# CVE-2017-9936: Denial of service in n/a

> A crafted TIFF document causes a memory leak in LibTIFF, leading to remote denial of service.

- **Severity:** Medium 6.5 (`CVSS:3.0/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:** 26 Jun 2017
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2017-9936, DEBIAN-CVE-2017-9936, DLA-1023-1, GHSA-5ffm-f598-q72q, UBUNTU-CVE-2017-9936

## What is CVE-2017-9936?

CVE-2017-9936 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 26 Jun 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

In LibTIFF 4.0.8, there is a memory leak in tif_jbig.c. A crafted TIFF document can lead to a memory leak resulting in a remote denial of service attack.

Weakness: CWE-772 (Missing Release of Resource after Effective Lifetime)

## Which versions are affected by CVE-2017-9936?

It affects 3 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Libtiff Libtiff.

## How do I fix CVE-2017-9936?

Apply the vendor's patch.

## Is CVE-2017-9936 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-9936 exists.

Public exploit code:

- LibTIFF - 'tif_jbig.c' Denial of Service (exploitdb)

## 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-2017-9936 and fix it if it is affected.

What it is: CVE-2017-9936 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 26 Jun 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-9936 exists.

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-2017-9936/ (Markdown: https://insights.sbomify.com/CVE-2017-9936/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9936
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9936
- OSV: https://osv.dev/vulnerability/CVE-2017-9936

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-9936/
Summaries are generated and may contain mistakes; the official description above is the record.