Debian DLA-1274-1 : exim4 security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1274-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(106722);
  script_version("3.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id("CVE-2018-6789");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");
  script_xref(name:"CEA-ID", value:"CEA-2020-0129");

  script_name(english:"Debian DLA-1274-1 : exim4 security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"Meh Chang discovered a buffer overflow flaw in a utility function used
in the SMTP listener of Exim, a mail transport agent. A remote
attacker can take advantage of this flaw to cause a denial of service,
or potentially the execution of arbitrary code via a specially crafted
message.

For Debian 7 'Wheezy', this problem has been fixed in version
4.80-7+deb7u6.

We recommend that you upgrade your exim4 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/2018/02/msg00009.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/wheezy/exim4");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected packages.");
  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:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/02/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-config");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-daemon-heavy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-daemon-heavy-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-daemon-light");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-daemon-light-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:eximon4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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:"7.0", prefix:"exim4", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"exim4-base", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"exim4-config", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"exim4-daemon-heavy", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"exim4-daemon-heavy-dbg", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"exim4-daemon-light", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"exim4-daemon-light-dbg", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"exim4-dbg", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"exim4-dev", reference:"4.80-7+deb7u6")) flag++;
if (deb_check(release:"7.0", prefix:"eximon4", reference:"4.80-7+deb7u6")) 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");