# CVE-2015-0231: Use after free in n/a

> Remote attackers can execute arbitrary code via crafted serialized data due to a use-after-free flaw in PHP's unserializer.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Jan 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-5394-7mcx-63pv, UBUNTU-CVE-2015-0231

## What is CVE-2015-0231?

CVE-2015-0231 is a high-severity use after free vulnerability in Php Php, published on 27 Jan 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.37, 5.5.x before 5.5.21, and 5.6.x before 5.6.5 allows remote attackers to execute arbitrary code via a crafted unserialize call that leverages improper handling of duplicate numerical keys within the serialized properties of an object.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-8142.

## Which versions are affected by CVE-2015-0231?

It affects 1 product.


Products: Php Php.

## How do I fix CVE-2015-0231?

Upgrade to a fixed version.

## Is CVE-2015-0231 being exploited?

There is no known exploitation of CVE-2015-0231 in the wild and no public exploit code.

Public exploit code:

- php_cve-2014-8142_cve-2015-0231的漏洞环境docker (github_poc): https://github.com/3xp10it/php_cve-2014-8142_cve-2015-0231

## 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-2015-0231 and fix it if it is affected.

What it is: CVE-2015-0231 is a high-severity use after free vulnerability in Php Php, published on 27 Jan 2015. 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-2015-0231 in the wild and no public exploit code.

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-2015-0231/ (Markdown: https://insights.sbomify.com/CVE-2015-0231/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-0231
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-0231
- OSV: https://osv.dev/vulnerability/CVE-2015-0231

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-0231/
Summaries are generated and may contain mistakes; the official description above is the record.