Debian: DSA-3105-1: heirloom-mailx security update

    Date16 Dec 2014
    CategoryDebian
    36
    Posted ByLinuxSecurity Advisories
    Two security vulnerabilities were discovered in Heirloom mailx, an implementation of the "mail" command: CVE-2004-2771
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    Debian Security Advisory DSA-3105-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                            Florian Weimer
    December 16, 2014                      http://www.debian.org/security/faq
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    Package        : heirloom-mailx
    CVE ID         : CVE-2004-2771 CVE-2014-7844
    
    Two security vulnerabilities were discovered in Heirloom mailx, an
    implementation of the "mail" command:
    
    CVE-2004-2771
    
        mailx interprets interprets shell meta-characters in certain email
        addresses.
    
    CVE-2014-7844
    
        An unexpected feature of mailx treats syntactically valid email
        addresses as shell commands to execute.
    
    Shell command execution can be re-enabled using the "expandaddr"
    option.
    
    Note that this security update does not remove all mailx facilities
    for command execution, though.  Scripts which send mail to addresses
    obtained from an untrusted source (such as a web form) should use the
    "--" separator before the email addresses (which was fixed to work
    properly in this update), or they should be changed to invoke
    "mail -t" or "sendmail -i -t" instead, passing the recipient addresses
    as part of the mail header.
    
    For the stable distribution (wheezy), these problems have been fixed in
    version 12.5-2+deb7u1.
    
    We recommend that you upgrade your heirloom-mailx packages.
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://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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