REDHAT-BUG-1118158: Buffer Overflow
First published: Thu Jul 10 2014(Updated: )
A possible stack-based buffer overflow flaw was reported in the Ruby encodes() function from pack.c. From the bug report, this function may be used on data received from a server, and could be triggered remotely. As the affected stack buffer is a static size on the stack, FORTIFY_SOURCE may help mitigate this issue to only be a denial of service. The original report suggests older versions (such as 1.9.3) are not affected. Bug report: <a href="https://bugs.ruby-lang.org/issues/10019">https://bugs.ruby-lang.org/issues/10019</a> CVE request: <a href="http://www.openwall.com/lists/oss-security/2014/07/09/13">http://www.openwall.com/lists/oss-security/2014/07/09/13</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ruby | >1.9.3 |
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Reference Links
- https://bugs.ruby-lang.org/issues/10019
- http://www.openwall.com/lists/oss-security/2014/07/09/13
- https://access.redhat.com/security/cve/CVE-2014-4975
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1118158#c2
- https://bugs.ruby-lang.org/issues/10019#note-6
- http://seclists.org/oss-sec/2014/q3/173
- http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=46778
- http://www.ruby-doc.org/core-1.9.3/Array.html#method-i-pack
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1120856
- https://rhn.redhat.com/errata/RHSA-2014-1914.html
- https://rhn.redhat.com/errata/RHSA-2014-1913.html
- https://rhn.redhat.com/errata/RHSA-2014-1912.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1118158
Frequently Asked Questions
What is the severity of REDHAT-BUG-1118158?
REDHAT-BUG-1118158 is classified as a high severity vulnerability due to the potential for remote exploitation via buffer overflow.
How do I fix REDHAT-BUG-1118158?
To fix REDHAT-BUG-1118158, update your Ruby installation to a version later than 1.9.3 that includes the patch for this vulnerability.
What are the consequences of REDHAT-BUG-1118158 if exploited?
If exploited, REDHAT-BUG-1118158 could allow an attacker to execute arbitrary code on the affected system.
What versions of Ruby are affected by REDHAT-BUG-1118158?
Ruby versions prior to 1.9.3 are affected by REDHAT-BUG-1118158.
Is there a workaround for REDHAT-BUG-1118158?
A potential workaround for REDHAT-BUG-1118158 is to use FORTIFY_SOURCE to improve stack protection, but this does not completely eliminate the risk.
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