• [SECURITY] [DSA 3104-1] bsd-mailx security update

    From Florian Weimer@1:229/2 to All on Tue Dec 16 19:00:02 2014
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-3104-1 [email protected] http://www.debian.org/security/ Florian Weimer December 16, 2014 http://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : bsd-mailx
    CVE ID : CVE-2014-7844

    It was discovered that bsd-mailx, an implementation of the "mail"
    command, had an undocumented feature which treats syntactically valid
    email addresses as shell commands to execute.

    Users who need this feature can re-enable it using the "expandaddr" in
    an appropriate mailrc file. This update also removes the obsolete -T
    option. An older security vulnerability, CVE-2004-2771, had already
    been addressed in the Debian's bsd-mailx package.

    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), this problem has been fixed in
    version 8.1.2-0.20111106cvs-1+deb7u1.

    We recommend that you upgrade your bsd-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: [email protected]
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