| Description: | Summary:
The remote host is missing an update for the Debian 'librack-ruby' package(s) announced via the DSA-2783-1 advisory.
Vulnerability Insight:
Several vulnerabilities were discovered in Rack, a modular Ruby webserver interface. The Common Vulnerabilities and Exposures project identifies the following vulnerabilities:
CVE-2011-5036
Rack computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
CVE-2013-0183
A remote attacker could cause a denial of service (memory consumption and out-of-memory error) via a long string in a Multipart HTTP packet.
CVE-2013-0184
A vulnerability in Rack::Auth::AbstractRequest allows remote attackers to cause a denial of service via unknown vectors.
CVE-2013-0263
Rack::Session::Cookie allows remote attackers to guess the session cookie, gain privileges, and execute arbitrary code via a timing attack involving an HMAC comparison function that does not run in constant time.
For the oldstable distribution (squeeze), these problems have been fixed in version 1.1.0-4+squeeze1.
The stable, testing and unstable distributions do not contain the librack-ruby package. They have already been addressed in version 1.4.1-2.1 of the ruby-rack package.
We recommend that you upgrade your librack-ruby packages.
Affected Software/OS:
'librack-ruby' package(s) on Debian 6.
Solution:
Please install the updated package(s).
CVSS Score:
5.1
CVSS Vector:
AV:N/AC:H/Au:N/C:P/I:P/A:P
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