# CVE-2017-9250: Null dereference in n/a

> Remote attackers can cause a denial of service via NULL pointer dereference in JerryScript by submitting malformed JavaScript source code.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 28 May 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-7hxh-jjxh-rg67

## What is CVE-2017-9250?

CVE-2017-9250 is a high-severity vulnerability in Jerryscript Jerryscript, published on 28 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The lexer_process_char_literal function in jerry-core/parser/js/js-lexer.c in JerryScript 1.0 does not skip memory allocation for empty strings, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via malformed JavaScript source code, related to the jmem_heap_free_block function.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2017-9250?

It affects 1 product.


Products: Jerryscript Jerryscript.

## How do I fix CVE-2017-9250?

No fix has been published for CVE-2017-9250 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-9250 being exploited?

There is no known exploitation of CVE-2017-9250 in the wild and no public exploit code.

## Other vulnerabilities in Jerryscript Jerryscript

- [CVE-2023-36109](https://insights.sbomify.com/CVE-2023-36109/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-38961](https://insights.sbomify.com/CVE-2023-38961/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-22597](https://insights.sbomify.com/CVE-2020-22597/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-42863](https://insights.sbomify.com/CVE-2021-42863/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-43453](https://insights.sbomify.com/CVE-2021-43453/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-9250 and fix it if it is affected.

What it is: CVE-2017-9250 is a high-severity vulnerability in Jerryscript Jerryscript, published on 28 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-9250 in the wild and no public exploit code.

Affected product: Jerryscript Jerryscript. 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-2017-9250/ (Markdown: https://insights.sbomify.com/CVE-2017-9250/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-9250
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-9250
- OSV: https://osv.dev/vulnerability/CVE-2017-9250

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-9250/
Summaries are generated and may contain mistakes; the official description above is the record.