A problem exists with PHP3 and PHP4 scripts regarding RFC
1867-based file uploads. PHP saves uploaded files in a temporary
directory on the server, using a temporary name that is referenced
as the variable $FOO where "FOO" is the name of the file input tag
in the submitted form. Many PHP scripts process $FOO without taking
measures to ensure that it is in fact a file that resides in the
temporary directory. Because of this, it is possible for a remote
attacker to supply an arbitrary file name as the value for $FOO by
submitting a standard form input tag by that name, and thus cause
the PHP script to process arbitrary files. The vulnerability exists
in various scripts, and not necessarily with PHP itself, as the
script determines what actions to perform on the uploaded file. The
new versions of both PHP3 and PHP4 make it easier to secure scripts
from this particular vulnerability. They include a new function
that makes it easy to determine whether a certain filename is a
temporary uploaded file or not:
/* Text whether a file is an uploaded file or not */
While there is no security vulnerability with PHP3 and PHP4,
this upgrade is offered as a convenience because it includes the
above illustrated method of file testing.
Please verify these md5 checksums of the updates prior to
upgrading to ensure the integrity of the downloaded package. You
can do this by running the md5sum program on the downloaded package
by using "md5sum package.rpm".
Updated packages are available in the "updates/[ver]/RPMS/"
directory. For example, if you are looking for an updated RPM
package for Linux-Mandrake 7.1, look for it in "updates/7.1/RPMS/".
Updated source RPMs are available as well, but you generally do not
need to download them.
Please be aware that sometimes it takes the mirrors a few hours
to update, so if you want an immediate upgrade, please use one of
the two above-listed mirrors.
You can view other security advisories for Linux-Mandrake
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