EulerOS 2.0 SP5 : glibc (EulerOS-SA-2020-1102)

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

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

if (description)
{
  script_id(133903);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/26");

  script_cve_id("CVE-2018-20796", "CVE-2019-1010023", "CVE-2019-9192");

  script_name(english:"EulerOS 2.0 SP5 : glibc (EulerOS-SA-2020-1102)");

  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 :

  - The glibc package contains standard libraries which are
    used by multiple programs on the system. In order to
    save disk space and memory, as well as to make
    upgrading easier, common system code is kept in one
    place and shared between programs. This particular
    package contains the most important sets of shared
    libraries: the standard C library and the standard math
    library. Without these two libraries, a Linux system
    will not function.Security Fix(es):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)GNU
    Libc current is affected by: Re-mapping current loaded
    library with malicious ELF file. The impact is: In
    worst case attacker may evaluate privileges. The
    component is: libld. The attack vector is: Attacker
    sends 2 ELF files to victim and asks to run ldd on it.
    ldd execute code.(CVE-2019-1010023)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)

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-2020-1102
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?785822c5");
  script_set_attribute(attribute:"solution", value:
"Update the affected glibc packages.");
  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:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-1010023");

  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:"2020/02/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/24");

  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 !~ "^(5)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5", "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-2.17-222.h26.eulerosv2r7",
        "glibc-common-2.17-222.h26.eulerosv2r7",
        "glibc-devel-2.17-222.h26.eulerosv2r7",
        "glibc-headers-2.17-222.h26.eulerosv2r7",
        "glibc-static-2.17-222.h26.eulerosv2r7",
        "glibc-utils-2.17-222.h26.eulerosv2r7",
        "nscd-2.17-222.h26.eulerosv2r7"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"5", 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");
}