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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-39156 Detail

Current Description

Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.


View Analysis Description

Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 3.x Severity and Vector Strings:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
Base Score:  8.1 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r Third Party Advisory 
https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r Third Party Advisory 
https://istio.io/latest/news/security/istio-security-2021-008 Vendor Advisory 
https://istio.io/latest/news/security/istio-security-2021-008 Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-706 Use of Incorrectly-Resolved Name or Reference cwe source acceptance level NIST  
CWE-863 Incorrect Authorization GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		Up to (excluding)
1.9.8
 cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		From (including)
1.10.0		Up to (excluding)
1.10.3
 cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		From (including)
1.11.0		Up to (excluding)
1.11.1

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-39156
NVD Published Date:
08/24/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.