EulerOS 2.0 SP3 : glibc (EulerOS-SA-2020-1388)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

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

if (description)
{
  script_id(135517);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/18");

  script_cve_id(
    "CVE-2016-10739",
    "CVE-2018-20796",
    "CVE-2019-19126",
    "CVE-2019-9192"
  );

  script_name(english:"EulerOS 2.0 SP3 : glibc (EulerOS-SA-2020-1388)");

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

  - In the GNU C Library (aka glibc or libc6) through 2.29,
    check_dst_limits_calc_pos_1 in posix/regexec.c has
    Uncontrolled Recursion, as demonstrated by
    '(\227|)(\\1\\1|t1|\\\2537)+' in grep.(CVE-2018-20796)

  - In the GNU C Library (aka glibc or libc6) through 2.29,
    check_dst_limits_calc_pos_1 in posix/regexec.c has
    Uncontrolled Recursion, as demonstrated by
    '(|)(\\1\\1)*' in grep, a different issue than
    CVE-2018-20796. NOTE: the software maintainer disputes
    that this is a vulnerability because the behavior
    occurs only with a crafted pattern.(CVE-2019-9192)

  - On the x86-64 architecture, the GNU C Library (aka
    glibc) before 2.31 fails to ignore the
    LD_PREFER_MAP_32BIT_EXEC environment variable during
    program execution after a security transition, allowing
    local attackers to restrict the possible mapping
    addresses for loaded libraries and thus bypass ASLR for
    a setuid program.(CVE-2019-19126)

  - In the GNU C Library (aka glibc or libc6) through 2.28,
    the getaddrinfo function would successfully parse a
    string that contained an IPv4 address followed by
    whitespace and arbitrary characters, which could lead
    applications to incorrectly assume that it had parsed a
    valid string, without the possibility of embedded HTTP
    headers or other potentially dangerous
    substrings.(CVE-2016-10739)

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-2020-1388
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?257b845d");
  script_set_attribute(attribute:"solution", value:
"Update the affected glibc packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-10739");

  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:"2020/04/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:glibc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:glibc-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:glibc-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:glibc-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:glibc-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:glibc-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:nscd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  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) 2020-2024 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 !~ "^(3)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP3");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP3", "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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["glibc-2.17-196.h33",
        "glibc-common-2.17-196.h33",
        "glibc-devel-2.17-196.h33",
        "glibc-headers-2.17-196.h33",
        "glibc-static-2.17-196.h33",
        "glibc-utils-2.17-196.h33",
        "nscd-2.17-196.h33"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"3", 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, "glibc");
}