CVE-2020-7219: Denial of Service (DoS) in HashiCorp Consul
7.5
CVSS Score
3.1
Basic Information
CVE ID
GHSA ID
EPSS Score
0.79802%
CWE
Published
5/18/2021
Updated
10/8/2023
KEV Status
No
Technology
Go
Technical Details
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
---|---|---|---|
github.com/hashicorp/consul | go | < 1.6.3 | 1.6.3 |
Vulnerability Intelligence
Miggo AI
Root Cause Analysis
The vulnerability stemmed from missing connection limits and timeouts in HTTP/RPC handlers. The patches add:
- Connection limiters in RPC handler (handleConn) using go-connlimit
- HTTP connection tracking via ConnState hooks
- Timeout enforcement in TLS handshakes
- Configuration parameters for limits Vulnerable functions are those directly processing network connections without these controls. The modified functions show where resource constraints were added, indicating previously unbounded processing.