# CVE-2019-1010127: Use after free in vcftools

> Attackers can cause denial of service or execute code by tricking users into opening a malicious VCF file in VCFTools.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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:** 25 Jul 2019
- **Updated:** 5 Aug 2024
- **Also known as:** CVE-2019-1010129, DEBIAN-CVE-2019-1010127, GHSA-rw6f-42g4-c764, UBUNTU-CVE-2019-1010127

## What is CVE-2019-1010127?

CVE-2019-1010127 is a high-severity use after free vulnerability in vcftools, published on 25 Jul 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

VCFTools vcftools prior to version 0.1.15 is affected by: Use-after-free. The impact is: Denial of Service or possibly other impact (eg. code execution or information disclosure). The component is: The header::add_FILTER_descriptor method in header.cpp. The attack vector is: The victim must open a specially crafted VCF file.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2019-1010127?

It affects 1 product.


Products: Vcftools Project Vcftools.

## How do I fix CVE-2019-1010127?

Upgrade to a fixed version.

## Is CVE-2019-1010127 being exploited?

There is no known exploitation of CVE-2019-1010127 in the wild and no public exploit code.

## Other vulnerabilities in vcftools

- [CVE-2018-11129](https://insights.sbomify.com/CVE-2018-11129/): Use after free in n/a (high 7.8)
- [CVE-2018-11130](https://insights.sbomify.com/CVE-2018-11130/): Use after free in n/a (high 7.8)
- [CVE-2018-11099](https://insights.sbomify.com/CVE-2018-11099/): Information disclosure in n/a (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1010127 and fix it if it is affected.

What it is: CVE-2019-1010127 is a high-severity use after free vulnerability in vcftools, published on 25 Jul 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-2019-1010127 in the wild and no public exploit code.

Affected product: vcftools. 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-2019-1010127/ (Markdown: https://insights.sbomify.com/CVE-2019-1010127/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1010127
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1010127
- OSV: https://osv.dev/vulnerability/CVE-2019-1010127

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1010127/
Summaries are generated and may contain mistakes; the official description above is the record.