3.3 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:P/A:N
4.4 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
0.0004 Low
EPSS
Percentile
12.6%
Context relabeling of filesystems is vulnerable to symbolic link attack, allowing a local, unprivileged malicious entity to change the SELinux context of an arbitrary file to a context with few restrictions. This only happens when the relabeling process is done, usually when taking SELinux state from disabled to enable (permissive or enforcing).(CVE-2018-1063)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2018-1076.
#
include("compat.inc");
if (description)
{
script_id(117590);
script_version("1.1");
script_cvs_date("Date: 2018/09/19 10:04:09");
script_cve_id("CVE-2018-1063");
script_xref(name:"ALAS", value:"2018-1076");
script_name(english:"Amazon Linux 2 : policycoreutils (ALAS-2018-1076)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Amazon Linux 2 host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"Context relabeling of filesystems is vulnerable to symbolic link
attack, allowing a local, unprivileged malicious entity to change the
SELinux context of an arbitrary file to a context with few
restrictions. This only happens when the relabeling process is done,
usually when taking SELinux state from disabled to enable (permissive
or enforcing).(CVE-2018-1063)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/AL2/ALAS-2018-1076.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update policycoreutils' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:N");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:policycoreutils");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:policycoreutils-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:policycoreutils-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:policycoreutils-gui");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:policycoreutils-newrole");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:policycoreutils-python");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:policycoreutils-restorecond");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:policycoreutils-sandbox");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
script_set_attribute(attribute:"patch_publication_date", value:"2018/09/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/19");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 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 != "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);
flag = 0;
if (rpm_check(release:"AL2", reference:"policycoreutils-2.5-22.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"policycoreutils-debuginfo-2.5-22.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"policycoreutils-devel-2.5-22.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"policycoreutils-gui-2.5-22.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"policycoreutils-newrole-2.5-22.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"policycoreutils-python-2.5-22.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"policycoreutils-restorecond-2.5-22.amzn2")) flag++;
if (rpm_check(release:"AL2", reference:"policycoreutils-sandbox-2.5-22.amzn2")) flag++;
if (flag)
{
if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
else security_note(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "policycoreutils / policycoreutils-debuginfo / policycoreutils-devel / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | policycoreutils | p-cpe:/a:amazon:linux:policycoreutils |
amazon | linux | policycoreutils-debuginfo | p-cpe:/a:amazon:linux:policycoreutils-debuginfo |
amazon | linux | policycoreutils-devel | p-cpe:/a:amazon:linux:policycoreutils-devel |
amazon | linux | policycoreutils-gui | p-cpe:/a:amazon:linux:policycoreutils-gui |
amazon | linux | policycoreutils-newrole | p-cpe:/a:amazon:linux:policycoreutils-newrole |
amazon | linux | policycoreutils-python | p-cpe:/a:amazon:linux:policycoreutils-python |
amazon | linux | policycoreutils-restorecond | p-cpe:/a:amazon:linux:policycoreutils-restorecond |
amazon | linux | policycoreutils-sandbox | p-cpe:/a:amazon:linux:policycoreutils-sandbox |
amazon | linux | 2 | cpe:/o:amazon:linux:2 |
3.3 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:P/A:N
4.4 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
0.0004 Low
EPSS
Percentile
12.6%