Ubuntu 1158-1: curl vulnerabilities

    Date23 Jun 2011
    CategoryUbuntu
    45
    Posted ByLinuxSecurity Advisories
    Multiple vulnerabilities in curl.
    ==========================================================================
    Ubuntu Security Notice USN-1158-1
    June 24, 2011
    
    curl vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 11.04
    - Ubuntu 10.10
    - Ubuntu 10.04 LTS
    - Ubuntu 8.04 LTS
    
    Summary:
    
    Multiple vulnerabilities in curl.
    
    Software Description:
    - curl: HTTP, HTTPS, and FTP client and client libraries
    
    Details:
    
    Richard Silverman discovered that when doing GSSAPI authentication,
    libcurl unconditionally performs credential delegation, handing the
    server a copy of the client's security credential. (CVE-2011-2192)
    
    Wesley Miaw discovered that when zlib is enabled, libcurl does not
    properly restrict the amount of callback data sent to an application
    that requests automatic decompression. This might allow an attacker to
    cause a denial of service via an application crash or possibly execute
    arbitrary code with the privilege of the application. This issue only
    affected Ubuntu 8.04 LTS and Ubuntu 10.04 LTS. (CVE-2010-0734)
    
    USN 818-1 fixed an issue with curl's handling of SSL certificates with
    zero bytes in the Common Name. Due to a packaging error, the fix for
    this issue was not being applied during the build. This issue only
    affected Ubuntu 8.04 LTS. We apologize for the error. (CVE-2009-2417)
    
    Original advisory details:
    
     Scott Cantor discovered that curl did not correctly handle SSL
     certificates with zero bytes in the Common Name. A remote attacker
     could exploit this to perform a man in the middle attack to view
     sensitive information or alter encrypted communications.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 11.04:
      libcurl3                        7.21.3-1ubuntu1.2
      libcurl3-gnutls                 7.21.3-1ubuntu1.2
      libcurl3-nss                    7.21.3-1ubuntu1.2
    
    Ubuntu 10.10:
      libcurl3                        7.21.0-1ubuntu1.1
      libcurl3-gnutls                 7.21.0-1ubuntu1.1
    
    Ubuntu 10.04 LTS:
      libcurl3                        7.19.7-1ubuntu1.1
      libcurl3-gnutls                 7.19.7-1ubuntu1.1
    
    Ubuntu 8.04 LTS:
      libcurl3                        7.18.0-1ubuntu2.3
      libcurl3-gnutls                 7.18.0-1ubuntu2.3
    
    After a standard system update you need to restart any applications
    that make use of libcurl to make all the necessary changes.
    
    References:
      CVE-2009-2417, CVE-2010-0734, CVE-2011-2192
    
    Package Information:
      https://launchpad.net/ubuntu/+source/curl/7.21.3-1ubuntu1.2
      https://launchpad.net/ubuntu/+source/curl/7.21.0-1ubuntu1.1
      https://launchpad.net/ubuntu/+source/curl/7.19.7-1ubuntu1.1
      https://launchpad.net/ubuntu/+source/curl/7.18.0-1ubuntu2.3
    
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