Debian DLA-1084-1 : libidn 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-1084-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(102923);
  script_version("3.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/24");

  script_cve_id("CVE-2017-14062");

  script_name(english:"Debian DLA-1084-1 : libidn security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It was discovered that there was an integer overflow vulnerability in
libidn's Punycode handling (an encoding used to convert Unicode
characters to ASCII) which would have allowed remote attackers to
cause a denial of service.

For Debian 7 'Wheezy', this issue has been fixed in libidn version
1.25-2+deb7u3.

We recommend that you upgrade your libidn 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/2017/09/msg00000.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/wheezy/libidn");
  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: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:"cvss_score_source", value:"CVE-2017-14062");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:idn");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libidn11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libidn11-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libidn11-java");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2025 Tenable Network Security, Inc.");

  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:"idn", reference:"1.25-2+deb7u3")) flag++;
if (deb_check(release:"7.0", prefix:"libidn11", reference:"1.25-2+deb7u3")) flag++;
if (deb_check(release:"7.0", prefix:"libidn11-dev", reference:"1.25-2+deb7u3")) flag++;
if (deb_check(release:"7.0", prefix:"libidn11-java", reference:"1.25-2+deb7u3")) 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");