Oracle Linux 4 / 5 : ruby (ELSA-2008-0897)

This script is Copyright (C) 2013-2015 Tenable Network Security, Inc.

Synopsis :

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

Description :

From Red Hat Security Advisory 2008:0897 :

Updated ruby packages that fix several security issues are now
available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the
Red Hat Security Response Team.

Ruby is an interpreted scripting language for quick and easy
object-oriented programming.

The Ruby DNS resolver library, resolv.rb, used predictable transaction
IDs and a fixed source port when sending DNS requests. A remote
attacker could use this flaw to spoof a malicious reply to a DNS
query. (CVE-2008-3905)

Ruby's XML document parsing module (REXML) was prone to a denial of
service attack via XML documents with large XML entity definitions
recursion. A specially crafted XML file could cause a Ruby application
using the REXML module to use an excessive amount of CPU and memory.

An insufficient 'taintness' check flaw was discovered in Ruby's DL
module, which provides direct access to the C language functions. An
attacker could use this flaw to bypass intended safe-level
restrictions by calling external C functions with the arguments from
an untrusted tainted inputs. (CVE-2008-3657)

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

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

A denial of service flaw 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)

Users of ruby should upgrade to these updated packages, which contain
backported patches to resolve these issues.

See also :

Solution :

Update the affected ruby packages.

Risk factor :

High / CVSS Base Score : 7.8
CVSS Temporal Score : 6.1
Public Exploit Available : true

Family: Oracle Linux Local Security Checks

Nessus Plugin ID: 67752 ()

Bugtraq ID: 30644

CVE ID: CVE-2008-1145