# CVE-2020-1798: Auth bypass in HUAWEI P30

> A logic error in NFC handling allows a guest user to perform operations beyond their privileges on HUAWEI P30 smartphones.

- **Severity:** Medium 4.6 (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 May 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-9wq4-fm8p-3j73

## What is CVE-2020-1798?

CVE-2020-1798 is a medium-severity authentication bypass vulnerability in HUAWEI P30, published on 29 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

HUAWEI P30 smartphones with versions earlier than 10.1.0.135(C00E135R2P11) have an improper authentication vulnerability. A logic error occurs when handling NFC work, an attacker should establish a NFC connection to the target phone, and then do a series of operations on the target phone. Successful exploit could allow a guest user do certain operation which is beyond the guest user's privilege.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2020-1798?

It affects 1 product.


Products: Huawei P30 Firmware.

## How do I fix CVE-2020-1798?

No fix has been published for CVE-2020-1798 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-1798 being exploited?

There is no known exploitation of CVE-2020-1798 in the wild and no public exploit code.

## Other vulnerabilities in HUAWEI P30

- [CVE-2020-1800](https://insights.sbomify.com/CVE-2020-1800/): Missing authorization in HUAWEI P30 (high 7.8)
- [CVE-2020-1812](https://insights.sbomify.com/CVE-2020-1812/): Auth bypass in HUAWEI P30 (high 7.8)
- [CVE-2019-5287](https://insights.sbomify.com/CVE-2019-5287/): Integer overflow in P30 (high 7.8)
- [CVE-2019-5288](https://insights.sbomify.com/CVE-2019-5288/): Integer overflow in P30 (high 7.8)
- [CVE-2021-22331](https://insights.sbomify.com/CVE-2021-22331/): Cross-site scripting in HUAWEI P30 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-1798 and fix it if it is affected.

What it is: CVE-2020-1798 is a medium-severity authentication bypass vulnerability in HUAWEI P30, published on 29 May 2020. 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-2020-1798 in the wild and no public exploit code.

Affected product: HUAWEI P30. 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-2020-1798/ (Markdown: https://insights.sbomify.com/CVE-2020-1798/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-1798
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-1798
- OSV: https://osv.dev/vulnerability/CVE-2020-1798

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-1798/
Summaries are generated and may contain mistakes; the official description above is the record.