CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
83.4%
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:2769 advisory.
Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.
Security Fix(es):
* rubygems: Installing a malicious gem may lead to arbitrary code execution (CVE-2019-8324)
* ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives (CVE-2018-16396)
* rubygems: Escape sequence injection vulnerability in verbose (CVE-2019-8321)
* rubygems: Escape sequence injection vulnerability in gem owner (CVE-2019-8322)
* rubygems: Escape sequence injection vulnerability in API response handling (CVE-2019-8323)
* rubygems: Escape sequence injection vulnerability in errors (CVE-2019-8325)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2020:2769. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(137897);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");
script_cve_id(
"CVE-2018-16396",
"CVE-2019-8321",
"CVE-2019-8322",
"CVE-2019-8323",
"CVE-2019-8324",
"CVE-2019-8325"
);
script_bugtraq_id(105955);
script_xref(name:"RHSA", value:"2020:2769");
script_name(english:"RHEL 7 : ruby (RHSA-2020:2769)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for ruby.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2020:2769 advisory.
Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text
files and to perform system management tasks.
Security Fix(es):
* rubygems: Installing a malicious gem may lead to arbitrary code execution (CVE-2019-8324)
* ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives
(CVE-2018-16396)
* rubygems: Escape sequence injection vulnerability in verbose (CVE-2019-8321)
* rubygems: Escape sequence injection vulnerability in gem owner (CVE-2019-8322)
* rubygems: Escape sequence injection vulnerability in API response handling (CVE-2019-8323)
* rubygems: Escape sequence injection vulnerability in errors (CVE-2019-8325)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
# https://access.redhat.com/security/data/csaf/v2/advisories/2020/rhsa-2020_2769.json
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?32961bf7");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2020:2769");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1643089");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1692514");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1692516");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1692519");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1692520");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1692522");
script_set_attribute(attribute:"solution", value:
"Update the RHEL ruby package based on the guidance in RHSA-2020:2769.");
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:L/PR:N/UI:R/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-2019-8324");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(20, 88);
script_set_attribute(attribute:"vendor_severity", value:"Important");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/10/25");
script_set_attribute(attribute:"patch_publication_date", value:"2020/06/30");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/30");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_aus:7.4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:7.4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_tus:7.4");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-irb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-tcltk");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygem-bigdecimal");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygem-io-console");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygem-json");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygem-minitest");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygem-psych");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygem-rake");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygem-rdoc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygems");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygems-devel");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat 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", "redhat_repos.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
include('rhel.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'eq', os_version: os_ver, rhel_version: '7.4')) audit(AUDIT_OS_NOT, 'Red Hat 7.4', 'Red Hat ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);
var constraints = [
{
'repo_relative_urls': [
'content/aus/rhel/server/7/7.4/x86_64/debug',
'content/aus/rhel/server/7/7.4/x86_64/optional/debug',
'content/aus/rhel/server/7/7.4/x86_64/optional/os',
'content/aus/rhel/server/7/7.4/x86_64/optional/source/SRPMS',
'content/aus/rhel/server/7/7.4/x86_64/os',
'content/aus/rhel/server/7/7.4/x86_64/source/SRPMS',
'content/e4s/rhel/power-le/7/7.4/ppc64le/debug',
'content/e4s/rhel/power-le/7/7.4/ppc64le/highavailability/debug',
'content/e4s/rhel/power-le/7/7.4/ppc64le/highavailability/os',
'content/e4s/rhel/power-le/7/7.4/ppc64le/highavailability/source/SRPMS',
'content/e4s/rhel/power-le/7/7.4/ppc64le/optional/debug',
