# CVE-2018-17073: Null dereference in n/a

> A NULL pointer dereference in the bitmap library allows attackers to cause a denial of service via a crafted 4-bit image.

- **Severity:** High 7.5 (`CVSS:3.0/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:** No
- **Published:** 16 Sep 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-9qx5-gp64-8fhf

## What is CVE-2018-17073?

CVE-2018-17073 is a high-severity vulnerability in n/a, published on 16 Sep 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

wernsey/bitmap before 2018-08-18 allows a NULL pointer dereference via a 4-bit image.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2018-17073?

It affects 1 product.


Products: Bitmap Project Bitmap.

## How do I fix CVE-2018-17073?

No fix has been published for CVE-2018-17073 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-17073 being exploited?

There is no known exploitation of CVE-2018-17073 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-17073 and fix it if it is affected.

What it is: CVE-2018-17073 is a high-severity vulnerability in n/a, published on 16 Sep 2018. 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-2018-17073 in the wild and no public exploit code.

Affected product: n/a. 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-2018-17073/ (Markdown: https://insights.sbomify.com/CVE-2018-17073/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-17073
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-17073
- OSV: https://osv.dev/vulnerability/CVE-2018-17073

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-17073/
Summaries are generated and may contain mistakes; the official description above is the record.