ff250e5923efa2
  • If utilizing the PPA: sudo apt-get replace then sudo apt-get improve
  • We’re nonetheless engaged on the brew repair

The right model for this replace on Ubuntu AND OSX is Geth/v1.0.2-a0303f

Be aware that it’s possible that you simply obtain the next message alert which is able to resolve itself after some time as soon as your friends have up to date their shoppers:

I0820 19:00:53.368852    4539 chain_manager.go:776] Unhealthy block #116522 (05bef30ef572270f654746da22639a7a0c97dd97a7050b9e252391996aaeb689)

I0820 19:00:53.368891    4539 chain_manager.go:777] Discovered recognized unhealthy hash in chain 05bef30ef572270f654746da22639a7a0c97dd97a7050b9e


  • 20/08/15 17:47+02:00 Subject has been recognized and repair for geth is underway. Geth(Go)-Miners ought to improve asap as soon as the fixes grow to be out there and in the meantime change to Eth (C++) or Python. Eth (C++) and Python miners are unaffected.
  • 20/08/15 19:38+02:00 Official launch of fixes, see above.
  • 20/08/15 21:19+02:00 Be aware that the consenus  challenge occured simply earlier than the announcement of the brand new launch 1.0.2. Due to this fact, please be sure that you get the repair you need, i.e. stay on 1.0.1 or improve to 1.0.2. See “Fix” for extra particulars.
  • 21/08/15 11:30+2:00 For the reason that prevalence of the consensus challenge, we have been intently monitoring the chain and community. In accordance with community statistics, most miners have upgraded to the patched 1.0.2 or switched to eth. Our expectations regarding most possible chain-reorganization depth is 750 blocks.

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