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nessusThis script is Copyright (C) 2020-2022 and is owned by Tenable, Inc. or an Affiliate thereof.EULEROS_SA-2020-2380.NASL
HistoryNov 03, 2020 - 12:00 a.m.

EulerOS 2.0 SP2 : perl (EulerOS-SA-2020-2380)

2020-11-0300:00:00
This script is Copyright (C) 2020-2022 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
24

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

  • Heap-based buffer overflow in the pack function in Perl before 5.26.2 allows context-dependent attackers to execute arbitrary code via a large item count.(CVE-2018-6913)

  • regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls.(CVE-2020-12723)

  • Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer overflow.(CVE-2020-10543)

  • Perl before 5.30.3 has an integer overflow related to mishandling of a ‘PL_regkind[OP(n)] == NOTHING’ situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection.(CVE-2020-10878)

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(142313);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id(
    "CVE-2018-6913",
    "CVE-2020-10543",
    "CVE-2020-10878",
    "CVE-2020-12723"
  );
  script_xref(name:"CEA-ID", value:"CEA-2021-0004");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");

  script_name(english:"EulerOS 2.0 SP2 : perl (EulerOS-SA-2020-2380)");

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

  - Heap-based buffer overflow in the pack function in Perl
    before 5.26.2 allows context-dependent attackers to
    execute arbitrary code via a large item
    count.(CVE-2018-6913)

  - regcomp.c in Perl before 5.30.3 allows a buffer
    overflow via a crafted regular expression because of
    recursive S_study_chunk calls.(CVE-2020-12723)

  - Perl before 5.30.3 on 32-bit platforms allows a
    heap-based buffer overflow because nested regular
    expression quantifiers have an integer
    overflow.(CVE-2020-10543)

  - Perl before 5.30.3 has an integer overflow related to
    mishandling of a 'PL_regkind[OP(n)] == NOTHING'
    situation. A crafted regular expression could lead to
    malformed bytecode with a possibility of instruction
    injection.(CVE-2020-10878)

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-2020-2380
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4da5e9e2");
  script_set_attribute(attribute:"solution", value:
"Update the affected perl packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/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:N/S:U/C:H/I:H/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-2020-10878");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2018-6913");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"patch_publication_date", value:"2020/11/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/11/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:perl-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:perl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:perl-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:perl-macros");
  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) 2020-2022 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 = ["perl-5.16.3-285.h8",
        "perl-core-5.16.3-285.h8",
        "perl-devel-5.16.3-285.h8",
        "perl-libs-5.16.3-285.h8",
        "perl-macros-5.16.3-285.h8"];

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_HOLE,
    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, "perl");
}
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