Ubuntu 6.06 LTS / 7.04 / 7.10 / 8.04 LTS : ruby1.8 vulnerabilities (USN-651-1)

High Nessus Plugin ID 37068


The remote Ubuntu host is missing one or more security-related patches.


Akira Tagoh discovered a vulnerability in Ruby which lead to an integer overflow. If a user or automated system were tricked into running a malicious script, an attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2008-2376)

Laurent Gaffie discovered that Ruby did not properly check for memory allocation failures. If a user or automated system were tricked into running a malicious script, an attacker could cause a denial of service. (CVE-2008-3443)

Keita Yamaguchi discovered several safe level vulnerabilities in Ruby.
An attacker could use this to bypass intended access restrictions.

Keita Yamaguchi discovered that WEBrick in Ruby did not properly validate paths ending with '.'. A remote attacker could send a crafted HTTP request and cause a denial of service. (CVE-2008-3656)

Keita Yamaguchi discovered that the dl module in Ruby did not check the taintness of inputs. An attacker could exploit this vulnerability to bypass safe levels and execute dangerous functions. (CVE-2008-3657)

Luka Treiber and Mitja Kolsek discovered that REXML in Ruby did not always use expansion limits when processing XML documents. If a user or automated system were tricked into open a crafted XML file, an attacker could cause a denial of service via CPU consumption.

Jan Lieskovsky discovered several flaws in the name resolver of Ruby.
A remote attacker could exploit this to spoof DNS entries, which could lead to misdirected traffic. This is a different vulnerability from CVE-2008-1447. (CVE-2008-3905).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

Plugin Details

Severity: High

ID: 37068

File Name: ubuntu_USN-651-1.nasl

Version: $Revision: 1.25 $

Type: local

Agent: unix

Published: 2009/04/23

Modified: 2016/12/05

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.8

Temporal Score: 6.8

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:irb1.8, p-cpe:/a:canonical:ubuntu_linux:libdbm-ruby1.8, p-cpe:/a:canonical:ubuntu_linux:libgdbm-ruby1.8, p-cpe:/a:canonical:ubuntu_linux:libopenssl-ruby1.8, p-cpe:/a:canonical:ubuntu_linux:libreadline-ruby1.8, p-cpe:/a:canonical:ubuntu_linux:libruby1.8, p-cpe:/a:canonical:ubuntu_linux:libruby1.8-dbg, p-cpe:/a:canonical:ubuntu_linux:libtcltk-ruby1.8, p-cpe:/a:canonical:ubuntu_linux:rdoc1.8, p-cpe:/a:canonical:ubuntu_linux:ri1.8, p-cpe:/a:canonical:ubuntu_linux:ruby1.8, p-cpe:/a:canonical:ubuntu_linux:ruby1.8-dev, p-cpe:/a:canonical:ubuntu_linux:ruby1.8-elisp, p-cpe:/a:canonical:ubuntu_linux:ruby1.8-examples, cpe:/o:canonical:ubuntu_linux:6.06:-:lts, cpe:/o:canonical:ubuntu_linux:7.04, cpe:/o:canonical:ubuntu_linux:7.10, cpe:/o:canonical:ubuntu_linux:8.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2008/10/09

Reference Information

CVE: CVE-2008-1447, CVE-2008-2376, CVE-2008-3443, CVE-2008-3655, CVE-2008-3656, CVE-2008-3657, CVE-2008-3790, CVE-2008-3905

BID: 30036, 30131, 30644, 30682, 30802

USN: 651-1

IAVA: 2008-A-0045

CWE: 20, 189, 264, 287, 399