# CVE-2024-2339: Improper Input Validation in PostgreSQL Anonymizer 1.2 allows table owner to gain superuser privileges via masking rule

> A table owner can gain superuser privileges by injecting malicious code into masking rules, which executes when applied by privileged users.

- **Severity:** High 8.0 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Mar 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-fvc5-hrmq-8hx4

## What is CVE-2024-2339?

CVE-2024-2339 is a high-severity vulnerability in DALIBO PostgreSQL Anonymizer, published on 8 Mar 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

PostgreSQL Anonymizer v1.2 contains a vulnerability  that allows a user who owns a table to elevate to superuser. A user can define a masking function for a column and place malicious code in that function. When a privileged user applies the masking rules using the static masking or the anonymous dump method, the malicious code is executed and can grant escalated privileges to the malicious user. PostgreSQL Anonymizer v1.2 does provide a protection against this risk with the restrict_to_trusted_schemas option, but that protection is incomplete. Users that don't own a table, especially masked users cannot exploit this vulnerability. The problem is resolved in v1.3.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2024-2339?

It affects 1 product.


Products: Dalibo Anonymizer.

## How do I fix CVE-2024-2339?

No fix has been published for CVE-2024-2339 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-2339 being exploited?

There is no known exploitation of CVE-2024-2339 in the wild and no public exploit code.

## Other vulnerabilities in DALIBO PostgreSQL Anonymizer

- [CVE-2024-2338](https://insights.sbomify.com/CVE-2024-2338/): SQL Injection in PostgreSQL Anonymizer 1.2 allows table owner to gain superuser privileges via masking rule (high 8.0)
- [CVE-2026-9617](https://insights.sbomify.com/CVE-2026-9617/): PostgreSQL Anonymizer: malicious column name allows SQL injection via anon.k_anonymity() function (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-2339 and fix it if it is affected.

What it is: CVE-2024-2339 is a high-severity vulnerability in DALIBO PostgreSQL Anonymizer, published on 8 Mar 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-2339 in the wild and no public exploit code.

Affected product: DALIBO PostgreSQL Anonymizer. 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-2024-2339/ (Markdown: https://insights.sbomify.com/CVE-2024-2339/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-2339
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-2339
- OSV: https://osv.dev/vulnerability/CVE-2024-2339

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-2339/
Summaries are generated and may contain mistakes; the official description above is the record.