EulerOS 2.0 SP2 : ncurses (EulerOS-SA-2018-1006)

2018-01-19T00:00:00
ID EULEROS_SA-2018-1006.NASL
Type nessus
Reporter Tenable
Modified 2018-11-13T00:00:00

Description

According to the version of the ncurses packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  • Stack-based buffer overflow in the _nc_write_entry function in tinfo/write_entry.c in ncurses 6.0 allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted terminfo file, as demonstrated by tic.(CVE-2017-16879)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(106147);
  script_version("3.8");
  script_cvs_date("Date: 2018/11/13 12:30:47");

  script_cve_id(
    "CVE-2017-16879"
  );

  script_name(english:"EulerOS 2.0 SP2 : ncurses (EulerOS-SA-2018-1006)");
  script_summary(english:"Checks the rpm output for the updated package.");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to the version of the ncurses packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerability :

  - Stack-based buffer overflow in the _nc_write_entry
    function in tinfo/write_entry.c in ncurses 6.0 allows
    attackers to cause a denial of service (application
    crash) or possibly execute arbitrary code via a crafted
    terminfo file, as demonstrated by tic.(CVE-2017-16879)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huawei.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1006
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5de9ee04");
  script_set_attribute(attribute:"solution", value:
"Update the affected ncurses package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:L/AC:L/PR:N/UI:R/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:"patch_publication_date", value:"2018/01/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ncurses");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ncurses-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ncurses-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ncurses-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ncurses-term");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/19");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");

sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "EulerOS UVP " + uvp);

if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

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

flag = 0;

pkgs = ["ncurses-5.9-13.20130511.h1",
        "ncurses-base-5.9-13.20130511.h1",
        "ncurses-devel-5.9-13.20130511.h1",
        "ncurses-libs-5.9-13.20130511.h1",
        "ncurses-term-5.9-13.20130511.h1"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"2", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ncurses");
}