Ubuntu 14.04 LTS / 16.04 LTS : GNU C Library Regression (USN-3239-2)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3239-2. 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(97887);
  script_version("3.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");
  script_xref(name:"USN", value:"3239-2");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : GNU C Library Regression (USN-3239-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by a vulnerability as referenced
in the USN-3239-2 advisory.

    USN-3239-1 fixed vulnerabilities in the GNU C Library. Unfortunately, the fix for CVE-2015-5180 introduced
    an internal ABI change within the resolver library. This update reverts the change. We apologize for the
    inconvenience.

    Please note that long-running services that were restarted to compensate for the USN-3239-1 update may
    need to be restarted again.

    Original advisory details:

    It was discovered that the GNU C Library incorrectly handled the

    strxfrm() function. An attacker could use this issue to cause a denial

    of service or possibly execute arbitrary code. This issue only affected

    Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-8982)

    It was discovered that an integer overflow existed in the

    _IO_wstr_overflow() function of the GNU C Library. An attacker could

    use this to cause a denial of service or possibly execute arbitrary

    code. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04

    LTS. (CVE-2015-8983)

    It was discovered that the fnmatch() function in the GNU C Library

    did not properly handle certain malformed patterns. An attacker could

    use this to cause a denial of service. This issue only affected Ubuntu

    12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-8984)

    Alexander Cherepanov discovered a stack-based buffer overflow in the

    glob implementation of the GNU C Library. An attacker could use this

    to specially craft a directory layout and cause a denial of service.

    (CVE-2016-1234)

    Florian Weimer discovered a NULL pointer dereference in the DNS

    resolver of the GNU C Library. An attacker could use this to cause

    a denial of service. (CVE-2015-5180)

    Michael Petlan discovered an unbounded stack allocation in the

    getaddrinfo() function of the GNU C Library. An attacker could use

    this to cause a denial of service. (CVE-2016-3706)

    Aldy Hernandez discovered an unbounded stack allocation in the sunrpc

    implementation in the GNU C Library. An attacker could use this to

    cause a denial of service. (CVE-2016-4429)

    Tim Ruehsen discovered that the getaddrinfo() implementation in the

    GNU C Library did not properly track memory allocations. An attacker

    could use this to cause a denial of service. This issue only affected

    Ubuntu 16.04 LTS. (CVE-2016-5417)

    Andreas Schwab discovered that the GNU C Library on ARM 32-bit

    platforms did not properly set up execution contexts. An attacker

    could use this to cause a denial of service. (CVE-2016-6323)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-3239-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"Medium");

  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:"2016/06/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/03/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/22");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-armel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-armel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-i386");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-ppc64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-s390");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-x32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-i386");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-pic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-ppc64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-prof");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-s390");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-x32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnss-dns-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnss-files-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:locales");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:locales-all");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:multiarch-support");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nscd");
  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:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:eglibc-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:glibc-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc-dev-bin");
  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) 2017-2024 Canonical, Inc. / NASL script (C) 2017-2024 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': 'eglibc-source', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc-bin', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-armel', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-dev', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-dev-armel', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-dev-ppc64', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-i386', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-pic', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-ppc64', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-prof', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-udeb', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libc6-x32', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libnss-dns-udeb', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'libnss-files-udeb', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'multiarch-support', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '14.04', 'pkgname': 'nscd', 'pkgver': '2.19-0ubuntu6.11'},
    {'osver': '16.04', 'pkgname': 'glibc-source', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc-bin', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-armel', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-dev', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-armel', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-ppc64', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-i386', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-pic', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-ppc64', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-s390', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-udeb', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'libc6-x32', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'locales', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'locales-all', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'multiarch-support', 'pkgver': '2.23-0ubuntu7'},
    {'osver': '16.04', 'pkgname': 'nscd', 'pkgver': '2.23-0ubuntu7'}
];

var flag = 0;
foreach var 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)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'eglibc-source / glibc-source / libc-bin / libc-dev-bin / libc6 / etc');
}