# CVE-2015-0817: Memory corruption in n/a

> Remote attackers can execute arbitrary code or read memory via crafted JavaScript due to improper bounds checking in Firefox's asm.js JIT compiler.

- **Severity:** Medium 6.8 (`AV:N/AC:M/Au:N/C:P/I:P/A:P`)
- **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:** 24 Mar 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-4rw7-7wpq-7g64, UBUNTU-CVE-2015-0817

## What is CVE-2015-0817?

CVE-2015-0817 is a medium-severity memory corruption vulnerability in Mozilla Firefox, published on 24 Mar 2015. 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

The asm.js implementation in Mozilla Firefox before 36.0.3, Firefox ESR 31.x before 31.5.2, and SeaMonkey before 2.33.1 does not properly determine the cases in which bounds checking may be safely skipped during JIT compilation and heap access, which allows remote attackers to read or write to unintended memory locations, and consequently execute arbitrary code, via crafted JavaScript.

Weakness: CWE-17

## Which versions are affected by CVE-2015-0817?

It affects 3 products.


Products: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Seamonkey.

## How do I fix CVE-2015-0817?

Upgrade to a fixed version.

## Is CVE-2015-0817 being exploited?

There is no known exploitation of CVE-2015-0817 in the wild and no public exploit code.

## Other vulnerabilities in Mozilla Firefox

- [CVE-2019-11708](https://insights.sbomify.com/CVE-2019-11708/): Mozilla Firefox and Thunderbird Sandbox Escape (critical 10.0, exploited in the wild)
- [CVE-2010-3765](https://insights.sbomify.com/CVE-2010-3765/): Mozilla Multiple Products Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2022-26486](https://insights.sbomify.com/CVE-2022-26486/): Mozilla Firefox Use-After-Free (critical 9.6, exploited in the wild)
- [CVE-2022-26485](https://insights.sbomify.com/CVE-2022-26485/): Mozilla Firefox Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2019-11707](https://insights.sbomify.com/CVE-2019-11707/): Mozilla Firefox and Thunderbird Type Confusion (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-0817 and fix it if it is affected.

What it is: CVE-2015-0817 is a medium-severity memory corruption vulnerability in Mozilla Firefox, published on 24 Mar 2015. 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-2015-0817 in the wild and no public exploit code.

Affected product: Mozilla Firefox. 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-2015-0817/ (Markdown: https://insights.sbomify.com/CVE-2015-0817/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-0817
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-0817
- OSV: https://osv.dev/vulnerability/CVE-2015-0817

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-0817/
Summaries are generated and may contain mistakes; the official description above is the record.