# CVE-2017-9108: Memory corruption in n/a

> A buffer overflow in adnshost allows attackers to cause crashes or leak memory contents by providing input without a final newline.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Jun 2020
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-9108, GHSA-33h2-rv7w-ppfj, UBUNTU-CVE-2017-9108

## What is CVE-2017-9108?

CVE-2017-9108 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 18 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in adns before 1.5.2. adnshost mishandles a missing final newline on a stdin read. It is wrong to increment used as well as setting r, since used is incremented according to r, later. Rather one should be doing what read() would have done. Without this fix, adnshost may read and process one byte beyond the buffer, perhaps crashing or perhaps somehow leaking the value of that byte.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2017-9108?

It affects 3 products.


Products: Fedoraproject Fedora, Gnu Adns, Opensuse Leap.

## How do I fix CVE-2017-9108?

Upgrade to a fixed version.

## Is CVE-2017-9108 being exploited?

There is no known exploitation of CVE-2017-9108 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-9108 and fix it if it is affected.

What it is: CVE-2017-9108 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 18 Jun 2020. 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-2017-9108 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2017-9108/ (Markdown: https://insights.sbomify.com/CVE-2017-9108/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9108
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9108
- OSV: https://osv.dev/vulnerability/CVE-2017-9108

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-9108/
Summaries are generated and may contain mistakes; the official description above is the record.