Ubuntu 14.04 LTS / 16.04 LTS : Irssi vulnerabilities (USN-3465-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3465-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(104212);
  script_version("3.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id(
    "CVE-2017-10965",
    "CVE-2017-10966",
    "CVE-2017-15227",
    "CVE-2017-15228",
    "CVE-2017-15721",
    "CVE-2017-15722",
    "CVE-2017-15723"
  );
  script_xref(name:"USN", value:"3465-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : Irssi vulnerabilities (USN-3465-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"Brian Carpenter discovered that Irssi incorrectly handled messages
with invalid time stamps. A malicious IRC server could use this issue
to cause Irssi to crash, resulting in a denial of service.
(CVE-2017-10965)

Brian Carpenter discovered that Irssi incorrectly handled the internal
nick list. A malicious IRC server could use this issue to cause Irssi
to crash, resulting in a denial of service. (CVE-2017-10966)

Joseph Bisch discovered that Irssi incorrectly removed destroyed
channels from the query list. A malicious IRC server could use this
issue to cause Irssi to crash, resulting in a denial of service.
(CVE-2017-15227)

Hanno Bock discovered that Irssi incorrectly handled themes. If a
user were tricked into using a malicious theme, a attacker could use
this issue to cause Irssi to crash, resulting in a denial of service.
(CVE-2017-15228)

Joseph Bisch discovered that Irssi incorrectly handled certain DCC
CTCP messages. A malicious IRC server could use this issue to cause
Irssi to crash, resulting in a denial of service. (CVE-2017-15721)

Joseph Bisch discovered that Irssi incorrectly handled certain channel
IDs. A malicious IRC server could use this issue to cause Irssi to
crash, resulting in a denial of service. (CVE-2017-15722)

Joseph Bisch discovered that Irssi incorrectly handled certain long
nicks or targets. A malicious IRC server could use this issue to cause
Irssi to crash, resulting in a denial of service. (CVE-2017-15723).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-3465-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected irssi and / or irssi-dev 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-2017-10966");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:irssi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:irssi-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2017-2023 Canonical, Inc. / NASL script (C) 2017-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '14.04', 'pkgname': 'irssi', 'pkgver': '0.8.15-5ubuntu3.3'},
    {'osver': '14.04', 'pkgname': 'irssi-dev', 'pkgver': '0.8.15-5ubuntu3.3'},
    {'osver': '16.04', 'pkgname': 'irssi', 'pkgver': '0.8.19-1ubuntu1.5'},
    {'osver': '16.04', 'pkgname': 'irssi-dev', 'pkgver': '0.8.19-1ubuntu1.5'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'irssi / irssi-dev');
}