Debian DSA-2809-1 : ruby1.8 - several vulnerabilities

medium Nessus Plugin ID 71220


The remote Debian host is missing a security-related update.


Several vulnerabilities have been discovered in the interpreter for the Ruby language. The Common Vulnerabilities and Exposures project identifies the following problems :

- CVE-2013-1821 Ben Murphy discovered that unrestricted entity expansion in REXML can lead to a Denial of Service by consuming all host memory.

- CVE-2013-4073 William (B.J.) Snow Orvis discovered a vulnerability in the hostname checking in Ruby's SSL client that could allow man-in-the-middle attackers to spoof SSL servers via a crafted certificate issued by a trusted certification authority.

- CVE-2013-4164 Charlie Somerville discovered that Ruby incorrectly handled floating point number conversion. If an application using Ruby accepted untrusted input strings and converted them to floating point numbers, an attacker able to provide such input could cause the application to crash or, possibly, execute arbitrary code with the privileges of the application.


Upgrade the ruby1.8 packages.

For the oldstable distribution (squeeze), these problems have been fixed in version

For the stable distribution (wheezy), these problems have been fixed in version

See Also

Plugin Details

Severity: Medium

ID: 71220

File Name: debian_DSA-2809.nasl

Version: 1.13

Type: local

Agent: unix

Published: 12/5/2013

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information


Risk Factor: Medium

Score: 6.6


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:ruby1.8, cpe:/o:debian:debian_linux:6.0, cpe:/o:debian:debian_linux:7.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/4/2013

Reference Information

CVE: CVE-2013-1821, CVE-2013-4073, CVE-2013-4164

BID: 58141, 60843, 63873

DSA: 2809