9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
8.8 High
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
8 High
AI Score
Confidence
High
0.011 Low
EPSS
Percentile
84.6%
The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2022:0543 advisory.
Bundler 1.16.0 through 2.2.9 and 2.2.11 through 2.2.16 sometimes chooses a dependency source based on the highest gem version number, which means that a rogue gem found at a public source may be chosen, even if the intended choice was a private gem that is a dependency of another private gem that is explicitly depended on by the application. NOTE: it is not correct to use CVE-2021-24105 for every Dependency Confusion issue in every product. (CVE-2020-36327)
In RDoc 3.11 through 6.x before 6.3.1, as distributed with Ruby through 3.0.1, it is possible to execute arbitrary code via | and tags in a filename. (CVE-2021-31799)
An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port.
This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions). (CVE-2021-31810)
An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the- middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a StartTLS stripping attack. (CVE-2021-32066)
Date.parse in the date gem through 3.2.0 for Ruby allows ReDoS (regular expression Denial of Service) via a long string. The fixed versions are 3.2.1, 3.1.2, 3.0.2, and 2.0.1. (CVE-2021-41817)
CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby. (CVE-2021-41819)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2022:0543.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(158828);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/06");
script_cve_id(
"CVE-2020-36327",
"CVE-2021-31799",
"CVE-2021-31810",
"CVE-2021-32066",
"CVE-2021-41817",
"CVE-2021-41819"
);
script_xref(name:"ALSA", value:"2022:0543");
script_name(english:"AlmaLinux 8 : ruby:2.6 (ALSA-2022:0543)");
script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-2022:0543 advisory.
- Bundler 1.16.0 through 2.2.9 and 2.2.11 through 2.2.16 sometimes chooses a dependency source based on the
highest gem version number, which means that a rogue gem found at a public source may be chosen, even if
the intended choice was a private gem that is a dependency of another private gem that is explicitly
depended on by the application. NOTE: it is not correct to use CVE-2021-24105 for every Dependency
Confusion issue in every product. (CVE-2020-36327)
- In RDoc 3.11 through 6.x before 6.3.1, as distributed with Ruby through 3.0.1, it is possible to execute
arbitrary code via | and tags in a filename. (CVE-2021-31799)
- An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP
server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port.
This potentially makes curl extract information about services that are otherwise private and not
disclosed (e.g., the attacker can conduct port scans and service banner extractions). (CVE-2021-31810)
- An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does
not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-
middle attackers to bypass the TLS protections by leveraging a network position between the client and the
registry to block the StartTLS command, aka a StartTLS stripping attack. (CVE-2021-32066)
- Date.parse in the date gem through 3.2.0 for Ruby allows ReDoS (regular expression Denial of Service) via
a long string. The fixed versions are 3.2.1, 3.1.2, 3.0.2, and 2.0.1. (CVE-2021-41817)
- CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects
the CGI gem through 0.3.0 for Ruby. (CVE-2021-41819)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://errata.almalinux.org/8/ALSA-2022-0543.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
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:R/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-2020-36327");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/04/29");
script_set_attribute(attribute:"patch_publication_date", value:"2022/02/16");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/11");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:ruby");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:ruby-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:ruby-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:ruby-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-abrt");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-abrt-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-bigdecimal");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-bson");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-bson-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-bundler");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-did_you_mean");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-io-console");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-irb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-json");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-minitest");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-mongo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-mongo-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-mysql2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-mysql2-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-net-telnet");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-openssl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-pg");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-pg-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-power_assert");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-psych");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-rake");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-rdoc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-test-unit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygem-xmlrpc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygems");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rubygems-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Alma Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");
