# CVE-2018-20135: Security feature bypass in n/a

> Attackers can bypass SSL and signature checks to inject malicious code during app installation via man-in-the-middle attacks.

- **Severity:** High 8.1 (`CVSS:3.0/AV:N/AC:H/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:** 7 Jun 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-3wcx-33v7-xf78

## What is CVE-2018-20135?

CVE-2018-20135 is a high-severity vulnerability in n/a, published on 7 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Samsung Galaxy Apps before 4.4.01.7 allows modification of the hostname used for load balancing on installations of applications through a man-in-the-middle attack. An attacker may trick Galaxy Apps into using an arbitrary hostname for which the attacker can provide a valid SSL certificate, and emulate the API of the app store to modify existing apps at installation time. The specific flaw involves an HTTP method to obtain the load-balanced hostname that enforces SSL only after obtaining a hostname from the load balancer, and a missing app signature validation in the application XML. An attacker can exploit this vulnerability to achieve Remote Code Execution on the device. The Samsung ID is SVE-2018-12071.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2018-20135?

It affects 1 product.


Products: Samsung Galaxy Apps.

## How do I fix CVE-2018-20135?

No fix has been published for CVE-2018-20135 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-20135 being exploited?

There is no known exploitation of CVE-2018-20135 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-10502](https://insights.sbomify.com/CVE-2018-10502/): Privilege escalation in Samsung Galaxy Apps (high 7.8)
- [CVE-2018-10499](https://insights.sbomify.com/CVE-2018-10499/): Code injection in Samsung Galaxy Apps (high 7.0)
- [CVE-2018-10500](https://insights.sbomify.com/CVE-2018-10500/): Privilege escalation in Samsung Galaxy Apps (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-20135 and fix it if it is affected.

What it is: CVE-2018-20135 is a high-severity vulnerability in n/a, published on 7 Jun 2019. 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-2018-20135 in the wild and no public exploit code.

Affected product: n/a. 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-2018-20135/ (Markdown: https://insights.sbomify.com/CVE-2018-20135/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-20135
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-20135
- OSV: https://osv.dev/vulnerability/CVE-2018-20135

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-20135/
Summaries are generated and may contain mistakes; the official description above is the record.