The version of sssd installed on the remote host is prior to 1.16.4-21.26. It is, therefore, affected by a vulnerability as referenced in the ALAS-2021-1542 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 AMI Security Advisory ALAS-2021-1542.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(153858);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/10");
script_cve_id("CVE-2021-3621");
script_xref(name:"ALAS", value:"2021-1542");
script_name(english:"Amazon Linux AMI : sssd (ALAS-2021-1542)");
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 sssd installed on the remote host is prior to 1.16.4-21.26. It is, therefore, affected by a vulnerability
as referenced in the ALAS-2021-1542 advisory.
- A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-
fetch and cache-expire subcommands. This flaw allows an attacker to trick the root user into running a
specially crafted sssctl command, such as via sudo, to gain root access. The highest threat from this
vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-3621)
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-2021-1542.html");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-3621");
script_set_attribute(attribute:"solution", value:
"Run 'yum update sssd' to update your system.");
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: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-2021-3621");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/08/16");
script_set_attribute(attribute:"patch_publication_date", value:"2021/10/01");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libipa_hbac");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libipa_hbac-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_autofs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_certmap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_certmap-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_idmap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_idmap-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_nss_idmap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_nss_idmap-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_simpleifp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_simpleifp-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsss_sudo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-libipa_hbac");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-libsss_nss_idmap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-sss");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-sss-murmur");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python27-sssdconfig");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-ad");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-client");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-common-pac");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-dbus");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-ipa");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-krb5");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-krb5-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-ldap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-libwbclient");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-libwbclient-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-proxy");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:sssd-winbind-idmap");
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) 2021-2022 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);
var release = get_kb_item("Host/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
var 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);
var pkgs = [
{'reference':'libipa_hbac-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libipa_hbac-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libipa_hbac-devel-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libipa_hbac-devel-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_autofs-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_autofs-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_certmap-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_certmap-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_certmap-devel-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_certmap-devel-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_idmap-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_idmap-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_idmap-devel-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_idmap-devel-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_nss_idmap-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_nss_idmap-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_nss_idmap-devel-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_nss_idmap-devel-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_simpleifp-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_simpleifp-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_simpleifp-devel-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_simpleifp-devel-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_sudo-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsss_sudo-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-libipa_hbac-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-libipa_hbac-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-libsss_nss_idmap-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-libsss_nss_idmap-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-sss-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-sss-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-sss-murmur-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-sss-murmur-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-sssdconfig-1.16.4-21.26.amzn1', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-ad-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-ad-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-client-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-client-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-common-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-common-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-common-pac-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-common-pac-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-dbus-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-dbus-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-debuginfo-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-debuginfo-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-ipa-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-ipa-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-krb5-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-krb5-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-krb5-common-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-krb5-common-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-ldap-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-ldap-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-libwbclient-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-libwbclient-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-libwbclient-devel-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-libwbclient-devel-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-proxy-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-proxy-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-tools-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-tools-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-winbind-idmap-1.16.4-21.26.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sssd-winbind-idmap-1.16.4-21.26.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE}
];
var flag = 0;
foreach package_array ( pkgs ) {
var reference = NULL;
var release = NULL;
var cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var 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_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, "libipa_hbac / libipa_hbac-devel / libsss_autofs / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | libipa_hbac | p-cpe:/a:amazon:linux:libipa_hbac |
amazon | linux | libipa_hbac-devel | p-cpe:/a:amazon:linux:libipa_hbac-devel |
amazon | linux | sssd-libwbclient | p-cpe:/a:amazon:linux:sssd-libwbclient |
amazon | linux | libsss_autofs | p-cpe:/a:amazon:linux:libsss_autofs |
amazon | linux | libsss_certmap | p-cpe:/a:amazon:linux:libsss_certmap |
amazon | linux | libsss_certmap-devel | p-cpe:/a:amazon:linux:libsss_certmap-devel |
amazon | linux | sssd-libwbclient-devel | p-cpe:/a:amazon:linux:sssd-libwbclient-devel |
amazon | linux | libsss_idmap | p-cpe:/a:amazon:linux:libsss_idmap |
amazon | linux | libsss_idmap-devel | p-cpe:/a:amazon:linux:libsss_idmap-devel |
amazon | linux | libsss_nss_idmap | p-cpe:/a:amazon:linux:libsss_nss_idmap |