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Servers and applications

CVE-2009-4017

PHP before 5.2.12 and 5.3.x before 5.3.1 does not restrict the number of temporary files created when handling a multipart/form-data POST request, which allows remote attackers to cause a denial of service (resource exhaustion), and makes it easier for remote attackers to exploit local file inclusion vulnerabilities, via multiple requests, related to lack of support for the max_file_uploads…

Severity
Medium 5.0
Published
24 Nov 2009
Last changed
16 Jun 2026
Added to UpHeron
14 Oct 2026
Fixed in
5.2.12
Exploit chance
12% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Allocation without limits (CWE-770)
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Description

PHP before 5.2.12 and 5.3.x before 5.3.1 does not restrict the number of temporary files created when handling a multipart/form-data POST request, which allows remote attackers to cause a denial of service (resource exhaustion), and makes it easier for remote attackers to exploit local file inclusion vulnerabilities, via multiple requests, related to lack of support for the max_file_uploads directive.

From NVD.

Affected software

SoftwareAffected versions
PHPServers and applications · cpe:a:php:php
  • Version 5.3.0
  • Version 5.3.0-rc4
  • Version 5.3.0-rc3
  • Version 5.3.0-rc2
All 10 release lines
  • Every version before 5.2.12
  • Version 5.3.0-alpha1
  • Version 5.3.0-alpha2
  • Version 5.3.0-alpha3
  • Version 5.3.0-beta1
  • Version 5.3.0-rc1
  • Version 5.3.0-rc2
  • Version 5.3.0-rc3
  • Version 5.3.0-rc4
  • Version 5.3.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-4017
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-4017