EulerOS 2.0 SP2 : glibc (EulerOS-SA-2020-1667)

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

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

if (description)
{
  script_id(137509);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/06");

  script_cve_id(
    "CVE-2016-3706",
    "CVE-2018-20796",
    "CVE-2019-1010023",
    "CVE-2019-9192",
    "CVE-2020-10029",
    "CVE-2020-1752"
  );

  script_name(english:"EulerOS 2.0 SP2 : glibc (EulerOS-SA-2020-1667)");

  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):Stack-based buffer
    overflow in the getaddrinfo function in
    sysdeps/posix/getaddrinfo.c in the GNU C Library (aka
    glibc or libc6) allows remote attackers to cause a
    denial of service (crash) via vectors involving hostent
    conversion. NOTE: this vulnerability exists because of
    an incomplete fix for CVE-2013-4458.(CVE-2016-3706)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)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)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)A use-after-free vulnerability
    introduced in glibc upstream version 2.14 was found in
    the way the tilde expansion was carried out. Directory
    paths containing an initial tilde followed by a valid
    username were affected by this issue. A local attacker
    could exploit this flaw by creating a specially crafted
    path that, when processed by the glob function, would
    potentially lead to arbitrary code execution. This was
    fixed in version 2.32.(CVE-2020-1752)The GNU C Library
    (aka glibc or libc6) before 2.32 could overflow an
    on-stack buffer during range reduction if an input to
    an 80-bit long double function contains a non-canonical
    bit pattern, a seen when passing a
    0x5d414141414141410000 value to sinl on x86 targets.
    This is related to
    sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.(CVE-2020-10029)

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-2020-1667
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9a48d1a6");
  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:"2020/06/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/17");

  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 !~ "^(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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["glibc-2.17-111.h49",
        "glibc-common-2.17-111.h49",
        "glibc-devel-2.17-111.h49",
        "glibc-headers-2.17-111.h49",
        "glibc-static-2.17-111.h49",
        "glibc-utils-2.17-111.h49",
        "nscd-2.17-111.h49"];

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, "glibc");
}