Mandriva Linux Security Advisory : ruby (MDVSA-2008:226)

High Nessus Plugin ID 38018


The remote Mandriva Linux host is missing one or more security updates.


A denial of service condition was found in Ruby's regular expression engine. If a Ruby script tried to process a large amount of data via a regular expression, it could cause Ruby to enter an infinite loop and crash (CVE-2008-3443).

A number of flaws were found in Ruby that could allow an attacker to create a carefully crafted script that could allow for the bypass of certain safe-level restrictions (CVE-2008-3655).

A denial of service vulnerability was found in Ruby's HTTP server toolkit, WEBrick. A remote attacker could send a specially crafted HTTP request to a WEBrick server that would cause it to use an excessive amount of CPU time (CVE-2008-3656).

An insufficient taintness check issue was found in Ruby's DL module, a module that provides direct access to the C language functions. This flaw could be used by an attacker to bypass intended safe-level restrictions by calling external C functions with the arguments from an untrusted tainted input (CVE-2008-3657).

A denial of service condition in Ruby's XML document parsing module (REXML) could cause a Ruby application using the REXML module to use an excessive amount of CPU and memory via XML documents with large XML entitity definitions recursion (CVE-2008-3790).

The Ruby DNS resolver library used predictable transaction IDs and a fixed source port when sending DNS requests. This could be used by a remote attacker to spoof a malicious reply to a DNS query (CVE-2008-3905).

The updated packages have been patched to correct these issues.


Update the affected packages.

Plugin Details

Severity: High

ID: 38018

File Name: mandriva_MDVSA-2008-226.nasl

Version: $Revision: 1.14 $

Type: local

Published: 2009/04/23

Modified: 2016/11/28

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Information

CPE: p-cpe:/a:mandriva:linux:ruby, p-cpe:/a:mandriva:linux:ruby-devel, p-cpe:/a:mandriva:linux:ruby-doc, p-cpe:/a:mandriva:linux:ruby-tk, cpe:/o:mandriva:linux:2008.0, cpe:/o:mandriva:linux:2008.1

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/Mandrake/release, Host/Mandrake/rpm-list

Patch Publication Date: 2008/11/06

Reference Information

CVE: CVE-2008-3443, CVE-2008-3655, CVE-2008-3656, CVE-2008-3657, CVE-2008-3790, CVE-2008-3905

MDVSA: 2008:226

CWE: 20, 264, 287, 399