'content/e4s/rhel/power-le/7/7.4/ppc64le/optional/os',
'content/e4s/rhel/power-le/7/7.4/ppc64le/optional/source/SRPMS',
'content/e4s/rhel/power-le/7/7.4/ppc64le/os',
'content/e4s/rhel/power-le/7/7.4/ppc64le/source/SRPMS',
'content/e4s/rhel/server/7/7.4/x86_64/debug',
'content/e4s/rhel/server/7/7.4/x86_64/highavailability/debug',
'content/e4s/rhel/server/7/7.4/x86_64/highavailability/os',
'content/e4s/rhel/server/7/7.4/x86_64/highavailability/source/SRPMS',
'content/e4s/rhel/server/7/7.4/x86_64/optional/debug',
'content/e4s/rhel/server/7/7.4/x86_64/optional/os',
'content/e4s/rhel/server/7/7.4/x86_64/optional/source/SRPMS',
'content/e4s/rhel/server/7/7.4/x86_64/os',
'content/e4s/rhel/server/7/7.4/x86_64/source/SRPMS',
'content/tus/rhel/server/7/7.4/x86_64/debug',
'content/tus/rhel/server/7/7.4/x86_64/optional/debug',
'content/tus/rhel/server/7/7.4/x86_64/optional/os',
'content/tus/rhel/server/7/7.4/x86_64/optional/source/SRPMS',
'content/tus/rhel/server/7/7.4/x86_64/os',
'content/tus/rhel/server/7/7.4/x86_64/source/SRPMS'
],
'pkgs': [
{'reference':'ruby-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-devel-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-devel-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-doc-2.0.0.648-37.el7_4', 'sp':'4', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-irb-2.0.0.648-37.el7_4', 'sp':'4', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-libs-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-libs-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-libs-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-tcltk-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-tcltk-2.0.0.648-37.el7_4', 'sp':'4', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-bigdecimal-1.2.0-37.el7_4', 'sp':'4', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-bigdecimal-1.2.0-37.el7_4', 'sp':'4', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-io-console-0.4.2-37.el7_4', 'sp':'4', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-io-console-0.4.2-37.el7_4', 'sp':'4', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-json-1.7.7-37.el7_4', 'sp':'4', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-json-1.7.7-37.el7_4', 'sp':'4', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-minitest-4.3.2-37.el7_4', 'sp':'4', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-psych-2.0.0-37.el7_4', 'sp':'4', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-psych-2.0.0-37.el7_4', 'sp':'4', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-rake-0.9.6-37.el7_4', 'sp':'4', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-rdoc-4.0.0-37.el7_4', 'sp':'4', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygems-2.0.14.1-37.el7_4', 'sp':'4', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygems-devel-2.0.14.1-37.el7_4', 'sp':'4', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
]
}
];
var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);
var flag = 0;
foreach var constraint_array ( constraints ) {
var repo_relative_urls = NULL;
if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
foreach var pkg ( constraint_array['pkgs'] ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
var exists_check = NULL;
var cves = NULL;
if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
if (reference &&
_release &&
rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
(applicable_repo_urls || (!exists_check || rpm_exists(release:_release, rpm:exists_check))) &&
rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
}
}
if (flag)
{
var subscription_caveat = '\n' +
'NOTE: This vulnerability check contains fixes that apply to\n' +
'packages only available in the Red Hat Enterprise Linux\n' +
'Advanced Update Support, Telco Extended Update Support or Update Services for SAP Solutions repositories.\n' +
'Access to these repositories requires a paid RHEL subscription.\n';
var extra = NULL;
if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = subscription_caveat + rpm_report_get() + redhat_report_repo_caveat();
else extra = subscription_caveat + rpm_report_get();
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : extra
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ruby / ruby-devel / ruby-doc / ruby-irb / ruby-libs / ruby-tcltk / etc');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16396
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8321
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8322
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8323
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8324
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8325
www.nessus.org/u?32961bf7
access.redhat.com/errata/RHSA-2020:2769
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=1643089
bugzilla.redhat.com/show_bug.cgi?id=1692514
bugzilla.redhat.com/show_bug.cgi?id=1692516
bugzilla.redhat.com/show_bug.cgi?id=1692519
bugzilla.redhat.com/show_bug.cgi?id=1692520
bugzilla.redhat.com/show_bug.cgi?id=1692522
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
83.4%