EulerOS Virtualization 2.5.1 : procps-ng (EulerOS-SA-2018-1326)

2018-10-26T00:00:00
ID EULEROS_SA-2018-1326.NASL
Type nessus
Reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-07-02T00:00:00

Description

According to the versions of the procps-ng package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  • If the HOME environment variable is unset or empty, top will read its configuration file from the current working directory without any security check. If a user runs top with HOME unset in an attacker-controlled directory, the attacker could achieve privilege escalation by exploiting one of several vulnerabilities in the config_file() function.(CVE-2018-1122)

  • Due to incorrect accounting when decoding and escaping Unicode data in procfs, ps is vulnerable to overflowing an mmap()ed region when formatting the process list for display. Since ps maps a guard page at the end of the buffer, impact is limited to a crash.(CVE-2018-1123)

  • If an argument longer than INT_MAX bytes is given to pgrep,

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

include("compat.inc");

if (description)
{
  script_id(118414);
  script_version("1.5");
  script_cvs_date("Date: 2019/06/28 11:31:59");

  script_cve_id(
    "CVE-2018-1122",
    "CVE-2018-1123",
    "CVE-2018-1125"
  );

  script_name(english:"EulerOS Virtualization 2.5.1 : procps-ng (EulerOS-SA-2018-1326)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security
updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the procps-ng package installed, the
EulerOS Virtualization installation on the remote host is affected by
the following vulnerabilities :

  - If the HOME environment variable is unset or empty, top
    will read its configuration file from the current
    working directory without any security check. If a user
    runs top with HOME unset in an attacker-controlled
    directory, the attacker could achieve privilege
    escalation by exploiting one of several vulnerabilities
    in the config_file() function.(CVE-2018-1122)

  - Due to incorrect accounting when decoding and escaping
    Unicode data in procfs, ps is vulnerable to overflowing
    an mmap()ed region when formatting the process list for
    display. Since ps maps a guard page at the end of the
    buffer, impact is limited to a crash.(CVE-2018-1123)

  - If an argument longer than INT_MAX bytes is given to
    pgrep, 'int bytes' could wrap around back to a large
    positive int (rather than approaching zero), leading to
    a stack buffer overflow via strncat().(CVE-2018-1125)

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.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1326
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0902f9e6");
  script_set_attribute(attribute:"solution", value:
"Update the affected procps-ng packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/09/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:procps-ng");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.5.1");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "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");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "2.5.1") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.5.1");
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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["procps-ng-3.3.10-17.2.h2"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", 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, "procps-ng");
}