# CVE-2019-13032: Null dereference in n/a

> A NULL pointer dereference in FlightCrew library functions allows attackers to cause a denial of service via crafted input.

- **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:** Yes
- **Published:** 28 Jun 2019
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-13032, GHSA-qg8h-9c83-r4h2, UBUNTU-CVE-2019-13032

## What is CVE-2019-13032?

CVE-2019-13032 is a medium-severity vulnerability in n/a, published on 28 Jun 2019. 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 FlightCrew v0.9.2 and earlier. A NULL pointer dereference occurs in GetRelativePathToNcx() or GetRelativePathsToXhtmlDocuments() when a NULL pointer is passed to xc::XMLUri::isValidURI(). This affects third-party software (not Sigil) that uses FlightCrew as a library.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2019-13032?

It affects 1 product.


Products: Flightcrew Project Flightcrew.

## How do I fix CVE-2019-13032?

Upgrade to a fixed version.

## Is CVE-2019-13032 being exploited?

There is no known exploitation of CVE-2019-13032 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-13032 and fix it if it is affected.

What it is: CVE-2019-13032 is a medium-severity vulnerability in n/a, published on 28 Jun 2019. 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-2019-13032 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-2019-13032/ (Markdown: https://insights.sbomify.com/CVE-2019-13032/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-13032
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-13032
- OSV: https://osv.dev/vulnerability/CVE-2019-13032

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-13032/
Summaries are generated and may contain mistakes; the official description above is the record.