# CVE-2017-18212: Memory corruption in n/a

> A heap-based buffer over-read in JerryScript allows attackers to cause denial of service or disclose sensitive memory via crafted regular expressions.

- **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:** No
- **Published:** 1 Mar 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-429f-r833-95jh, UBUNTU-CVE-2017-18212

## What is CVE-2017-18212?

CVE-2017-18212 is a critical memory corruption vulnerability in Jerryscript Jerryscript, published on 1 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in JerryScript 1.0. There is a heap-based buffer over-read in the lit_read_code_unit_from_hex function in lit/lit-char-helpers.c via a RegExp("[\x0"); payload.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2017-18212?

It affects 1 product.


Products: Jerryscript Jerryscript.

## How do I fix CVE-2017-18212?

No fix has been published for CVE-2017-18212 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-18212 being exploited?

There is no known exploitation of CVE-2017-18212 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-2017-18212 and fix it if it is affected.

What it is: CVE-2017-18212 is a critical memory corruption vulnerability in Jerryscript Jerryscript, published on 1 Mar 2018. 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-2017-18212 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-2017-18212/ (Markdown: https://insights.sbomify.com/CVE-2017-18212/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-18212
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-18212
- OSV: https://osv.dev/vulnerability/CVE-2017-18212

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-18212/
Summaries are generated and may contain mistakes; the official description above is the record.