exit(0);
}
include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/AlmaLinux/release');
if (isnull(release) || 'AlmaLinux' >!< release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
var os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 8.x', 'AlmaLinux ' + os_ver);
if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);
var module_ver = get_kb_item('Host/AlmaLinux/appstream/ruby');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module ruby:2.6');
if ('2.6' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module ruby:' + module_ver);
var appstreams = {
'ruby:2.6': [
{'reference':'ruby-2.6.9-108.module_el8.5.0+2623+08a8ba32', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-2.6.9-108.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-devel-2.6.9-108.module_el8.5.0+2623+08a8ba32', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-devel-2.6.9-108.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-doc-2.6.9-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-libs-2.6.9-108.module_el8.5.0+2623+08a8ba32', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ruby-libs-2.6.9-108.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-abrt-0.3.0-4.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-abrt-doc-0.3.0-4.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-bigdecimal-1.4.1-108.module_el8.5.0+2623+08a8ba32', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-bigdecimal-1.4.1-108.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-bson-4.5.0-1.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-bson-doc-4.5.0-1.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-bundler-1.17.2-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-did_you_mean-1.3.0-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-io-console-0.4.7-108.module_el8.5.0+2623+08a8ba32', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-io-console-0.4.7-108.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-irb-1.0.0-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-json-2.1.0-108.module_el8.5.0+2623+08a8ba32', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-json-2.1.0-108.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-minitest-5.11.3-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-mongo-2.8.0-1.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-mongo-doc-2.8.0-1.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-mysql2-0.5.2-1.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-mysql2-doc-0.5.2-1.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-net-telnet-0.2.0-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-openssl-2.1.2-108.module_el8.5.0+2623+08a8ba32', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-openssl-2.1.2-108.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-pg-1.1.4-1.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-pg-doc-1.1.4-1.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-power_assert-1.1.3-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-psych-3.1.0-108.module_el8.5.0+2623+08a8ba32', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-psych-3.1.0-108.module_el8.5.0+2623+08a8ba32', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-rake-12.3.3-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-rdoc-6.1.2.1-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-test-unit-3.2.9-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygem-xmlrpc-0.3.0-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygems-3.0.3.1-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'rubygems-devel-3.0.3.1-108.module_el8.5.0+2623+08a8ba32', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
]
};
var flag = 0;
var appstreams_found = 0;
foreach module (keys(appstreams)) {
var appstream = NULL;
var appstream_name = NULL;
var appstream_version = NULL;
var appstream_split = split(module, sep:':', keep:FALSE);
if (!empty_or_null(appstream_split)) {
appstream_name = appstream_split[0];
appstream_version = appstream_split[1];
if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/AlmaLinux/appstream/' + appstream_name);
}
if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
appstreams_found++;
foreach package_array ( appstreams[module] ) {
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;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) release = 'Alma-' + package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && release && (!exists_check || rpm_exists(release:release, rpm:exists_check))) {
if (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)) flag++;
}
}
}
}
if (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module ruby:2.6');
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
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-libs / rubygem-abrt / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
alma | linux | ruby | p-cpe:/a:alma:linux:ruby |
alma | linux | ruby-devel | p-cpe:/a:alma:linux:ruby-devel |
alma | linux | ruby-doc | p-cpe:/a:alma:linux:ruby-doc |
alma | linux | ruby-libs | p-cpe:/a:alma:linux:ruby-libs |
alma | linux | rubygem-abrt | p-cpe:/a:alma:linux:rubygem-abrt |
alma | linux | rubygem-abrt-doc | p-cpe:/a:alma:linux:rubygem-abrt-doc |
alma | linux | rubygem-bigdecimal | p-cpe:/a:alma:linux:rubygem-bigdecimal |
alma | linux | rubygem-bson | p-cpe:/a:alma:linux:rubygem-bson |
alma | linux | rubygem-bson-doc | p-cpe:/a:alma:linux:rubygem-bson-doc |
alma | linux | rubygem-bundler | p-cpe:/a:alma:linux:rubygem-bundler |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36327
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31799
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31810
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32066
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41817
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41819
errata.almalinux.org/8/ALSA-2022-0543.html
9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
8.8 High
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
8 High
AI Score
Confidence
High
0.011 Low
EPSS
Percentile
84.6%