# CVE-2015-3202: Privilege escalation in n/a

> Local attackers can escalate privileges and write to arbitrary files by exploiting environment variable handling in fusermount when invoking mount or umount.

- **Severity:** Low 3.6 (`AV:L/AC:L/Au:N/C:N/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 2 Jul 2015
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-3202, DLA-226-1, DLA-226-2, DLA-238-1, DSA-3266-1, DSA-3268-1, DSA-3268-2, GHSA-32rg-hvr8-56hx, MGASA-2015-0239, SUSE-SU-2015:1024-1, SUSE-SU-2015:1053-1, UBUNTU-CVE-2015-3202, USN-2617-1

## What is CVE-2015-3202?

CVE-2015-3202 is a low-severity vulnerability in Debian Debian Linux, published on 2 Jul 2015. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

fusermount in FUSE before 2.9.3-15 does not properly clear the environment before invoking (1) mount or (2) umount as root, which allows local users to write to arbitrary files via a crafted LIBMOUNT_MTAB environment variable that is used by mount's debugging feature.

Weakness: CWE-264

## Which versions are affected by CVE-2015-3202?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `fuse` | SUSE:Linux Enterprise Desktop 12 | All versions | 2.9.3-5.1 |
| `fuse` | SUSE:Linux Enterprise Server 12 | All versions | 2.9.3-5.1 |
| `fuse` | SUSE:Linux Enterprise Server for SAP Applications 12 | All versions | 2.9.3-5.1 |
| `fuse` | SUSE:Linux Enterprise Software Development Kit 12 | All versions | 2.9.3-5.1 |

Products: Debian Debian Linux, Fuse Project Fuse.

## How do I fix CVE-2015-3202?

Upgrade to a fixed version.

## Is CVE-2015-3202 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2015-3202 exists.

Public exploit code:

- Fuse 2.9.3-15 - Local Privilege Escalation (exploitdb)

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-3202 and fix it if it is affected.

What it is: CVE-2015-3202 is a low-severity vulnerability in Debian Debian Linux, published on 2 Jul 2015. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2015-3202 exists.

Affected product: Debian Debian 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-2015-3202/ (Markdown: https://insights.sbomify.com/CVE-2015-3202/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-3202
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-3202
- OSV: https://osv.dev/vulnerability/CVE-2015-3202

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-3202/
Summaries are generated and may contain mistakes; the official description above is the record.