# CVE-2018-0781: Memory corruption in Microsoft Edge

> An attacker can execute arbitrary code in the context of the current user via a memory corruption flaw in the Microsoft Edge scripting engine.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Jan 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-c827-8pxg-p942

## What is CVE-2018-0781?

CVE-2018-0781 is a high-severity memory corruption vulnerability in Microsoft Chakracore, published on 4 Jan 2018. 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

Microsoft Edge in Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows an attacker to execute arbitrary code in the context of the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0758, CVE-2018-0762, CVE-2018-0768, CVE-2018-0769, CVE-2018-0770, CVE-2018-0772, CVE-2018-0773, CVE-2018-0774, CVE-2018-0775, CVE-2018-0776, CVE-2018-0777, and CVE-2018-0778.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2018-0781?

It affects 2 products.


Products: Microsoft Chakracore, Microsoft Edge.

## How do I fix CVE-2018-0781?

No fix has been published for CVE-2018-0781 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-0781 being exploited?

There is no known exploitation of CVE-2018-0781 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Chakracore

- [CVE-2018-8298](https://insights.sbomify.com/CVE-2018-8298/): ChakraCore Scripting Engine Type Confusion (high 7.5, exploited in the wild)
- [CVE-2020-0878](https://insights.sbomify.com/CVE-2020-0878/): Microsoft Edge and Internet Explorer Memory Corruption (medium 4.2, exploited in the wild)
- [CVE-2018-8500](https://insights.sbomify.com/CVE-2018-8500/): ChakraCore RCE Vulnerability (critical 9.8)
- [CVE-2017-11767](https://insights.sbomify.com/CVE-2017-11767/): ChakraCore vulnerable to privilege escalation (critical 9.8)
- [CVE-2017-8658](https://insights.sbomify.com/CVE-2017-8658/): ChakraCore RCE Vulnerability (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-0781 and fix it if it is affected.

What it is: CVE-2018-0781 is a high-severity memory corruption vulnerability in Microsoft Chakracore, published on 4 Jan 2018. 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-2018-0781 in the wild and no public exploit code.

Affected product: Microsoft Chakracore. 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-2018-0781/ (Markdown: https://insights.sbomify.com/CVE-2018-0781/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-0781
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-0781
- OSV: https://osv.dev/vulnerability/CVE-2018-0781

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-0781/
Summaries are generated and may contain mistakes; the official description above is the record.