Debian DLA-114-1 : heirloom-mailx security update

2015-03-26T00:00:00
ID DEBIAN_DLA-114.NASL
Type nessus
Reporter Tenable
Modified 2018-07-06T00:00:00

Description

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 oldstable distribution (squeeze), these problems have been fixed in version 12.4-2+deb6u1.

We recommend that you upgrade your heirloom-mailx packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-114-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(82098);
  script_version("1.5");
  script_cvs_date("Date: 2018/07/06 11:26:06");

  script_cve_id("CVE-2004-2771", "CVE-2014-7844");
  script_bugtraq_id(71701, 71704);

  script_name(english:"Debian DLA-114-1 : heirloom-mailx security update");
  script_summary(english:"Checks dpkg output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"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 oldstable distribution (squeeze), these problems have been
fixed in version 12.4-2+deb6u1.

We recommend that you upgrade your heirloom-mailx packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2014/12/msg00017.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/squeeze-lts/heirloom-mailx"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected heirloom-mailx package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:heirloom-mailx");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2014/12/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/26");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2018 Tenable Network Security, Inc.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"6.0", prefix:"heirloom-mailx", reference:"12.4-2+deb6u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");