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Rack Multiple Denial of Service Vulnerabilities

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Release Date:  2013-01-16    Views:  1,525

Secunia Advisory SA51815

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Multiple vulnerabilities have been reported in Rack, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) The vulnerability is caused due to an error in regular expressions engine used by Ruby while parsing content with a certain content-disposition header and can be exploited to trigger an infinite loop.

2) The vulnerability is caused due to an unspecified error in Rack::Auth::AbstractRequest class and can be exploited to render the application unusable.

3) The vulnerability is caused due to an unspecified error when processing long strings and can be exploited to trigger an out-of-memory condition.

The vulnerabilities are reported in versions prior to 1.1.5, 1.2.7, 1.3.9, and 1.4.4.


Solution:
Update to version 1.1.5, 1.2.7, 1.3.9, or 1.4.4.

Provided and/or discovered by:
1) Paul Rogers
2, 3) Reported by the vendor

Original Advisory:
Rack:
https://groups.google.com/forum/#!msg/rack-devel/1w4_fWEgTdI/XAkSNHjtdTsJ
https://groups.google.com/forum/#!topic/rack-devel/ImYOqcGiksw/discussion
https://groups.google.com/forum/#!topic/rack-devel/-MWPHDeGWtI/discussion

RedHat Bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=895277
https://bugzilla.redhat.com/show_bug.cgi?id=895282
https://bugzilla.redhat.com/show_bug.cgi?id=895384

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

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