Celo-Blockchain 1.5.2 Security Patch

[mariano]

Last days celo-blockchain team fixed and security vulnerability that we are now sharing with the community at large.

You can read the details on

On Baklava Stall & Security Vulnerability fixed on 1.5.2

On Friday Jan 28th at 10:11pm PDT, the Baklava testnet stopped producing blocks. A number of validators were alerted, including cLabs. After investigating the reason, the cLabs blockchain team found a bug that allowed validators to reach consensus on an invalid block. A missing validation check meant that validators would accept a block proposed by another validator missing a metadata field used for uptime score calculation. Because this bug could have been used by a malicious validator to inte…