CVE-2020-8595
HIGH severity · CVSS 7.3 · Improper authentication
7.3CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactLow
Integrity impactLow
Availability impactLow
Exploit probability (EPSS)3%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/istio/istio/commits/master ↗
Additional information
- NVD record
- https://github.com/istio/istio/commits/masterPatch
- https://istio.io/news/security/istio-security-2020-001/Patch
- https://istio.io/news/security/Advisory
- https://access.redhat.com/security/cve/cve-2020-8595Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595Advisory
- https://access.redhat.com/errata/RHSA-2020:0477Advisory