Vulnerabilities > CVE-2019-16254 - Injection vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(132624);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/21");

  script_cve_id(
    "CVE-2019-15845",
    "CVE-2019-16201",
    "CVE-2019-16254",
    "CVE-2019-16255"
  );

  script_name(english:"EulerOS 2.0 SP8 : ruby (EulerOS-SA-2020-1031)");
  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 ruby packages installed, the EulerOS
installation on the remote host is affected by the following
vulnerabilities :

  - Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x
    through 2.6.4 allows code injection if the first
    argument (aka the 'command' argument) to Shell#[] or
    Shell#test in lib/shell.rb is untrusted data. An
    attacker can exploit this to call an arbitrary Ruby
    method.(CVE-2019-16255)

  - Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x
    through 2.6.4 mishandles path checking within
    File.fnmatch functions.(CVE-2019-15845)

  - WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7,
    2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a
    regular expression Denial of Service cause by
    looping/backtracking. A victim must expose a WEBrick
    server that uses DigestAuth to the Internet or a
    untrusted network.(CVE-2019-16201)

  - Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x
    through 2.6.4 allows HTTP Response Splitting. If a
    program using WEBrick inserts untrusted input into the
    response header, an attacker can exploit it to insert a
    newline character to split a header, and inject
    malicious content to deceive clients. NOTE: this issue
    exists because of an incomplete fix for CVE-2017-17742,
    which addressed the CRLF vector, but did not address an
    isolated CR or an isolated LF.(CVE-2019-16254)

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-2020-1031
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?24defaad");
  script_set_attribute(attribute:"solution", value:
"Update the affected ruby 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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/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-2019-16255");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"patch_publication_date", value:"2020/01/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/02");

  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) 2020 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 !~ "^(8)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8", "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 ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

flag = 0;

pkgs = ["ruby-2.5.1-98.h5.eulerosv2r8",
        "ruby-irb-2.5.1-98.h5.eulerosv2r8",
        "ruby-libs-2.5.1-98.h5.eulerosv2r8"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"8", 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, "ruby");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4587. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(132109);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/21");

  script_cve_id("CVE-2019-15845", "CVE-2019-16201", "CVE-2019-16254", "CVE-2019-16255");
  script_xref(name:"DSA", value:"4587");

  script_name(english:"Debian DSA-4587-1 : ruby2.3 - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Several vulnerabilities have been discovered in the interpreter for
the Ruby language, which could result in unauthorized access by
bypassing intended path matchings, denial of service, or the execution
of arbitrary code."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/ruby2.3"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/ruby2.3"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2019/dsa-4587"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"Upgrade the ruby2.3 packages.

For the oldstable distribution (stretch), these problems have been
fixed in version 2.3.3-1+deb9u7."
  );
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/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-2019-16255");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby2.3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/11/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/12/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"libruby2.3", reference:"2.3.3-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"ruby2.3", reference:"2.3.3-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"ruby2.3-dev", reference:"2.3.3-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"ruby2.3-doc", reference:"2.3.3-1+deb9u7")) flag++;
if (deb_check(release:"9.0", prefix:"ruby2.3-tcltk", reference:"2.3.3-1+deb9u7")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");