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Vigil@nce - Perl: denial of service via functions parameters

May 2011 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

An attacker who is authorized to inject parameters in Perl
applications, can create a denial of service.

Severity: 1/4

Creation date: 10/05/2011

Revision date: 11/05/2011

IMPACTED PRODUCTS

 Microsoft Windows - plateform
 Unix - plateform

DESCRIPTION OF THE VULNERABILITY

The Perl environment implements the following functions:
 getpeername (), getsockname (): Socket user
 readdir (), closedir (), readdir (), rewinddir (), tell () and
telldir (): Manipulating Directory

However, if an additional parameter is passed to these functions,
they are trying to read an invalid memory address.

It may be noted that the vector of attack is relatively uncommon.
Moreover, if an attacker can modify the Perl code, it can directly
inject the code to execute.

An attacker who is authorized to inject parameters in Perl
applications, can therefore create a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Perl-denial-of-service-via-functions-parameters-10638


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