# CVE-2018-0361: Denial of service in ClamAV before 0.100.1 unknown

> Attackers can cause excessive CPU consumption and service unavailability by submitting small PDF files to ClamAV.

- **Severity:** Low 3.3 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L`)
- **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:** 16 Jul 2018
- **Updated:** 29 Nov 2024
- **Also known as:** ALPINE-CVE-2018-0361, CLEANSTART-2026-PH79520, DEBIAN-CVE-2018-0361, GHSA-6v8f-c4v7-qcfg, UBUNTU-CVE-2018-0361

## What is CVE-2018-0361?

CVE-2018-0361 is a low-severity denial of service vulnerability in Clamav Clamav, published on 16 Jul 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

ClamAV before 0.100.1 lacks a PDF object length check, resulting in an unreasonably long time to parse a relatively small file.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-0361?

It affects 2 products.


Products: Clamav Clamav, Debian Debian Linux.

## How do I fix CVE-2018-0361?

Upgrade to a fixed version.

## Is CVE-2018-0361 being exploited?

There is no known exploitation of CVE-2018-0361 in the wild and no public exploit code.

## Other vulnerabilities in Clamav Clamav

- [CVE-2010-0098](https://insights.sbomify.com/CVE-2010-0098/): Security feature bypass in n/a (critical 10.0)
- [CVE-2009-1372](https://insights.sbomify.com/CVE-2009-1372/): Memory corruption in n/a (critical 10.0)
- [CVE-2008-3914](https://insights.sbomify.com/CVE-2008-3914/): Denial of service in n/a (critical 10.0)
- [CVE-2008-0728](https://insights.sbomify.com/CVE-2008-0728/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-1615](https://insights.sbomify.com/CVE-2006-1615/): Other in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-0361 and fix it if it is affected.

What it is: CVE-2018-0361 is a low-severity denial of service vulnerability in Clamav Clamav, published on 16 Jul 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-2018-0361 in the wild and no public exploit code.

Affected product: Clamav Clamav. 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-2018-0361/ (Markdown: https://insights.sbomify.com/CVE-2018-0361/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-0361
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-0361
- OSV: https://osv.dev/vulnerability/CVE-2018-0361

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-0361/
Summaries are generated and may contain mistakes; the official description above is the record.