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AUSCERT Security Bulletin
ASB-2013.0028
A number of vulnerabilities have been identified in Ruby
25 February 2013
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AusCERT Security Bulletin Summary
---------------------------------
Product: Ruby
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2013-0269
Member content until: Wednesday, March 27 2013
OVERVIEW
A number of vulnerabilities have been identified in Ruby prior to
versions 1.9.3 patchlevel 392 and 2.0.0 patchlevel 0. [1, 2]
IMPACT
The vendor has provided the following details regarding these
vulnerabilities:
"Unrestricted entity expansion can lead to a DoS vulnerability in
REXML." [1]
"There is a denial of service and unsafe object creation
vulnerability in the json bundled with ruby. This vulnerability has
been assigned the CVE identifier CVE-2013-0269." [2]
MITIGATION
The vendor recommends updating to the latest version of Ruby to
correct these issues. [1, 2]
REFERENCES
[1] Entity expansion DoS vulnerability in REXML (XML bomb)
http://www.ruby-lang.org/en/news/2013/02/22/rexml-dos-2013-02-22/
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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