# CVE-2016-10434: Security feature bypass in Snapdragon Automobile, Snapdragon Mobile

> An attacker can bypass HMAC authentication in RPMB write responses by triggering error conditions before verification, compromising secure storage integrity.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Apr 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-qqcm-m6q5-fq97

## What is CVE-2016-10434?

CVE-2016-10434 is a high-severity vulnerability in Qualcomm Sd 820 Firmware, published on 18 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Automobile and Snapdragon Mobile SD 820 and SD 820A, the input to RPMB write response function is a buffer from HLOS that needs to be authenticated (using HMAC) and then processed. However, some of the processing occurs before the buffer is authenticated. The function will return various types of errors depending on the values of the `response` and `result` fields of the buffer before verifying the HMAC tag.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2016-10434?

It affects 2 products.


Products: Qualcomm Sd 820 Firmware, Qualcomm Sd 820a Firmware.

## How do I fix CVE-2016-10434?

No fix has been published for CVE-2016-10434 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-10434 being exploited?

There is no known exploitation of CVE-2016-10434 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-10434 and fix it if it is affected.

What it is: CVE-2016-10434 is a high-severity vulnerability in Qualcomm Sd 820 Firmware, published on 18 Apr 2018. 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-2016-10434 in the wild and no public exploit code.

Affected product: Qualcomm Sd 820 Firmware. 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-2016-10434/ (Markdown: https://insights.sbomify.com/CVE-2016-10434/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-10434
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-10434
- OSV: https://osv.dev/vulnerability/CVE-2016-10434

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-10434/
Summaries are generated and may contain mistakes; the official description above is the record.