CVE-2012-4481
First published: Fri Oct 05 2012(Updated: )
Originally, Common Vulnerabilities and Exposures assigned an identifier of <a href="https://access.redhat.com/security/cve/CVE-2011-1005">CVE-2011-1005</a> to the following vulnerability: The safe-level feature in Ruby 1.8.6 through 1.8.6-420, 1.8.7 through 1.8.7-330, and 1.8.8dev allows context-dependent attackers to modify strings via the Exception#to_s method, as demonstrated by changing an intended pathname. with the following upstream patch: [1] <a href="http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?revision=30903&view=revision">http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?revision=30903&view=revision</a> Based on later upstream patch for different (<a href="https://access.redhat.com/security/cve/CVE-2012-4464">CVE-2012-4464</a> and <a href="https://access.redhat.com/security/cve/CVE-2012-4466">CVE-2012-4466</a>) issues: [2] <a href="http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37068">http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37068</a> it was found that original upstream 1.8.x ruby patch for <a href="https://access.redhat.com/security/cve/CVE-2011-1005">CVE-2011-1005</a> issue was not complete, when the NameError#to_s() method was used on / with Ruby objects (the test logic in 'test_to_s_taintness_propagation' test from [1] was actually reversed, so the test returned success also on still vulnerable instances). Acknowledgements: This issue was discovered by Vit Ondruch of Red Hat.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ruby | =1.8.7 |
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Reference Links
- http://rhn.redhat.com/errata/RHSA-2013-0129.html
- http://rhn.redhat.com/errata/RHSA-2013-0612.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:124
- http://www.openwall.com/lists/oss-security/2012/10/05/4
- https://bugzilla.redhat.com/show_bug.cgi?id=863484
- https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0294
- https://access.redhat.com/security/cve/CVE-2011-1005
- http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?revision=30903&view=revision
- https://access.redhat.com/security/cve/CVE-2012-4464
- https://access.redhat.com/security/cve/CVE-2012-4466
- http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37068
- http://www.openwall.com/lists/oss-security/2012/10/05/2
- https://rhn.redhat.com/errata/RHSA-2013-0129.html
- https://rhn.redhat.com/errata/RHSA-2013-0612.html
Frequently Asked Questions
What is the severity of CVE-2012-4481?
CVE-2012-4481 is considered a moderate severity vulnerability.
How do I fix CVE-2012-4481?
To fix CVE-2012-4481, upgrade Ruby to version 1.8.7-331 or later.
What software versions are affected by CVE-2012-4481?
CVE-2012-4481 affects Ruby versions 1.8.6 through 1.8.6-420, 1.8.7 through 1.8.7-330, and 1.8.8dev.
What type of vulnerability is CVE-2012-4481?
CVE-2012-4481 is a vulnerability related to the safe-level feature in Ruby.
Is CVE-2012-4481 still a concern for my applications?
If you are using an affected version of Ruby, CVE-2012-4481 remains a concern for security in your applications.
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