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Vigil@nce - Perl HTTP-Body-Multipart: command injection

October 2013 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can use a special filename, which is not filtered by Perl HTTP::Body::Multipart, in order to execute shell commands.

Impacted products: Unix (platform)

Severity: 2/4

Creation date: 08/10/2013

DESCRIPTION OF THE VULNERABILITY

The Perl HTTP::Body::Multipart module decodes HTTP replies containing several MIME parts, which are for example files.

The header of the MIME part can indicate the name of the file contained in the block. However, HTTP::Body::Multipart does not filter characters contained in this filename. If the filename is directly used in a shell command, it can force the execution of sub-commands.

An attacker can therefore use a special filename, which is not filtered by Perl HTTP::Body::Multipart, in order to execute shell commands.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/P...




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