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Debian Security Advisory DSA 2783-1 (librack-ruby - several vulnerabilities)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.1

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:H/Au:N/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

8 years ago

Modified

Modified

5 months ago

Share

Summary

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.

Affected Software

Affected Software

librack-ruby on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

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.

Common Vulnerabilities and Exposures (CVE)

References

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