# CVE-2023-21890: Code injection in Communications Converged Application Server

> Unauthenticated attackers can execute arbitrary code and take over the Oracle Communications Converged Application Server via network access.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Jan 2023
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-r23h-h8pw-fc6p

## What is CVE-2023-21890?

CVE-2023-21890 is a critical code injection vulnerability in Oracle Corporation Communications Converged Application Server, published on 17 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (component: Core).  Supported versions that are affected are 7.1.0 and  8.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via UDP to compromise Oracle Communications Converged Application Server.  Successful attacks of this vulnerability can result in takeover of Oracle Communications Converged Application Server. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2023-21890?

It affects 1 product.


Products: Oracle Communications Converged Application Server.

## How do I fix CVE-2023-21890?

No fix has been published for CVE-2023-21890 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-21890 being exploited?

There is no known exploitation of CVE-2023-21890 in the wild and no public exploit code.

## Other vulnerabilities in Oracle Corporation Communications Converged Application Server

- [CVE-2026-61223](https://insights.sbomify.com/CVE-2026-61223/): Auth bypass in Oracle Communications Converged Application Server (critical 9.0)
- [CVE-2026-61225](https://insights.sbomify.com/CVE-2026-61225/): Auth bypass in Oracle Communications Converged Application Server (high 8.1)
- [CVE-2026-61224](https://insights.sbomify.com/CVE-2026-61224/): Auth bypass in Oracle Communications Converged Application Server (high 8.0)
- [CVE-2026-61226](https://insights.sbomify.com/CVE-2026-61226/): Privilege escalation in Oracle Communications Converged Application Server (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-21890 and fix it if it is affected.

What it is: CVE-2023-21890 is a critical code injection vulnerability in Oracle Corporation Communications Converged Application Server, published on 17 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-21890 in the wild and no public exploit code.

Affected product: Oracle Corporation Communications Converged Application Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-21890/ (Markdown: https://insights.sbomify.com/CVE-2023-21890/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-21890
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-21890
- OSV: https://osv.dev/vulnerability/CVE-2023-21890

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-21890/
Summaries are generated and may contain mistakes; the official description above is the record.