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EulerOS 2.0 SP2 : elfutils (EulerOS-SA-2019-1109)

2019-04-02T00:00:00
ID EULEROS_SA-2019-1109.NASL
Type nessus
Reporter This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2019-04-02T00:00:00

Description

According to the versions of the elfutils packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  • An Invalid Memory Address Dereference exists in the function elf_end in libelf in elfutils through v0.174. Although eu-size is intended to support ar files inside ar files, handle_ar in size.c closes the outer ar file before handling all inner entries. The vulnerability allows attackers to cause a denial of service (application crash) with a crafted ELF file.(CVE-2018-18520)

  • An invalid memory address dereference was discovered in dwfl_segment_report_module.c in libdwfl in elfutils through v0.174. The vulnerability allows attackers to cause a denial of service (application crash) with a crafted ELF file, as demonstrated by consider_notes.(CVE-2018-18310)

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.

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

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

if (description)
{
  script_id(123583);
  script_version("1.14");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id(
    "CVE-2018-18310",
    "CVE-2018-18520"
  );

  script_name(english:"EulerOS 2.0 SP2 : elfutils (EulerOS-SA-2019-1109)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  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 elfutils packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :

  - An Invalid Memory Address Dereference exists in the
    function elf_end in libelf in elfutils through v0.174.
    Although eu-size is intended to support ar files inside
    ar files, handle_ar in size.c closes the outer ar file
    before handling all inner entries. The vulnerability
    allows attackers to cause a denial of service
    (application crash) with a crafted ELF
    file.(CVE-2018-18520)

  - An invalid memory address dereference was discovered in
    dwfl_segment_report_module.c in libdwfl in elfutils
    through v0.174. The vulnerability allows attackers to
    cause a denial of service (application crash) with a
    crafted ELF file, as demonstrated by
    consider_notes.(CVE-2018-18310)

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-2019-1109
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bfc1f715");
  script_set_attribute(attribute:"solution", value:
"Update the affected elfutils packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-18520");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:elfutils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:elfutils-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:elfutils-libelf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:elfutils-libelf-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:elfutils-libs");
  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) 2019-2021 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 = ["elfutils-0.163-3.h2",
        "elfutils-devel-0.163-3.h2",
        "elfutils-libelf-0.163-3.h2",
        "elfutils-libelf-devel-0.163-3.h2",
        "elfutils-libs-0.163-3.h2"];

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, "elfutils");
}
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