5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
0.003 Low
EPSS
Percentile
69.4%
The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the ALAS-2020-1451 advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2020-1451.
##
include('compat.inc');
if (description)
{
script_id(142979);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/11/18");
script_cve_id("CVE-2020-25613");
script_xref(name:"ALAS", value:"2020-1451");
script_name(english:"Amazon Linux AMI : ruby24 (ALAS-2020-1451)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by a
vulnerability as referenced in the ALAS-2020-1451 advisory.
- An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a
simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An
attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header
check), which may lead to an HTTP Request Smuggling attack. (CVE-2020-25613)
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://alas.aws.amazon.com/ALAS-2020-1451.html");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-25613");
script_set_attribute(attribute:"solution", value:
"Run 'yum update ruby24' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
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:N/S:U/C:N/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25613");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/10/06");
script_set_attribute(attribute:"patch_publication_date", value:"2020/11/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/11/18");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby24");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby24-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby24-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby24-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby24-irb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ruby24-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-bigdecimal");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-did_you_mean");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-io-console");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-json");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-minitest5");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-net-telnet");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-power_assert");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-psych");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-rdoc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-test-unit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygem24-xmlrpc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygems24");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:rubygems24-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux 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/AmazonLinux/release", "Host/AmazonLinux/rpm-list");
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/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
pkgs = [
{'reference':'ruby24-2.4.10-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'ruby24-2.4.10-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'ruby24-debuginfo-2.4.10-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'ruby24-debuginfo-2.4.10-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'ruby24-devel-2.4.10-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'ruby24-devel-2.4.10-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'ruby24-doc-2.4.10-2.13.amzn1', 'release':'ALA'},
{'reference':'ruby24-irb-2.4.10-2.13.amzn1', 'release':'ALA'},
{'reference':'ruby24-libs-2.4.10-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'ruby24-libs-2.4.10-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'rubygem24-bigdecimal-1.3.2-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'rubygem24-bigdecimal-1.3.2-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'rubygem24-did_you_mean-1.1.0-2.13.amzn1', 'release':'ALA'},
{'reference':'rubygem24-io-console-0.4.6-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'rubygem24-io-console-0.4.6-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'rubygem24-json-2.0.4-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'rubygem24-json-2.0.4-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'rubygem24-minitest5-5.10.1-2.13.amzn1', 'release':'ALA'},
{'reference':'rubygem24-net-telnet-0.1.1-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'rubygem24-net-telnet-0.1.1-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'rubygem24-power_assert-0.4.1-2.13.amzn1', 'release':'ALA'},
{'reference':'rubygem24-psych-2.2.2-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'rubygem24-psych-2.2.2-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'rubygem24-rdoc-5.0.1-2.13.amzn1', 'release':'ALA'},
{'reference':'rubygem24-test-unit-3.2.3-2.13.amzn1', 'release':'ALA'},
{'reference':'rubygem24-xmlrpc-0.2.1-2.13.amzn1', 'cpu':'i686', 'release':'ALA'},
{'reference':'rubygem24-xmlrpc-0.2.1-2.13.amzn1', 'cpu':'x86_64', 'release':'ALA'},
{'reference':'rubygems24-2.6.14.4-2.13.amzn1', 'release':'ALA'},
{'reference':'rubygems24-devel-2.6.14.4-2.13.amzn1', 'release':'ALA'}
];
flag = 0;
foreach package_array ( pkgs ) {
reference = NULL;
release = NULL;
cpu = NULL;
el_string = NULL;
rpm_spec_vers_cmp = NULL;
allowmaj = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) release = package_array['release'];
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['allowmaj'])) allowmaj = package_array['allowmaj'];
if (reference && release) {
if (rpm_check(release:release, cpu:cpu, reference:reference, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) 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, "ruby24 / ruby24-debuginfo / ruby24-devel / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | ruby24 | p-cpe:/a:amazon:linux:ruby24 |
amazon | linux | ruby24-debuginfo | p-cpe:/a:amazon:linux:ruby24-debuginfo |
amazon | linux | ruby24-devel | p-cpe:/a:amazon:linux:ruby24-devel |
amazon | linux | ruby24-doc | p-cpe:/a:amazon:linux:ruby24-doc |
amazon | linux | ruby24-irb | p-cpe:/a:amazon:linux:ruby24-irb |
amazon | linux | ruby24-libs | p-cpe:/a:amazon:linux:ruby24-libs |
amazon | linux | rubygem24-bigdecimal | p-cpe:/a:amazon:linux:rubygem24-bigdecimal |
amazon | linux | rubygem24-did_you_mean | p-cpe:/a:amazon:linux:rubygem24-did_you_mean |
amazon | linux | rubygem24-io-console | p-cpe:/a:amazon:linux:rubygem24-io-console |
amazon | linux | rubygem24-json | p-cpe:/a:amazon:linux:rubygem24-json |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
0.003 Low
EPSS
Percentile
69.4%