#VU56150 Improper Authorization in Istio - CVE-2021-39155
Published: August 30, 2021
Vulnerability identifier: #VU56150
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-39155
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Istio
Istio
Software vendor:
Istio
Istio
Description
The vulnerability allows a remote attacker to bypass authorization check.
The vulnerability exists due to case insensitive host comparison. A remote attacker can send a specially crafted request to bypass authorization on the target system.
Remediation
Install updates from vendor's website.