Ether geth and Mist wallet: security updates

[bitfish]

Security Alert – Geth suffers from a very low probable DoS attack vector – Update immediately
Posted by Jeffrey Wilcke on May 17th, 2016.
Affected configurations: All Go client versions

Likelihood: Very low

Severity: High

Details: A bug in Geth (and potentially other clients) may suffer from a DoS attack and allows remote attackers to stall synchronisation process almost indefinitely by supplying a valid, lighter chain. More information will be given out a later time including the report that was submitted through the bug bounty program.

Effects on expected chain reorganisation depth: None

Proposed temporary workaround: None

Remedial action taken by Ethereum: Provision of hotfixes as below:
...

See: https://blog.ethereum.org/2016/05/17/security-alert-geth-suffers-from-a-very-low-probable-dos-attack-vector-update-immediately/


and

Wallet 0.7.4 (Beta 18)
@alexvandesande alexvandesande released this 8 days ago · 67 commits to master since this release

This is a security release. The details on the security issues are described on this blog post.

This is the first release to include geth 1.4 wich should come with some performance improvements and connection fixes.

See: https://github.com/ethereum/mist/releases/tag/0.7.4

Best wishes to all Ether fans!
bitfish 

[CryptoCoinWareHouse]

Ok when you download the new wallet what file do u replace and do you have to download the whole chain again what is the process to update

[mookid]

Ok when you download the new wallet what file do u replace and do you have to download the whole chain again what is the process to update

You just got to delete your old Mist folder, the Blockchain will not be replaced or downloaded again.