CVE-2013-3724
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Descriptions du CVE
The mk_request_header_process function in mk_request.c in Monkey 1.1.1 allows remote attackers to cause a denial of service (thread crash and service outage) via a '\0' character in an HTTP request.
Informations du CVE
Faiblesses connexes
| Nom de la faiblesse | Source | |
|---|---|---|
| Improper Input Validation The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. |
Métriques
| Métriques | Score | Gravité | CVSS Vecteur | Source |
|---|---|---|---|---|
| V2 | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P | nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 25837
Date de publication : 2013-05-29 22h00 +00:00
Auteur : Doug Prostko
EDB Vérifié : No
Title:
======
Monkey HTTPD 1.1.1 - Denial of Service Vulnerability
Date:
=====
2013-05-28
References:
===========
http://bugs.monkey-project.com/ticket/181
Introduction:
=============
Monkey is a lightweight and powerful web server for GNU/Linux.
It has been designed to be very scalable with low memory and CPU consumption, the perfect solution for embedded devices. Made for ARM, x86 and x64.
Abstract:
=========
The vulnerability is a denial of service which is caused by sending a null byte in an HTTP request to the web server.
Report-Timeline:
================
2013-05-23: Discovered vulnerability via fuzzing
2013-05-25: Vendor Notification
2013-05-26: Vendor Response/Feedback
2013-05-27: Vendor Fix/Patch
2013-05-28: PublicDisclosure
Status:
========
Published
Affected Products:
==================
Monkey HTTPD - version 1.1.1
Exploitation-Technique:
=======================
Remote
Details:
========
A bug discovered in Monkey's HTTP parser allows an attacker to cause a segmentation fault in one of the daemon's threads using a specially crafted request containing a null byte. An attacker can crash all the available threads by sending the specially crafted request multiple times, rendering the server useless for legitimate users.
Proof of Concept:
=================
The vulnerability can be exploited by remote attacker without any special privileges. The placement of the null byte within the request does not seem to have any effect on the result. The null byte may even be used instead of an HTTP method such as, GET. Below is an example of how this bug can be manually triggered:
ruby -e 'puts "GET /\x00 HTTP/1.1\r\n\r\n"'|netcat localhost 2001
Solution:
=========
This vulnerability has been fixed for the 1.2.0 release.
Risk:
=====
The security risk of the redirection vulnerability is estimated as low(+).
Credits:
========
Doug Prostko <dougtko[at]gmail[dot]com> - Vulnerability discovery
Products Mentioned
Configuraton 0
Monkey-project>>Monkey >> Version 1.1.1
- Monkey-project>>Monkey >> Version 1.1.1 (Open CPE detail)
