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Bug 799275 - (CVE-2012-1098) CVE-2012-1098 rubygem-activesupport: XSS in SafeBuffer#[] (unescaped safe buffers can be marked as safe)
CVE-2012-1098 rubygem-activesupport: XSS in SafeBuffer#[] (unescaped safe buf...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20120301,repor...
: Security
Depends On: 799279 800000 800015 800018 809588
Blocks: 755014 767033
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Reported: 2012-03-02 05:55 EST by Jan Lieskovsky
Modified: 2016-03-04 06:41 EST (History)
9 users (show)

See Also:
Fixed In Version: rubygem-activesupport 3.0.12, rubygem-activesupport 3.1.4, rubygem-activesupport 3.2.2
Doc Type: Bug Fix
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Last Closed: 2012-08-24 11:24:30 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Jan Lieskovsky 2012-03-02 05:55:18 EST
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] http://weblog.rubyonrails.org/2012/3/1/ann-rails-3-0-12-has-been-released
[2] http://groups.google.com/group/rubyonrails-security/browse_thread/thread/edd28f1e3d04e913
[3] https://bugs.gentoo.org/show_bug.cgi?id=406547

Proposed upstream patches:
[4] http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-0-safe-buffer-slice.patch?part=3
    (against v3.0 branch)
[5] http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-1-safe-buffer-slice.patch?part=4
    (against v3.1 branch)
[6] http://groups.google.com/group/rubyonrails-security/attach/1c2e01a5e42722c9/3-2-safe-buffer-slice.patch?part=5
    (against v3.2 branch)
Comment 2 Jan Lieskovsky 2012-03-02 06:25:50 EST
Created rubygem-actionpack tracking bugs for this issue

Affects: fedora-all [bug 799279]
Comment 3 Jan Lieskovsky 2012-03-02 06:37:43 EST
CVE request:
[7] http://www.openwall.com/lists/oss-security/2012/03/02/6
Comment 4 Kurt Seifried 2012-03-02 19:32:17 EST
Added CVE as per http://www.openwall.com/lists/oss-security/2012/03/03/1
Comment 5 Jan Lieskovsky 2012-03-05 10:22:28 EST
This issue affects the version of the rubygem-activesupport package, as shipped with Fedora release of 16. Please schedule an update.

--

This issue did NOT affect the version of the rubygem-activesupport package, as shipped with Fedora 15.

This issue did NOT affect the versions of the rubygem-activesupport package, as shipped with Fedora EPEL 6 and Fedora EPEL 5.
Comment 6 Jan Lieskovsky 2012-03-05 10:25:00 EST
Created rubygem-activesupport tracking bugs for this issue

Affects: fedora-16 [bug 800000]
Comment 9 Fedora Update System 2012-03-11 13:01:04 EDT
rubygem-actionpack-3.0.11-2.fc17, rubygem-activesupport-3.0.11-3.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 Fedora Update System 2012-03-17 19:40:49 EDT
rubygem-actionpack-3.0.10-3.fc16, rubygem-activesupport-3.0.10-2.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

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