Vulnerability CVE-2020-8595


Published: 2020-02-12

Description:
Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. For example, an attacker can add a ? or # character to a URI that would otherwise satisfy an exact-path match.

Type:

CWE-287

(Improper Authentication)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Istio -> Istio 

 References:
https://access.redhat.com/errata/RHSA-2020:0477
https://access.redhat.com/security/cve/cve-2020-8595
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595
https://github.com/istio/istio/commits/master
https://istio.io/news/security/
https://istio.io/news/security/istio-security-2020-001/

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