CVE-2020-8595

moderate-risk
Published 2020-02-12

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.

Do I need to act?

~
1.1% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.3/10 High
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Redhat Istio

References (12)

Third Party Advisory https://access.redhat.com/errata/RHSA-2020:0477
Mitigation https://access.redhat.com/security/cve/cve-2020-8595
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595
Patch https://github.com/istio/istio/commits/master
Vendor Advisory https://istio.io/news/security/
Patch https://istio.io/news/security/istio-security-2020-001/
Third Party Advisory https://access.redhat.com/errata/RHSA-2020:0477
Mitigation https://access.redhat.com/security/cve/cve-2020-8595
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595
Patch https://github.com/istio/istio/commits/master
Vendor Advisory https://istio.io/news/security/
Patch https://istio.io/news/security/istio-security-2020-001/
36
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 3/34 · Minimal
Exposure 7/34 · Low