# CVE-2016-0766: Privilege escalation in n/a

> Attackers can gain privileges by exploiting improper access restrictions on PL/Java configuration settings in PostgreSQL.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Feb 2016
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-cr7c-24h8-pv37, UBUNTU-CVE-2016-0766

## What is CVE-2016-0766?

CVE-2016-0766 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 17 Feb 2016. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

PostgreSQL before 9.1.20, 9.2.x before 9.2.15, 9.3.x before 9.3.11, 9.4.x before 9.4.6, and 9.5.x before 9.5.1 does not properly restrict access to unspecified custom configuration settings (GUCS) for PL/Java, which allows attackers to gain privileges via unspecified vectors.

Weakness: CWE-264

## Which versions are affected by CVE-2016-0766?

It affects 3 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Postgresql Postgresql.

## How do I fix CVE-2016-0766?

Upgrade to a fixed version.

## Is CVE-2016-0766 being exploited?

There is no known exploitation of CVE-2016-0766 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-0766 and fix it if it is affected.

What it is: CVE-2016-0766 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 17 Feb 2016. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-0766 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. 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-2016-0766/ (Markdown: https://insights.sbomify.com/CVE-2016-0766/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-0766
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-0766
- OSV: https://osv.dev/vulnerability/CVE-2016-0766

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-0766/
Summaries are generated and may contain mistakes; the official description above is the record.