4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
53.3%
Unsanitized input when searching in local cache database
It was found that sssd’s sysdb_search_user_by_upn_res() function did not sanitize requests when querying its local cache and was vulnerable to injection. In a centralized login environment, if a password hash was locally cached for a given user, an authenticated attacker could use this flaw to retrieve it. (CVE-2017-12173)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2017-935.
#
include("compat.inc");
if (description)
{
script_id(105420);
script_version("3.3");
script_cvs_date("Date: 2018/10/01 10:24:12");
script_cve_id("CVE-2017-12173");
script_xref(name:"ALAS", value:"2017-935");
script_name(english:"Amazon Linux AMI : sssd (ALAS-2017-935)");
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:
"Unsanitized input when searching in local cache database
It was found that sssd's sysdb_search_user_by_upn_res() function did
not sanitize requests when querying its local cache and was vulnerable
to injection. In a centralized login environment, if a password hash
was locally cached for a given user, an authenticated attacker could
use this flaw to retrieve it. (CVE-2017-12173)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2017-935.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update sssd' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
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_set_attribute(attribute:"patch_publication_date", value:"2017/12/21");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/26");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Amazon Linux Local Security Checks");
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);
flag = 0;
if (rpm_check(release:"ALA", reference:"libipa_hbac-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libipa_hbac-devel-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_autofs-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_certmap-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_certmap-devel-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_idmap-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_idmap-devel-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_nss_idmap-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_nss_idmap-devel-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_simpleifp-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_simpleifp-devel-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libsss_sudo-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-libipa_hbac-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-libsss_nss_idmap-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-sss-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-sss-murmur-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"python27-sssdconfig-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-ad-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-client-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-common-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-common-pac-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-dbus-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-debuginfo-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-ipa-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-krb5-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-krb5-common-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-ldap-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-libwbclient-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-libwbclient-devel-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-proxy-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-tools-1.15.2-50.34.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"sssd-winbind-idmap-1.15.2-50.34.amzn1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
else security_warning(0);
exit(0);
}
else
{
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 / libsss_certmap / 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 | 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 | 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 |
amazon | linux | libsss_nss_idmap-devel | p-cpe:/a:amazon:linux:libsss_nss_idmap-devel |
amazon | linux | libsss_simpleifp | p-cpe:/a:amazon:linux:libsss_simpleifp |
4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
53.3%