# CVE-2018-5239: Security feature bypass in Norton App Lock

> Attackers can bypass the lock screen to gain unauthorized device access, affecting users of Norton App Lock.

- **Severity:** Medium 6.2 (`CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jul 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-72qx-wx8g-mph8

## What is CVE-2018-5239?

CVE-2018-5239 is a medium-severity vulnerability in Symantec Corporation Norton App Lock, published on 16 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Norton App Lock prior to v1.3.0.332 can be susceptible to a bypass exploit. In this type of circumstance, the exploit can allow the user to circumvent the app to prevent it from locking the device, thereby allowing the individual to gain device access.

## Which versions are affected by CVE-2018-5239?

It affects 1 product.


Products: Symantec Norton App Lock.

## How do I fix CVE-2018-5239?

No fix has been published for CVE-2018-5239 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-5239 being exploited?

There is no known exploitation of CVE-2018-5239 in the wild and no public exploit code.

## Other vulnerabilities in Symantec Corporation Norton App Lock

- [CVE-2016-6591](https://insights.sbomify.com/CVE-2016-6591/): Security feature bypass in Norton App Lock (high 7.1)
- [CVE-2017-15534](https://insights.sbomify.com/CVE-2017-15534/): Auth bypass in Norton App Lock (medium 6.7)
- [CVE-2018-18363](https://insights.sbomify.com/CVE-2018-18363/): Security feature bypass in Norton App Lock (medium 6.2)
- [CVE-2018-5242](https://insights.sbomify.com/CVE-2018-5242/): Security feature bypass in Norton App Lock (medium 6.2)
- [CVE-2019-18373](https://insights.sbomify.com/CVE-2019-18373/): Security feature bypass in Norton AppLock (medium 5.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-5239 and fix it if it is affected.

What it is: CVE-2018-5239 is a medium-severity vulnerability in Symantec Corporation Norton App Lock, published on 16 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-5239 in the wild and no public exploit code.

Affected product: Symantec Corporation Norton App Lock. 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-2018-5239/ (Markdown: https://insights.sbomify.com/CVE-2018-5239/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-5239
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-5239
- OSV: https://osv.dev/vulnerability/CVE-2018-5239

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-5239/
Summaries are generated and may contain mistakes; the official description above is the record.