The remote Redhat Enterprise Linux 6 / 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2014:1999 advisory.

    The mailx packages contain a mail user agent that is used to manage mail     using scripts.

    A flaw was found in the way mailx handled the parsing of email addresses.
    A syntactically valid email address could allow a local attacker to cause     mailx to execute arbitrary shell commands through shell meta-characters and     the direct command execution functionality. (CVE-2004-2771, CVE-2014-7844)

    Note: Applications using mailx to send email to addresses obtained from     untrusted sources will still remain vulnerable to other attacks if they     accept email addresses which start with - (so that they can be confused     with mailx options). To counteract this issue, this update also introduces     the -- option, which will treat the remaining command line arguments as     email addresses.

    All mailx users are advised to upgrade to these updated packages, which     contain backported patches to correct these issues.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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RHEL 6 / 7 : mailx (RHSA-2014:1999)

high Nessus Plugin ID 80074

Version 1.18