Ubuntu 2547-1: Mono vulnerabilities

    Date24 Mar 2015
    CategoryUbuntu
    64
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in Mono.
    ==========================================================================
    Ubuntu Security Notice USN-2547-1
    March 24, 2015
    
    mono vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.10
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in Mono.
    
    Software Description:
    - mono: Mono is a platform for running and developing applications
    
    Details:
    
    It was discovered that the Mono TLS implementation was vulnerable to the
    SKIP-TLS vulnerability. A remote attacker could possibly use this issue
    to perform client impersonation attacks. (CVE-2015-2318)
    
    It was discovered that the Mono TLS implementation was vulnerable to the
    FREAK vulnerability. A remote attacker or a man in the middle could
    possibly use this issue to force the use of insecure ciphersuites.
    (CVE-2015-2319)
    
    It was discovered that the Mono TLS implementation still supported a
    fallback to SSLv2. This update removes the functionality as use of SSLv2 is
    known to be insecure. (CVE-2015-2320)
    
    It was discovered that Mono incorrectly handled memory in certain
    circumstances. A remote attacker could possibly use this issue to cause
    Mono to crash, resulting in a denial of service, or to obtain sensitive
    information. This issue only applied to Ubuntu 12.04 LTS. (CVE-2011-0992)
    
    It was discovered that Mono incorrectly handled hash collisions. A remote
    attacker could possibly use this issue to cause Mono to crash, resulting in
    a denial of service. This issue only applied to Ubuntu 12.04 LTS.
    (CVE-2012-3543)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.10:
      libmono-2.0-1                   3.2.8+dfsg-4ubuntu2.1
      mono-runtime                    3.2.8+dfsg-4ubuntu2.1
    
    Ubuntu 14.04 LTS:
      libmono-2.0-1                   3.2.8+dfsg-4ubuntu1.1
      mono-runtime                    3.2.8+dfsg-4ubuntu1.1
    
    Ubuntu 12.04 LTS:
      libmono-2.0-1                   2.10.8.1-1ubuntu2.3
      mono-runtime                    2.10.8.1-1ubuntu2.3
    
    After a standard system update you need to restart Mono applications to
    make all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-2547-1
      CVE-2011-0992, CVE-2012-3543, CVE-2015-2318, CVE-2015-2319,
      CVE-2015-2320
    
    Package Information:
      https://launchpad.net/ubuntu/+source/mono/3.2.8+dfsg-4ubuntu2.1
      https://launchpad.net/ubuntu/+source/mono/3.2.8+dfsg-4ubuntu1.1
      https://launchpad.net/ubuntu/+source/mono/2.10.8.1-1ubuntu2.3
    
    
    
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