FreeBSD : Ruby -- Denial of Service and Unsafe Object Creation Vulnerability in JSON (c79eb109-a754-45d7-b552-a42099eb2265)

This script is Copyright (C) 2013 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

Aaron Patterson reports :

When parsing certain JSON documents, the JSON gem can be coerced in to
creating Ruby symbols in a target system. Since Ruby symbols are not
garbage collected, this can result in a denial of service attack.

The same technique can be used to create objects in a target system
that act like internal objects. These 'act alike' objects can be used
to bypass certain security mechanisms and can be used as a spring
board for SQL injection attacks in Ruby on Rails.

See also :

http://www.nessus.org/u?8ecbe481

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 64652 ()

Bugtraq ID:

CVE ID: CVE-2013-0269

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