SB2020020714 - Denial of service in Zcash
Published: February 7, 2020
Security Bulletin ID
SB2020020714
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource management error (CVE-ID: N/A)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to consensus failure in the network in zcashd, that causes nodes to permanently reject blocks based on their timestamps using subjective information. A remote attacker can isolate the node on the network, potentially tricking a miner or mining pool into rejecting a valid chain. An attacker could have strategically exploited this issue to 51% attack some nodes’ view of the chain and perform double-spending attacks.
Remediation
Install update from vendor's website.