# CVE-2019-8703: Privilege escalation in iOS

> An application can gain elevated privileges due to insufficient entitlements, affecting Apple operating systems.

- **Severity:** Critical 9.8 (`CVSS:3.1/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:** 23 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4g77-86xf-vfq8

## What is CVE-2019-8703?

CVE-2019-8703 is a critical vulnerability in Apple Iphone Os, published on 23 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

This issue was addressed with improved entitlements. This issue is fixed in watchOS 6, tvOS 13, macOS Catalina 10.15, iOS 13. An application may be able to gain elevated privileges.

## Which versions are affected by CVE-2019-8703?

It affects 4 products.


Products: Apple Iphone Os, Apple Mac Os X, Apple Tvos, Apple Watchos.

## How do I fix CVE-2019-8703?

No fix has been published for CVE-2019-8703 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-8703 being exploited?

There is no known exploitation of CVE-2019-8703 in the wild and no public exploit code.

## Other vulnerabilities in Apple Iphone Os

- [CVE-2021-30666](https://insights.sbomify.com/CVE-2021-30666/): Apple iOS WebKit Buffer Overflow (high 8.8, exploited in the wild)
- [CVE-2021-30761](https://insights.sbomify.com/CVE-2021-30761/): Apple iOS WebKit Memory Corruption (high 8.8, exploited in the wild)
- [CVE-2021-30762](https://insights.sbomify.com/CVE-2021-30762/): Apple iOS WebKit Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2016-4657](https://insights.sbomify.com/CVE-2016-4657/): Apple iOS Webkit Memory Corruption (high 8.8, exploited in the wild)
- [CVE-2019-7286](https://insights.sbomify.com/CVE-2019-7286/): Apple Multiple Products Memory Corruption (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-8703 and fix it if it is affected.

What it is: CVE-2019-8703 is a critical vulnerability in Apple Iphone Os, published on 23 Dec 2021. 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-2019-8703 in the wild and no public exploit code.

Affected product: Apple Iphone Os. 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-2019-8703/ (Markdown: https://insights.sbomify.com/CVE-2019-8703/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-8703
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-8703
- OSV: https://osv.dev/vulnerability/CVE-2019-8703

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-8703/
Summaries are generated and may contain mistakes; the official description above is the record.