The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5066 advisory.
The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing. (CVE-2021-28965)
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 descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5066. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(157378);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/17");
script_cve_id(
"CVE-2021-28965",
"CVE-2021-31799",
"CVE-2021-31810",
"CVE-2021-32066",
"CVE-2021-41817",
"CVE-2021-41819"
);
script_name(english:"Debian DSA-5066-1 : ruby2.5 - security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
script_set_attribute(attribute:"description", value:
"The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5066 advisory.
- The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not
properly address XML round-trip issues. An incorrect document can be produced after parsing and
serializing. (CVE-2021-28965)
- 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://security-tracker.debian.org/tracker/source-package/ruby2.5");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2022/dsa-5066");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-28965");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-31799");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-31810");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-32066");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-41817");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-41819");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/ruby2.5");
script_set_attribute(attribute:"solution", value:
"Upgrade the ruby2.5 packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
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:N/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-32066");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-41819");
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:"2021/04/21");
script_set_attribute(attribute:"patch_publication_date", value:"2022/02/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libruby2.5");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby2.5");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby2.5-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby2.5-doc");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian 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/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/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0', 'Debian ' + release);
var 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, 'Debian', cpu);
var pkgs = [
{'release': '10.0', 'prefix': 'libruby2.5', 'reference': '2.5.5-3+deb10u4'},
{'release': '10.0', 'prefix': 'ruby2.5', 'reference': '2.5.5-3+deb10u4'},
{'release': '10.0', 'prefix': 'ruby2.5-dev', 'reference': '2.5.5-3+deb10u4'},
{'release': '10.0', 'prefix': 'ruby2.5-doc', 'reference': '2.5.5-3+deb10u4'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var release = NULL;
var prefix = NULL;
var reference = NULL;
if (!empty_or_null(package_array['release'])) release = package_array['release'];
if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (release && prefix && reference) {
if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : deb_report_get()
);
exit(0);
}
else
{
var tested = deb_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libruby2.5 / ruby2.5 / ruby2.5-dev / ruby2.5-doc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | libruby2.5 | p-cpe:/a:debian:debian_linux:libruby2.5 |
debian | debian_linux | ruby2.5 | p-cpe:/a:debian:debian_linux:ruby2.5 |
debian | debian_linux | ruby2.5-dev | p-cpe:/a:debian:debian_linux:ruby2.5-dev |
debian | debian_linux | ruby2.5-doc | p-cpe:/a:debian:debian_linux:ruby2.5-doc |
debian | debian_linux | 10.0 | cpe:/o:debian:debian_linux:10.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28965
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
packages.debian.org/source/buster/ruby2.5
security-tracker.debian.org/tracker/CVE-2021-28965
security-tracker.debian.org/tracker/CVE-2021-31799
security-tracker.debian.org/tracker/CVE-2021-31810
security-tracker.debian.org/tracker/CVE-2021-32066
security-tracker.debian.org/tracker/CVE-2021-41817
security-tracker.debian.org/tracker/CVE-2021-41819
security-tracker.debian.org/tracker/source-package/ruby2.5
www.debian.org/security/2022/dsa-5066