SB2019111120 - Infinite loop in envoy
Published: November 11, 2019 Updated: August 8, 2020
Security Bulletin ID
SB2019111120
Severity
Medium
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) Infinite loop (CVE-ID: CVE-2019-18836)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used."
Remediation
Install update from vendor's website.