7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.9 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
52.5%
The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-68df3f4b02 advisory.
A flaw was found in the QEMU Guest Agent service for Windows. A local unprivileged user may be able to manipulate the QEMU Guest Agent’s Windows installer via repair custom actions to elevate their privileges on the system. (CVE-2023-0664)
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service. (CVE-2023-3354)
A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the inflate_buffer
function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service. (CVE-2023-3255)
A flaw was found in the QEMU virtual crypto device while handling data encryption/decryption requests in virtio_crypto_handle_sym_req. There is no check for the value of src_len
and dst_len
in virtio_crypto_sym_op_helper, potentially leading to a heap buffer overflow when the two values differ.
(CVE-2023-3180)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
# The descriptive text and package checks in this plugin were
# extracted from Fedora Security Advisory FEDORA-2023-68df3f4b02
#
include('compat.inc');
if (description)
{
script_id(180225);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/29");
script_cve_id(
"CVE-2023-0664",
"CVE-2023-3180",
"CVE-2023-3255",
"CVE-2023-3354"
);
script_xref(name:"IAVB", value:"2023-B-0019-S");
script_xref(name:"FEDORA", value:"2023-68df3f4b02");
script_xref(name:"IAVB", value:"2023-B-0058-S");
script_xref(name:"IAVB", value:"2023-B-0073-S");
script_name(english:"Fedora 38 : qemu (2023-68df3f4b02)");
script_set_attribute(attribute:"synopsis", value:
"The remote Fedora host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the
FEDORA-2023-68df3f4b02 advisory.
- A flaw was found in the QEMU Guest Agent service for Windows. A local unprivileged user may be able to
manipulate the QEMU Guest Agent's Windows installer via repair custom actions to elevate their privileges
on the system. (CVE-2023-0664)
- A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks
whether the current number of connections crosses a certain threshold and if so, cleans up the previous
connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the
connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated
client to cause a denial of service. (CVE-2023-3354)
- A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit
condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the
`inflate_buffer` function. This could allow a remote authenticated client who is able to send a clipboard
to the VNC server to trigger a denial of service. (CVE-2023-3255)
- A flaw was found in the QEMU virtual crypto device while handling data encryption/decryption requests in
virtio_crypto_handle_sym_req. There is no check for the value of `src_len` and `dst_len` in
virtio_crypto_sym_op_helper, potentially leading to a heap buffer overflow when the two values differ.
(CVE-2023-3180)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://bodhi.fedoraproject.org/updates/FEDORA-2023-68df3f4b02");
script_set_attribute(attribute:"solution", value:
"Update the affected 2:qemu package.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/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:L/AC:L/PR:L/UI:N/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-2023-0664");
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:"2023/03/29");
script_set_attribute(attribute:"patch_publication_date", value:"2023/08/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/29");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:38");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:qemu");
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_family(english:"Fedora Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Fedora' >!< os_release) audit(AUDIT_OS_NOT, 'Fedora');
var os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Fedora');
os_ver = os_ver[1];
if (! preg(pattern:"^38([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Fedora 38', 'Fedora ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Fedora', cpu);
var pkgs = [
{'reference':'qemu-7.2.5-1.fc38', 'release':'FC38', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = 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['sp'])) sp = package_array['sp'];
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['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (reference && _release) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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, 'qemu');
}
Vendor | Product | Version | CPE |
---|---|---|---|
fedoraproject | fedora | 38 | cpe:/o:fedoraproject:fedora:38 |
fedoraproject | fedora | qemu | p-cpe:/a:fedoraproject:fedora:qemu |
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.9 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
52.5%