# CVE-2017-9216: Null dereference in n/a

> A NULL pointer dereference in the jbig2dec library allows attackers to cause a denial of service via a crafted file.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 24 May 2017
- **Updated:** 11 Sep 2024
- **Also known as:** DEBIAN-CVE-2017-9216, GHSA-654p-55pp-9qjq, MGASA-2018-0039, UBUNTU-CVE-2017-9216

## What is CVE-2017-9216?

CVE-2017-9216 is a medium-severity vulnerability in Debian Debian Linux, published on 24 May 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

libjbig2dec.a in Artifex jbig2dec 0.13, as used in MuPDF and Ghostscript, has a NULL pointer dereference in the jbig2_huffman_get function in jbig2_huffman.c. For example, the jbig2dec utility will crash (segmentation fault) when parsing an invalid file.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2017-9216?

It affects 2 products.


Products: Artifex Jbig2dec, Debian Debian Linux.

## How do I fix CVE-2017-9216?

Upgrade to a fixed version.

## Is CVE-2017-9216 being exploited?

There is no known exploitation of CVE-2017-9216 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2020-12268](https://insights.sbomify.com/CVE-2020-12268/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-7975](https://insights.sbomify.com/CVE-2017-7975/): Integer overflow in n/a (high 7.8)
- [CVE-2017-7976](https://insights.sbomify.com/CVE-2017-7976/): Integer overflow in n/a (high 7.1)
- [CVE-2017-7885](https://insights.sbomify.com/CVE-2017-7885/): Integer overflow in n/a (high 7.1)
- [CVE-2023-46361](https://insights.sbomify.com/CVE-2023-46361/): Denial of service in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-9216 and fix it if it is affected.

What it is: CVE-2017-9216 is a medium-severity vulnerability in Debian Debian Linux, published on 24 May 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2017-9216 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2017-9216/ (Markdown: https://insights.sbomify.com/CVE-2017-9216/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9216
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9216
- OSV: https://osv.dev/vulnerability/CVE-2017-9216

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-9216/
Summaries are generated and may contain mistakes; the official description above is the record.