CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
100.0%
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor’s data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks. (CVE-2017-5715)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2018-952.
#
include("compat.inc");
if (description)
{
script_id(109123);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/04/15");
script_cve_id("CVE-2017-5715");
script_xref(name:"ALAS", value:"2018-952");
script_xref(name:"IAVA", value:"2018-A-0020");
script_name(english:"Amazon Linux 2 : libvirt (ALAS-2018-952) (Spectre)");
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:
"An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a
commonly used performance optimization). There are three primary
variants of the issue which differ in the way the speculative
execution can be exploited. Variant CVE-2017-5715 triggers the
speculative execution by utilizing branch target injection. It relies
on the presence of a precisely-defined instruction sequence in the
privileged code as well as the fact that memory accesses may cause
allocation into the microprocessor's data cache even for speculatively
executed instructions that never actually commit (retire). As a
result, an unprivileged attacker could use this flaw to cross the
syscall and guest/host boundaries and read privileged memory by
conducting targeted cache side-channel attacks. (CVE-2017-5715)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/AL2/ALAS-2018-952.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update libvirt' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-admin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-client");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-config-network");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-config-nwfilter");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-interface");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-lxc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-network");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-nodedev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-nwfilter");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-qemu");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-secret");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-disk");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-gluster");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-iscsi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-logical");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-mpath");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-rbd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-scsi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-daemon-lxc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-lock-sanlock");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-login-shell");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libvirt-nss");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/01/04");
script_set_attribute(attribute:"patch_publication_date", value:"2018/02/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/18");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2018-2021 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", cpu:"x86_64", reference:"libvirt-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-admin-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-client-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-config-network-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-config-nwfilter-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-interface-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-lxc-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-network-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-nodedev-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-nwfilter-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-qemu-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-secret-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-core-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-disk-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-gluster-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-iscsi-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-logical-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-mpath-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-rbd-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-driver-storage-scsi-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-kvm-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-daemon-lxc-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-debuginfo-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-devel-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-docs-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-libs-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-lock-sanlock-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-login-shell-3.2.0-14.amzn2.7")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"libvirt-nss-3.2.0-14.amzn2.7")) 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, "libvirt / libvirt-admin / libvirt-client / libvirt-daemon / etc");
}
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
100.0%