# CVE-2017-5375: Memory corruption in Firefox

> JIT code allocation flaws allow bypassing ASLR and DEP, enabling memory corruption attacks in Firefox and Thunderbird.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 11 Jun 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-5375, GHSA-m73w-mj59-ggvj, UBUNTU-CVE-2017-5375

## What is CVE-2017-5375?

CVE-2017-5375 is a critical memory corruption vulnerability in Debian Debian Linux, published on 11 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

JIT code allocation can allow for a bypass of ASLR and DEP protections leading to potential memory corruption attacks. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2017-5375?

It affects 6 products.


Products: Debian Debian Linux, Mozilla Firefox, Mozilla Thunderbird, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2017-5375?

Upgrade to a fixed version.

## Is CVE-2017-5375 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-5375 exists.

Public exploit code:

- Firefox 50.0.1 - ASM.JS JIT-Spray Remote Code Execution (exploitdb)
- Firefox 46.0.1 - ASM.JS JIT-Spray Remote Code Execution (exploitdb)
- Firefox 44.0.2 - ASM.JS JIT-Spray Remote Code Execution (exploitdb)

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-5375 and fix it if it is affected.

What it is: CVE-2017-5375 is a critical memory corruption vulnerability in Debian Debian Linux, published on 11 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-5375 exists.

Affected product: Debian Debian 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-2017-5375/ (Markdown: https://insights.sbomify.com/CVE-2017-5375/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-5375
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-5375
- OSV: https://osv.dev/vulnerability/CVE-2017-5375

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-5375/
Summaries are generated and may contain mistakes; the official description above is the record.