PT-2019-12713 · Istio · Istio

Haim Helman · Published 2019-06-05 · Updated 2022-02-15 · CVE-2019-12243

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Istio versions 1.1.x through 1.1.6

Description The issue is related to Incorrect Access Control. When the disablePolicyChecks variable is set to false, inbound TCP connections do not generate Check requests to istio-policy and external authorization is not applied. This behavior is a result of a change to the istio/pilot/pkg/networking/plugin/mixer/mixer.go file in version 1.1.

Recommendations For Istio versions 1.1.x through 1.1.6, as a temporary workaround, consider setting disablePolicyChecks to true to ensure that inbound TCP connections generate Check requests to istio-policy and external authorization is applied. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2019-12243

GHSA-6G5F-F5PM-MJRG

Affected Products

Istio

References · 7

• 🔥 https://istio.io/blog/2019/cve-2019-12243 · Exploit
• https://osv.dev/vulnerability/CVE-2019-12243 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-12243 · Security Note
• https://osv.dev/vulnerability/GHSA-6g5f-f5pm-mjrg · Vendor Advisory
• https://istio.io/about/notes · Vendor Advisory
• https://github.com/istio/istio/pull/13893/commits/91faba277439dab798185730d1624bd53e37bb06 · Note
• https://github.com/istio/istio/issues/13868 · Note