# CVE-2019-5280: Security feature bypass in CloudLink Phone 7900

> Attackers can bypass TLS certificate verification in Huawei CloudLink phones via MITM, causing abnormal registration and service disruption.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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:** 13 Aug 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-prwp-rv3c-r8v8

## What is CVE-2019-5280?

CVE-2019-5280 is a medium-severity vulnerability in Huawei CloudLink Phone 7900, published on 13 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The SIP TLS module of Huawei CloudLink Phone 7900 with V600R019C10 has a TLS certificate verification vulnerability. Due to insufficient verification of specific parameters of the TLS server certificate, attackers can perform man-in-the-middle attacks, leading to the affected phones registered abnormally, affecting the availability of IP phones.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2019-5280?

It affects 1 product.


Products: Huawei Cloudlink Phone 7900 Firmware.

## How do I fix CVE-2019-5280?

No fix has been published for CVE-2019-5280 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5280 being exploited?

There is no known exploitation of CVE-2019-5280 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5280 and fix it if it is affected.

What it is: CVE-2019-5280 is a medium-severity vulnerability in Huawei CloudLink Phone 7900, published on 13 Aug 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-2019-5280 in the wild and no public exploit code.

Affected product: Huawei CloudLink Phone 7900. 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-2019-5280/ (Markdown: https://insights.sbomify.com/CVE-2019-5280/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5280
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5280
- OSV: https://osv.dev/vulnerability/CVE-2019-5280

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-5280/
Summaries are generated and may contain mistakes; the official description above is the record.