Issued:
2011-06-28
Updated:
2011-06-28

RHSA-2011:0909 - Moderate: ruby security update

Synopsis

Moderate: ruby security update

Type/Severity

Security Advisory Moderate

Topic

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

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Description

Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks.

A flaw was found in the way large amounts of memory were allocated on 64-bit systems when using the BigDecimal class. A context-dependent attacker could use this flaw to cause memory corruption, causing a Ruby application that uses the BigDecimal class to crash or, possibly, execute arbitrary code. This issue did not affect 32-bit systems. (CVE-2011-0188)

A race condition flaw was found in the remove system entries method in the FileUtils module. If a local user ran a Ruby script that uses this method, a local attacker could use this flaw to delete arbitrary files and directories accessible to that user via a symbolic link attack. (CVE-2011-1004)

It was found that WEBrick (the Ruby HTTP server toolkit) did not filter terminal escape sequences from its log files. A remote attacker could use specially-crafted HTTP requests to inject terminal escape sequences into the WEBrick log files. If a victim viewed the log files with a terminal emulator, it could result in control characters being executed with the privileges of that user. (CVE-2009-4492)

A cross-site scripting (XSS) flaw was found in the way WEBrick displayed error pages. A remote attacker could use this flaw to perform a cross-site scripting attack against victims by tricking them into visiting a specially-crafted URL. (CVE-2010-0541)

A flaw was found in the method for translating an exception message into a string in the Exception class. A remote attacker could use this flaw to bypass safe level 4 restrictions, allowing untrusted (tainted) code to modify arbitrary, trusted (untainted) strings, which safe level 4 restrictions would otherwise prevent. (CVE-2011-1005)

Red Hat would like to thank Drew Yao of Apple Product Security for reporting the CVE-2011-0188 and CVE-2010-0541 issues.

All Ruby users should upgrade to these updated packages, which contain backported patches to resolve these issues.

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.6ia64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.6i386
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux for Power, big endian - Extended Update Support5.6ppc
Red Hat Enterprise Linux for IBM z Systems5s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support5.6s390x
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Server - Extended Update Support from RHUI5.6x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI5.6i386
Red Hat Enterprise Linux Server - AUS5.6x86_64
Red Hat Enterprise Linux Server - AUS5.6ia64
Red Hat Enterprise Linux Server - AUS5.6i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • ruby-devel-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-tcltk-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-1.8.5-19.el5_6.1.src.rpm
  • ruby-mode-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-ri-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-docs-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-mode-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-rdoc-1.8.5-19.el5_6.1.i386.rpm
  • ruby-tcltk-1.8.5-19.el5_6.1.i386.rpm
  • ruby-rdoc-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-libs-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-ri-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-1.8.5-19.el5_6.1.i386.rpm
  • ruby-libs-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-mode-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-ri-1.8.5-19.el5_6.1.i386.rpm
  • ruby-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-libs-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-libs-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-devel-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-irb-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-libs-1.8.5-19.el5_6.1.i386.rpm
  • ruby-rdoc-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-irb-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-docs-1.8.5-19.el5_6.1.i386.rpm
  • ruby-rdoc-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-devel-1.8.5-19.el5_6.1.s390.rpm
  • ruby-devel-1.8.5-19.el5_6.1.ppc64.rpm
  • ruby-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-rdoc-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-tcltk-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-docs-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-ri-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-irb-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-devel-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-docs-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-libs-1.8.5-19.el5_6.1.ppc64.rpm
  • ruby-irb-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-devel-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-docs-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-mode-1.8.5-19.el5_6.1.i386.rpm
  • ruby-libs-1.8.5-19.el5_6.1.s390.rpm
  • ruby-tcltk-1.8.5-19.el5_6.1.ia64.rpm
  • ruby-ri-1.8.5-19.el5_6.1.x86_64.rpm
  • ruby-irb-1.8.5-19.el5_6.1.i386.rpm
  • ruby-tcltk-1.8.5-19.el5_6.1.ppc.rpm
  • ruby-mode-1.8.5-19.el5_6.1.s390x.rpm
  • ruby-devel-1.8.5-19.el5_6.1.i386.rpm

Fixes

CVEs

References

Additional information