Debian DSA-3898-1 : expat - 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 DSA-3898. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(101035);
  script_version("3.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");

  script_cve_id("CVE-2016-9063", "CVE-2017-9233");
  script_xref(name:"DSA", value:"3898");

  script_name(english:"Debian DSA-3898-1 : expat - 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-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Multiple vulnerabilities have been discovered in Expat, an XML parsing
C library. The Common Vulnerabilities and Exposures project identifies
the following problems :

  - CVE-2016-9063
    Gustavo Grieco discovered an integer overflow flaw
    during parsing of XML. An attacker can take advantage of
    this flaw to cause a denial of service against an
    application using the Expat library.

  - CVE-2017-9233
    Rhodri James discovered an infinite loop vulnerability
    within the entityValueInitProcessor() function while
    parsing malformed XML in an external entity. An attacker
    can take advantage of this flaw to cause a denial of
    service against an application using the Expat library."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2016-9063"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2017-9233"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2016-9063"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/expat"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/expat"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2017/dsa-3898"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the expat packages.

For the oldstable distribution (jessie), these problems have been
fixed in version 2.1.0-6+deb8u4.

For the stable distribution (stretch), these problems have been fixed
in version 2.2.0-2+deb9u1. For the stable distribution (stretch),
CVE-2016-9063 was already fixed before the initial release."
  );
  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_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:U/RL:O/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:expat");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/26");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  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:"8.0", prefix:"expat", reference:"2.1.0-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"lib64expat1", reference:"2.1.0-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"lib64expat1-dev", reference:"2.1.0-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libexpat1", reference:"2.1.0-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libexpat1-dev", reference:"2.1.0-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libexpat1-udeb", reference:"2.1.0-6+deb8u4")) flag++;
if (deb_check(release:"9.0", prefix:"expat", reference:"2.2.0-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"lib64expat1", reference:"2.2.0-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"lib64expat1-dev", reference:"2.2.0-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libexpat1", reference:"2.2.0-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libexpat1-dev", reference:"2.2.0-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libexpat1-udeb", reference:"2.2.0-2+deb9u1")) 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");