Debian DLA-382-1 : sudo 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-382-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(87826);
  script_version("2.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2015-5602");

  script_name(english:"Debian DLA-382-1 : sudo security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"When sudo is configured to allow a user to edit files under a
directory that they can already write to without using sudo, they can
actually edit (read and write) arbitrary files. Daniel Svartman
reported that a configuration like this might be introduced
unintentionally if the editable files are specified using wildcards,
for example :

operator ALL=(root) sudoedit /home/*/*/test.txt

The default behaviour of sudo has been changed so that it does not
allow editing of a file in a directory that the user can write to, or
that is reached by following a symlink in a directory that the user
can write to. These restrictions can be disabled, but this is strongly
discouraged.

For the oldoldstable distribution (squeeze), this has been fixed in
version 1.7.4p4-2.squeeze.6.

For the oldstable distribution (wheezy) and the stable distribution
(jessie), this will be fixed soon.

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/2016/01/msg00005.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/squeeze-lts/sudo"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected sudo, and sudo-ldap packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2016/01/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/11");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 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:"sudo", reference:"1.7.4p4-2.squeeze.6")) flag++;
if (deb_check(release:"6.0", prefix:"sudo-ldap", reference:"1.7.4p4-2.squeeze.6")) 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");