Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTgybW0tZmZqci1oODZj

Authorization bypass in Istio

In Istio 1.5.0 though 1.5.8 and Istio 1.6.0 through 1.6.7, when users specify an AuthorizationPolicy resource with DENY actions using wildcard suffixes (e.g. *-some-suffix) for source principals or namespace fields, callers will never be denied access, bypassing the intended policy.

Specific Go Packages Affected

istio.io/istio/pilot/pkg/security/authz/model/matcher

Permalink: https://github.com/advisories/GHSA-82mm-ffjr-h86c
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTgybW0tZmZqci1oODZj
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 2 years ago
Updated: 7 months ago

CVSS Score: 6.8
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Identifiers: GHSA-82mm-ffjr-h86c, CVE-2020-16844
References:

• https://nvd.nist.gov/vuln/detail/CVE-2020-16844
• https://github.com/istio/istio/commit/4c73414556b83f0e75c1b3a0a89a23103a71573c
• https://github.com/istio/istio/commit/72d2e135374f421b656d6f1a21f474db46134ace
• https://github.com/istio/istio/releases
• https://github.com/istio/istio/releases/tag/1.5.9
• https://github.com/istio/istio/releases/tag/1.6.8
• https://istio.io/latest/news/releases/1.5.x/announcing-1.5.9/
• https://istio.io/latest/news/releases/1.6.x/announcing-1.6.8/
• https://istio.io/latest/news/security/istio-security-2020-009/
• https://github.com/advisories/GHSA-82mm-ffjr-h86c

Repository: https://github.com/istio/istio
Blast Radius: 14.8

Affected Packages