EulerOS 2.0 SP2 : ruby (EulerOS-SA-2019-2403)

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

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

if (description)
{
  script_id(131895);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/04");

  script_cve_id(
    "CVE-2017-9224",
    "CVE-2017-9226",
    "CVE-2017-9227",
    "CVE-2017-9228"
  );

  script_name(english:"EulerOS 2.0 SP2 : ruby (EulerOS-SA-2019-2403)");

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

  - An issue was discovered in Oniguruma 6.2.0, as used in
    Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP
    through 7.1.5. A stack out-of-bounds read occurs in
    match_at() during regular expression searching. A
    logical error involving order of validation and access
    in match_at() could result in an out-of-bounds read
    from a stack buffer.(CVE-2017-9224)

  - An issue was discovered in Oniguruma 6.2.0, as used in
    Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP
    through 7.1.5. A heap out-of-bounds write or read
    occurs in next_state_val() during regular expression
    compilation. Octal numbers larger than 0xff are not
    handled correctly in fetch_token() and
    fetch_token_in_cc(). A malformed regular expression
    containing an octal number in the form of '\700' would
    produce an invalid code point value larger than 0xff in
    next_state_val(), resulting in an out-of-bounds write
    memory corruption.(CVE-2017-9226)

  - An issue was discovered in Oniguruma 6.2.0, as used in
    Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP
    through 7.1.5. A stack out-of-bounds read occurs in
    mbc_enc_len() during regular expression searching.
    Invalid handling of reg->dmin in forward_search_range()
    could result in an invalid pointer dereference, as an
    out-of-bounds read from a stack buffer.(CVE-2017-9227)

  - An issue was discovered in Oniguruma 6.2.0, as used in
    Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP
    through 7.1.5. A heap out-of-bounds write occurs in
    bitset_set_range() during regular expression
    compilation due to an uninitialized variable from an
    incorrect state transition. An incorrect state
    transition in parse_char_class() could create an
    execution path that leaves a critical local variable
    uninitialized until it's used as an index, resulting in
    an out-of-bounds write memory
    corruption.(CVE-2017-9228)

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-2019-2403
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bde7aae9");
  script_set_attribute(attribute:"solution", value:
"Update the affected ruby 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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-9228");

  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:"2019/12/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ruby-irb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ruby-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) 2019-2024 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 = ["ruby-2.0.0.648-33.h16",
        "ruby-irb-2.0.0.648-33.h16",
        "ruby-libs-2.0.0.648-33.h16"];

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, "ruby");
}