Auth bypass in Istio
CVE-2022-39388
Istio is an open platform to connect, manage, and secure microservices. In versions on the 1.15.x branch prior to 1.15.3, a user can impersonate any workload identity within the service mesh if they have localhost access to the Istiod control plane. Version 1.15.3 contains a patch for this issue. There are no known workarounds.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Istio — versions >= 1.15.0-beta.0, < 1.15.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/istio/istio/security/advisories/GHSA-6c6p-h79f-g6p4 (Third Party Advisory)
- github.com/istio/istio/commit/346260e5115e9fbc65ba8a559bc686e6ca046a32 (Patch, Third Party Advisory)
- github.com/istio/istio/commit/9a643e270421560afb2630e00f76d46a55499df9 (Patch, Third Party Advisory)
- istio.io/latest/news/releases/1.15.x/announcing-1.15.3/ (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-39388?
- CVE-2022-39388 is a high-severity vulnerability in Istio, classified under Incorrect Authorization. CVSS score: 7.6/10. Published 2022-11-10.
- How severe is CVE-2022-39388?
- High severity. CVSS v3 base score is 7.6 out of 10.
- Is CVE-2022-39388 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.