7.5 - USN-146-1

Executive Summary

Summary
Title	Ruby vulnerability

Informations
Name	USN-146-1	First vendor Publication	2005-06-29
Vendor	Ubuntu	Last vendor Modification	2005-06-29
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score	7.5	Attack Range	Network
Cvss Impact Score	6.4	Attack Complexity	Low
Cvss Expoit Score	10	Authentication	None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects the following Ubuntu releases:

Ubuntu 4.10 (Warty Warthog) Ubuntu 5.04 (Hoary Hedgehog)

The following packages are affected:

libxmlrpc-ruby1.8 ruby1.8

The problem can be corrected by upgrading the affected package to version 1.8.1+1.8.2pre2-3ubuntu0.2 (for Ubuntu 4.10), or 1.8.1+1.8.2pre4-1ubuntu0.1 (for Ubuntu 5.04). In general, a standard system upgrade is sufficient to effect the necessary changes; however, if you run custom XMLRPC servers implemented in Ruby, you have to restart them.

Details follow:

Nobuhiro IMAI discovered that the changed default value of the Module#public_instance_methods() method broke the security protection of XMLRPC server handlers. A remote attacker could exploit this to execute arbitrary commands on an XMLRPC server.