# CVE-2017-8284: Code injection in n/a

> Local attackers can inject code into setuid programs via QEMU's TCG mode, leading to privilege escalation.

- **Severity:** High 7.0 (`CVSS:3.0/AV:L/AC:H/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 Apr 2017
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2017-8284, GHSA-rw7x-4625-rjj4, UBUNTU-CVE-2017-8284

## What is CVE-2017-8284?

CVE-2017-8284 is a high-severity code injection vulnerability in Qemu Qemu, published on 26 Apr 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The disas_insn function in target/i386/translate.c in QEMU before 2.9.0, when TCG mode without hardware acceleration is used, does not limit the instruction size, which allows local users to gain privileges by creating a modified basic block that injects code into a setuid program, as demonstrated by procmail. NOTE: the vendor has stated "this bug does not violate any security guarantees QEMU makes.

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

## Which versions are affected by CVE-2017-8284?

It affects 1 product.


Products: Qemu Qemu.

## How do I fix CVE-2017-8284?

Upgrade to a fixed version.

## Is CVE-2017-8284 being exploited?

There is no known exploitation of CVE-2017-8284 in the wild and no public exploit code.

## Other vulnerabilities in Qemu Qemu

- [CVE-2022-36648](https://insights.sbomify.com/CVE-2022-36648/): Null dereference in n/a (critical 10.0)
- [CVE-2015-8556](https://insights.sbomify.com/CVE-2015-8556/): Race condition in n/a (critical 10.0)
- [CVE-2009-3616](https://insights.sbomify.com/CVE-2009-3616/): Use after free in n/a (critical 9.9)
- [CVE-2019-12928](https://insights.sbomify.com/CVE-2019-12928/): Command injection in n/a (critical 9.8)
- [CVE-2019-12929](https://insights.sbomify.com/CVE-2019-12929/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-8284 and fix it if it is affected.

What it is: CVE-2017-8284 is a high-severity code injection vulnerability in Qemu Qemu, published on 26 Apr 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-8284 in the wild and no public exploit code.

Affected product: Qemu Qemu. 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-2017-8284/ (Markdown: https://insights.sbomify.com/CVE-2017-8284/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-8284
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-8284
- OSV: https://osv.dev/vulnerability/CVE-2017-8284

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-8284/
Summaries are generated and may contain mistakes; the official description above is the record.