[ANN] RubyGems 0.9.0 and earlier installation exploit

Problem Description:

RubyGems does not check installation paths for gems before writing


Since RubyGems packages are typically installed using root
permissions, arbitrary files may be overwritten on-disk. This may
lead to denial of service, privilege escalation or remote compromise.


No known workarounds


a) Upgrade to RubyGems 0.9.1

b) Apply one of the following patches

For RubyGems 0.9.0:

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