Debian: DSA-2452-1: apache2 security update

    Date15 Apr 2012
    CategoryDebian
    35
    Posted ByLinuxSecurity Advisories
    Niels Heinen noticed a security issue with the default Apache configuration on Debian if certain scripting modules like mod_php or mod_rivet are installed. The problem arises because the directory /usr/share/doc, which is mapped to the URL /doc, may contain example
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-2452-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                            Stefan Fritsch
    April 15, 2012                         http://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : apache2
    Vulnerability  : insecure default configuration
    Problem type   : local/remote
    Debian-specific: yes
    CVE ID         : CVE-2012-0216
    
    Niels Heinen noticed a security issue with the default Apache
    configuration on Debian if certain scripting modules like mod_php or
    mod_rivet are installed. The problem arises because the directory
    /usr/share/doc, which is mapped to the URL /doc, may contain example
    scripts that can be executed by requests to this URL. Although access
    to the URL /doc is restricted to connections from localhost, this still
    creates security issues in two specific configurations:
    
    - - If some front-end server on the same host forwards connections to an
      apache2 backend server on the localhost address, or
    
    - - if the machine running apache2 is also used for web browsing.
    
    Systems not meeting one of these two conditions are not known to be
    vulnerable. The actual security impact depends on which packages (and
    accordingly which example scripts) are installed on the system.
    Possible issues include cross site scripting, code execution, or
    leakage of sensitive data.
    
    This updates removes the problematic configuration sections from the
    files /etc/apache2/sites-available/default and .../default-ssl. When
    upgrading, you should not blindly allow dpkg to replace those files,
    though. Rather you should merge the changes, namely the removal of the
    'Alias /doc "/usr/share/doc"' line and the related '' block, into your versions of these config files.
    You may also want to check if you have copied these sections to any
    additional virtual host configurations.
    
    For the stable distribution (squeeze), this problem has been fixed in
    version 2.2.16-6+squeeze7.
    
    For the testing distribution (wheezy), this problem will be fixed in
    version 2.2.22-4.
    
    For the unstable distribution (sid), this problem will be fixed in
    version 2.2.22-4.
    
    For the experimental distribution, this problem has been fixed in
    version 2.4.1-3.
    
    We recommend that you upgrade your apache2 packages and adjust your
    configuration.
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: http://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    
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