Mandriva Linux Security Advisory : ruby (MDVSA-2008:226)
High Nessus Plugin ID 38018
SynopsisThe remote Mandriva Linux host is missing one or more security updates.
DescriptionA 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.
SolutionUpdate the affected packages.