# CVE-2017-9105: Null dereference in n/a

> A remote attacker can trigger a pointer corruption in the adns library, potentially leading to remote code execution or denial of service.

- **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:** 18 Jun 2020
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-9105, GHSA-5g8r-gfq9-rv9g, UBUNTU-CVE-2017-9105

## What is CVE-2017-9105?

CVE-2017-9105 is a high-severity vulnerability in Fedoraproject Fedora, published on 18 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An issue was discovered in adns before 1.5.2. It corrupts a pointer when a nameserver speaks first because of a wrong number of pointer dereferences. This bug may well be exploitable as a remote code execution.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2017-9105?

It affects 2 products.


Products: Fedoraproject Fedora, Gnu Adns.

## How do I fix CVE-2017-9105?

Upgrade to a fixed version.

## Is CVE-2017-9105 being exploited?

There is no known exploitation of CVE-2017-9105 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-2017-9105 and fix it if it is affected.

What it is: CVE-2017-9105 is a high-severity vulnerability in Fedoraproject Fedora, published on 18 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-9105 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-2017-9105/ (Markdown: https://insights.sbomify.com/CVE-2017-9105/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9105
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9105
- OSV: https://osv.dev/vulnerability/CVE-2017-9105

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-9105/
Summaries are generated and may contain mistakes; the official description above is the record.