# CVE-2018-7175: Null dereference in n/a

> A NULL pointer dereference in xpdf allows attackers to cause denial of service via a crafted JPX image with zero components.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Feb 2018
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2018-7175, GHSA-mghp-5h48-x5gx, UBUNTU-CVE-2018-7175

## What is CVE-2018-7175?

CVE-2018-7175 is a medium-severity vulnerability in Xpdfreader Xpdf, published on 15 Feb 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

An issue was discovered in xpdf 4.00. A NULL pointer dereference in readCodestream allows an attacker to cause denial of service via a JPX image with zero components.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2018-7175?

It affects 1 product.


Products: Xpdfreader Xpdf.

## How do I fix CVE-2018-7175?

No fix has been published for CVE-2018-7175 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-7175 being exploited?

There is no known exploitation of CVE-2018-7175 in the wild and no public exploit code.

## Other vulnerabilities in Xpdfreader Xpdf

- [CVE-2022-38928](https://insights.sbomify.com/CVE-2022-38928/): Null dereference in n/a (high 7.8)
- [CVE-2022-38222](https://insights.sbomify.com/CVE-2022-38222/): Use after free in n/a (high 7.8)
- [CVE-2022-33108](https://insights.sbomify.com/CVE-2022-33108/): Memory corruption in n/a (high 7.8)
- [CVE-2022-30524](https://insights.sbomify.com/CVE-2022-30524/): Memory corruption in n/a (high 7.8)
- [CVE-2020-24996](https://insights.sbomify.com/CVE-2020-24996/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7175 and fix it if it is affected.

What it is: CVE-2018-7175 is a medium-severity vulnerability in Xpdfreader Xpdf, published on 15 Feb 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-7175 in the wild and no public exploit code.

Affected product: Xpdfreader Xpdf. 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-2018-7175/ (Markdown: https://insights.sbomify.com/CVE-2018-7175/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7175
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7175
- OSV: https://osv.dev/vulnerability/CVE-2018-7175

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-7175/
Summaries are generated and may contain mistakes; the official description above is the record.