medium
4.3
CWE
79
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2012-1098: XSS

First published: Fri Mar 02 2012(Updated: )

A cross-site scripting (XSS) flaw was found in the way the String class, used in Ruby on Rails, performed HTML escaping of SafeBuffer objects, when such objects were manipulated directly via '[]' method or other methods, also returning new instances of SafeBuffer object. By using these methods, such newly returned SafeBuffer instances would be inadvertently marked as HTML safe. If a Ruby on Rails application used SafeBuffer objects this way, a remote attacker could provide a specially-crafted input, which once processed by such SafeBuffer instance would pass the HTML escaping test without further filtering, possibly leading to arbitrary HTML or webscript execution. References: [1] <a href="http://weblog.rubyonrails.org/2012/3/1/ann-rails-3-0-12-has-been-released">http://weblog.rubyonrails.org/2012/3/1/ann-rails-3-0-12-has-been-released</a> [2] <a href="http://groups.google.com/group/rubyonrails-security/browse_thread/thread/edd28f1e3d04e913">http://groups.google.com/group/rubyonrails-security/browse_thread/thread/edd28f1e3d04e913</a> [3] <a href="https://bugs.gentoo.org/show_bug.cgi?id=406547">https://bugs.gentoo.org/show_bug.cgi?id=406547</a> Proposed upstream patches: [4] <a href="http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-0-safe-buffer-slice.patch?part=3">http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-0-safe-buffer-slice.patch?part=3</a> (against v3.0 branch) [5] <a href="http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-1-safe-buffer-slice.patch?part=4">http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-1-safe-buffer-slice.patch?part=4</a> (against v3.1 branch) [6] <a href="http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-2-safe-buffer-slice.patch?part=5">http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-2-safe-buffer-slice.patch?part=5</a> (against v3.2 branch)

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/rubygem-activesupport<3.0.12
3.0.12
redhat/rubygem-activesupport<3.1.4
3.1.4
redhat/rubygem-activesupport<3.2.2
3.2.2
rubygems/activesupport>=3.2.0<3.2.2
3.2.2
rubygems/activesupport>=3.1.0<3.1.4
3.1.4
rubygems/activesupport>=3.0.0<3.0.12
3.0.12
Ruby on Rails=3.0.0
Ruby on Rails=3.0.0-beta
Ruby on Rails=3.0.0-beta2
Ruby on Rails=3.0.0-beta3
Ruby on Rails=3.0.0-beta4
Ruby on Rails=3.0.0-rc
Ruby on Rails=3.0.0-rc2
Ruby on Rails=3.0.1
Ruby on Rails=3.0.1-pre
Ruby on Rails=3.0.2
Ruby on Rails=3.0.2-pre
Ruby on Rails=3.0.3
Ruby on Rails=3.0.4-rc1
Ruby on Rails=3.0.5
Ruby on Rails=3.0.5-rc1
Ruby on Rails=3.0.6
Ruby on Rails=3.0.6-rc1
Ruby on Rails=3.0.6-rc2
Ruby on Rails=3.0.7
Ruby on Rails=3.0.7-rc1
Ruby on Rails=3.0.7-rc2
Ruby on Rails=3.0.8
Ruby on Rails=3.0.8-rc1
Ruby on Rails=3.0.8-rc2
Ruby on Rails=3.0.8-rc3
Ruby on Rails=3.0.8-rc4
Ruby on Rails=3.0.9
Ruby on Rails=3.0.9-rc1
Ruby on Rails=3.0.9-rc2
Ruby on Rails=3.0.9-rc3
Ruby on Rails=3.0.9-rc4
Ruby on Rails=3.0.9-rc5
Ruby on Rails=3.0.10
Ruby on Rails=3.0.10-rc1
Ruby on Rails=3.0.11
Ruby on Rails=3.0.12-rc1
Ruby on Rails=3.0.4
Ruby on Rails=3.1.0
Ruby on Rails=3.1.0-beta1
Ruby on Rails=3.1.0-rc1
Ruby on Rails=3.1.0-rc2
Ruby on Rails=3.1.0-rc3
Ruby on Rails=3.1.0-rc4
Ruby on Rails=3.1.0-rc5
Ruby on Rails=3.1.0-rc6
Ruby on Rails=3.1.0-rc7
Ruby on Rails=3.1.0-rc8
Ruby on Rails=3.1.1
Ruby on Rails=3.1.1-rc1
Ruby on Rails=3.1.1-rc2
Ruby on Rails=3.1.1-rc3
Ruby on Rails=3.1.2
Ruby on Rails=3.1.2-rc1
Ruby on Rails=3.1.2-rc2
Ruby on Rails=3.1.3
Ruby on Rails=3.1.4-rc1
Ruby on Rails=3.2.0
Ruby on Rails=3.2.0-rc1
Ruby on Rails=3.2.0-rc2
Ruby on Rails=3.2.1
Ruby on Rails=3.2.2-rc1

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2012-1098?

    CVE-2012-1098 has been classified as a medium severity vulnerability.

  • How do I fix CVE-2012-1098?

    To fix CVE-2012-1098, update to the fixed versions of the affected package, specifically activesupport 3.0.12, 3.1.4, or 3.2.2.

  • What versions of Ruby on Rails are affected by CVE-2012-1098?

    CVE-2012-1098 affects Ruby on Rails versions 3.0.0 to 3.0.11, 3.1.0 to 3.1.4, and 3.2.0 to 3.2.2.

  • What is the nature of the vulnerability CVE-2012-1098?

    CVE-2012-1098 is a cross-site scripting (XSS) vulnerability due to improper HTML escaping of SafeBuffer objects in Ruby on Rails.

  • Can CVE-2012-1098 be exploited remotely?

    Yes, CVE-2012-1098 can be exploited remotely through crafted input that triggers the XSS flaw.

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