# CVE-2015-6783: Security feature bypass in n/a

> Attackers can bypass signature validation in Android Chrome by using a crafted ZIP archive, requiring user interaction to open the file.

- **Severity:** Medium 4.3 (`AV:N/AC:M/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 6 Dec 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-vpr7-fccx-29hw, UBUNTU-CVE-2015-6783

## What is CVE-2015-6783?

CVE-2015-6783 is a medium-severity vulnerability in Google Android, published on 6 Dec 2015. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The FindStartOffsetOfFileInZipFile function in crazy_linker_zip.cpp in crazy_linker (aka Crazy Linker) in Android 5.x and 6.x, as used in Google Chrome before 47.0.2526.73, improperly searches for an EOCD record, which allows attackers to bypass a signature-validation requirement via a crafted ZIP archive.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2015-6783?

It affects 1 product.


Products: Google Android.

## How do I fix CVE-2015-6783?

Upgrade to a fixed version.

## Is CVE-2015-6783 being exploited?

There is no known exploitation of CVE-2015-6783 in the wild and no public exploit code.

## Other vulnerabilities in Google Android

- [CVE-2026-58704](https://insights.sbomify.com/CVE-2026-58704/): Google Pixel Improper Authorization (high 8.8, exploited in the wild)
- [CVE-2025-48543](https://insights.sbomify.com/CVE-2025-48543/): Android Runtime Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2023-35674](https://insights.sbomify.com/CVE-2023-35674/): Android Framework Privilege Escalation (high 8.8, exploited in the wild)
- [CVE-2025-48595](https://insights.sbomify.com/CVE-2025-48595/): Android Framework Integer Overflow (high 8.4, exploited in the wild)
- [CVE-2024-32896](https://insights.sbomify.com/CVE-2024-32896/): Android Pixel Privilege Escalation (high 8.1, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-6783 and fix it if it is affected.

What it is: CVE-2015-6783 is a medium-severity vulnerability in Google Android, published on 6 Dec 2015. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2015-6783 in the wild and no public exploit code.

Affected product: Google Android. 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-2015-6783/ (Markdown: https://insights.sbomify.com/CVE-2015-6783/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-6783
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-6783
- OSV: https://osv.dev/vulnerability/CVE-2015-6783

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-6783/
Summaries are generated and may contain mistakes; the official description above is the record.