# CVE-2019-1000019: Denial of service in n/a

> An out-of-bounds read in libarchive's 7zip decompression 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:** 4 Feb 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-1000019, GHSA-636v-c8v5-whhf, UBUNTU-CVE-2019-1000019

## What is CVE-2019-1000019?

CVE-2019-1000019 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 4 Feb 2019. 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

libarchive version commit bf9aec176c6748f0ee7a678c5f9f9555b9a757c1 onwards (release v3.0.2 onwards) contains a CWE-125: Out-of-bounds Read vulnerability in 7zip decompression, archive_read_support_format_7zip.c, header_bytes() that can result in a crash (denial of service). This attack appears to be exploitable via the victim opening a specially crafted 7zip file.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2019-1000019?

It affects 8 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Libarchive Libarchive, Opensuse Leap, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2019-1000019?

Upgrade to a fixed version.

## Is CVE-2019-1000019 being exploited?

There is no known exploitation of CVE-2019-1000019 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1000019 and fix it if it is affected.

What it is: CVE-2019-1000019 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 4 Feb 2019. 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-2019-1000019 in the wild and no public exploit code.

Affected product: Canonical Ubuntu 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-2019-1000019/ (Markdown: https://insights.sbomify.com/CVE-2019-1000019/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1000019
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1000019
- OSV: https://osv.dev/vulnerability/CVE-2019-1000019

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1000019/
Summaries are generated and may contain mistakes; the official description above is the record.