CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
90.0%
A heap buffer overflow issue was found in the load_device_tree() function of QEMU, which is invoked to load a device tree blob at boot time. It occurs due to device tree size manipulation before buffer allocation, which could overflow a signed int type. A user/process could use this flaw to potentially execute arbitrary code on a host system with privileges of the QEMU process. (CVE-2018-20815)
hw/sparc64/sun4u.c in QEMU 3.1.50 is vulnerable to a NULL pointer dereference, which allows the attacker to cause a denial of service via a device driver. (CVE-2019-5008)
Slirp: information leakage in tcp_emu() due to uninitialized stack variables (CVE-2019-9824)
qxl: NULL pointer dereference while releasing spice resources (CVE-2019-12155)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2019-1248.
#
include('compat.inc');
if (description)
{
script_id(126960);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/08");
script_cve_id(
"CVE-2018-20815",
"CVE-2019-12155",
"CVE-2019-5008",
"CVE-2019-9824"
);
script_xref(name:"ALAS", value:"2019-1248");
script_name(english:"Amazon Linux 2 : qemu (ALAS-2019-1248)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
script_set_attribute(attribute:"description", value:
"A heap buffer overflow issue was found in the load_device_tree()
function of QEMU, which is invoked to load a device tree blob at boot
time. It occurs due to device tree size manipulation before buffer
allocation, which could overflow a signed int type. A user/process
could use this flaw to potentially execute arbitrary code on a host
system with privileges of the QEMU process. (CVE-2018-20815)
hw/sparc64/sun4u.c in QEMU 3.1.50 is vulnerable to a NULL pointer
dereference, which allows the attacker to cause a denial of service
via a device driver. (CVE-2019-5008)
Slirp: information leakage in tcp_emu() due to uninitialized stack
variables (CVE-2019-9824)
qxl: NULL pointer dereference while releasing spice resources
(CVE-2019-12155)");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/AL2/ALAS-2019-1248.html");
script_set_attribute(attribute:"solution", value:
"Run 'yum update qemu' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-20815");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/19");
script_set_attribute(attribute:"patch_publication_date", value:"2019/07/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/24");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ivshmem-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-audio-alsa");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-audio-oss");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-audio-pa");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-audio-sdl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-block-curl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-block-dmg");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-block-iscsi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-block-nfs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-block-rbd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-block-ssh");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-guest-agent");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-img");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-kvm-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-system-aarch64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-system-aarch64-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-system-x86");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-system-x86-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-ui-curses");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-ui-gtk");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-ui-sdl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-user");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-user-binfmt");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:qemu-user-static");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2024 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);
flag = 0;
if (rpm_check(release:"AL2", reference:"ivshmem-tools-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-audio-alsa-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-audio-oss-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-audio-pa-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-audio-sdl-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-block-curl-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-block-dmg-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-block-iscsi-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-block-nfs-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", cpu:"x86_64", reference:"qemu-block-rbd-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-block-ssh-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-common-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-debuginfo-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-guest-agent-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-img-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-kvm-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-kvm-core-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-system-aarch64-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-system-aarch64-core-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-system-x86-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-system-x86-core-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-ui-curses-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-ui-gtk-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-ui-sdl-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-user-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-user-binfmt-3.1.0-7.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"qemu-user-static-3.1.0-7.amzn2.0.1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ivshmem-tools / qemu / qemu-audio-alsa / qemu-audio-oss / etc");
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
90.0%