Remote Exploit in Istio's Authorization Policy Handling
CVE-2021-31920

6.5MEDIUM

Key Information:

Vendor

Istio

Status
Istio
Vendor
CVE Published:
27 May 2021

What is CVE-2021-31920?

Istio versions prior to 1.8.6 and 1.9.5 contain a vulnerability that enables attackers to bypass authorization policies through specially crafted HTTP request paths. By using multiple slashes or escaped slash characters (%2F or %5C), an attacker can exploit this flaw, compromising the security framework intended to protect service interactions.

References

https://istio.io/latest/news/security/istio-security-2021...
x_refsource_CONFIRM

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.