Ubuntu 1733-1: Ruby vulnerabilities

    Date21 Feb 2013
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in Ruby.
    Ubuntu Security Notice USN-1733-1
    February 21, 2013
    ruby1.9.1 vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 12.10
    - Ubuntu 12.04 LTS
    Several security issues were fixed in Ruby.
    Software Description:
    - ruby1.9.1: Interpreter of object-oriented scripting language Ruby
    Jean-Philippe Aumasson discovered that Ruby incorrectly generated
    predictable hash values. An attacker could use this issue to generate hash
    collisions and cause a denial of service. (CVE-2012-5371)
    Evgeny Ermakov discovered that documentation generated by rdoc is
    vulnerable to a cross-site scripting issue. With cross-site scripting
    vulnerabilities, if a user were tricked into viewing a specially crafted
    page, a remote attacker could exploit this to modify the contents, or steal
    confidential data, within the same domain. (CVE-2013-0256)
    Thomas Hollstegge and Ben Murphy discovered that the JSON implementation
    in Ruby incorrectly handled certain crafted documents. An attacker could
    use this issue to cause a denial of service or bypass certain protection
    mechanisms. (CVE-2013-0269)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 12.10:
    Ubuntu 12.04 LTS:
    In general, a standard system update will make all the necessary changes.
      CVE-2012-5371, CVE-2013-0256, CVE-2013-0269
    Package Information:

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