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Istio may allow identity impersonation if user has localhost access

High severity GitHub Reviewed Published Nov 9, 2022 in istio/istio • Updated Jan 28, 2023

Package

gomod github.com/istio/istio (Go)

Affected versions

>= 1.15.0-beta.0, < 1.15.3

Patched versions

1.15.3

Description

Impact

User can impersonate any workload identity within the service mesh if they have localhost access to the Istiod control plane.

Patches

1.15.3

Workarounds

No. If using 1.15.2 please upgrade to 1.15.3 or later.

References

None at this time.

For more information

If you have any questions or comments about this advisory, please email us at istio-security-vulnerability-reports@googlegroups.com

References

@howardjohn howardjohn published to istio/istio Nov 9, 2022
Published to the GitHub Advisory Database Nov 9, 2022
Reviewed Nov 9, 2022
Published by the National Vulnerability Database Nov 10, 2022
Last updated Jan 28, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Adjacent
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS score

0.045%
(17th percentile)

Weaknesses

CVE ID

CVE-2022-39388

GHSA ID

GHSA-6c6p-h79f-g6p4

Source code

Credits

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