CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
60.0%
The version of openssl installed on the remote host is prior to 1.0.2k-19. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2021-1687 advisory.
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 Amazon Linux 2 Security Advisory ALAS-2021-1687.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(151794);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/01");
script_cve_id("CVE-2019-1551");
script_xref(name:"IAVA", value:"2020-A-0326");
script_xref(name:"IAVA", value:"2019-A-0303-S");
script_xref(name:"ALAS", value:"2021-1687");
script_xref(name:"IAVA", value:"2020-A-0321-S");
script_name(english:"Amazon Linux 2 : openssl (ALAS-2021-1687)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The version of openssl installed on the remote host is prior to 1.0.2k-19. It is, therefore, affected by a vulnerability
as referenced in the ALAS2-2021-1687 advisory.
- There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit
moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime
RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed
likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have
to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low
level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected
1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t). (CVE-2019-1551)
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/AL2/ALAS-2021-1687.html");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2019-1551");
script_set_attribute(attribute:"solution", value:
"Run 'yum update openssl' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/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:L/I:N/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-2019-1551");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/08/22");
script_set_attribute(attribute:"patch_publication_date", value:"2021/07/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/07/16");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openssl-static");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/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 != "2")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
pkgs = [
{'reference':'openssl-1.0.2k-19.amzn2.0.7', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-1.0.2k-19.amzn2.0.7', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-1.0.2k-19.amzn2.0.7', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-debuginfo-1.0.2k-19.amzn2.0.7', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-debuginfo-1.0.2k-19.amzn2.0.7', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-debuginfo-1.0.2k-19.amzn2.0.7', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-devel-1.0.2k-19.amzn2.0.7', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-devel-1.0.2k-19.amzn2.0.7', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-devel-1.0.2k-19.amzn2.0.7', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-libs-1.0.2k-19.amzn2.0.7', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-libs-1.0.2k-19.amzn2.0.7', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-libs-1.0.2k-19.amzn2.0.7', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-perl-1.0.2k-19.amzn2.0.7', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-perl-1.0.2k-19.amzn2.0.7', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-perl-1.0.2k-19.amzn2.0.7', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-static-1.0.2k-19.amzn2.0.7', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-static-1.0.2k-19.amzn2.0.7', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openssl-static-1.0.2k-19.amzn2.0.7', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE}
];
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, "openssl / openssl-debuginfo / openssl-devel / etc");
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
60.0%