# CVE-2016-5399: Memory corruption in n/a

> Remote attackers can execute arbitrary code or cause denial of service via a crafted bz2 archive processed by the PHP bz2 extension.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 21 Apr 2017
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-3wxp-gf5c-jh8g, UBUNTU-CVE-2016-5399

## What is CVE-2016-5399?

CVE-2016-5399 is a high-severity memory corruption vulnerability in Php Php, published on 21 Apr 2017. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The bzread function in ext/bz2/bz2.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 allows remote attackers to cause a denial of service (out-of-bounds write) or execute arbitrary code via a crafted bz2 archive.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2016-5399?

It affects 1 product.


Products: Php Php.

## How do I fix CVE-2016-5399?

Upgrade to a fixed version.

## Is CVE-2016-5399 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-5399 exists.

Public exploit code:

- PHP 5.5.37/5.6.23/7.0.8 - 'bzread()' Out-of-Bounds Write (exploitdb)

## Other vulnerabilities in Php Php

- [CVE-2012-2688](https://insights.sbomify.com/CVE-2012-2688/): Integer overflow in n/a (critical 10.0)
- [CVE-2012-2376](https://insights.sbomify.com/CVE-2012-2376/): Memory corruption in n/a (critical 10.0)
- [CVE-2011-3268](https://insights.sbomify.com/CVE-2011-3268/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-4143](https://insights.sbomify.com/CVE-2009-4143/): Other in n/a (critical 10.0)
- [CVE-2008-5557](https://insights.sbomify.com/CVE-2008-5557/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-5399 and fix it if it is affected.

What it is: CVE-2016-5399 is a high-severity memory corruption vulnerability in Php Php, published on 21 Apr 2017. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-5399 exists.

Affected product: Php Php. 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-2016-5399/ (Markdown: https://insights.sbomify.com/CVE-2016-5399/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-5399
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-5399
- OSV: https://osv.dev/vulnerability/CVE-2016-5399

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-5399/
Summaries are generated and may contain mistakes; the official description above is the record.