CVE-2012-1172

Severity: medium (CVSS 5.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-05-24 · updated 2026-06-16
Weakness: CWE-20

Description

The file-upload implementation in rfc1867.c in PHP before 5.4.0 does not properly handle invalid [ (open square bracket) characters in name values, which makes it easier for remote attackers to cause a denial of service (malformed $_FILES indexes) or conduct directory traversal attacks during multi-file uploads by leveraging a script that lacks its own filename restrictions.

Affected products

PHP: through 5.3.10; 5.0.0, 5.0.0-beta1, 5.0.0-beta2, 5.0.0-beta3, 5.0.0-beta4, 5.0.0-rc1 (+42)

References

http://isisblogs.poly.edu/2011/08/11/php-not-properly-checking-params/
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/080037.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/080041.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/080070.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00011.html
http://marc.info/?l=bugtraq&m=134012830914727&w=2
http://openwall.com/lists/oss-security/2012/03/13/4
http://support.apple.com/kb/HT5501
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_4/main/rfc1867.c?r1=321664&r2=321663&pathrev=321664
http://svn.php.net/viewvc?view=revision&revision=321664

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