The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2020:1358 advisory.
An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host. (CVE-2020-1711)
tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code. (CVE-2020-7039)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2020:1358.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(157617);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/06");
script_cve_id("CVE-2020-1711", "CVE-2020-7039");
script_xref(name:"ALSA", value:"2020:1358");
script_name(english:"AlmaLinux 8 : virt:rhel (ALSA-2020:1358)");
script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-2020:1358 advisory.
- An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions
2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical
Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the
QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of
the QEMU process on the host. (CVE-2020-1711)
- tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC
DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which
can lead to a DoS or potential execute arbitrary code. (CVE-2020-7039)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://errata.almalinux.org/8/ALSA-2020-1358.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-7039");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-1711");
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:"2020/01/16");
script_set_attribute(attribute:"patch_publication_date", value:"2020/04/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/09");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libiscsi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libiscsi-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libiscsi-utils");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:netcf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:netcf-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:netcf-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:sgabios");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Alma Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");
exit(0);
}
include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/AlmaLinux/release');
if (isnull(release) || 'AlmaLinux' >!< release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
var os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 8.x', 'AlmaLinux ' + os_ver);
if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);
var module_ver = get_kb_item('Host/AlmaLinux/appstream/virt-devel');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module virt-devel:rhel');
if ('rhel' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module virt-devel:' + module_ver);
var appstreams = {
'virt-devel:rhel': [
{'reference':'libiscsi-1.18.0-8.module_el8.3.0+2048+e7a0a3ea', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libiscsi-devel-1.18.0-8.module_el8.3.0+2048+e7a0a3ea', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libiscsi-utils-1.18.0-8.module_el8.3.0+2048+e7a0a3ea', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'netcf-0.2.8-12.module_el8.3.0+2048+e7a0a3ea', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'netcf-devel-0.2.8-12.module_el8.3.0+2048+e7a0a3ea', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'netcf-libs-0.2.8-12.module_el8.3.0+2048+e7a0a3ea', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'sgabios-0.20170427git-3.module_el8.3.0+2048+e7a0a3ea', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
]
};
var flag = 0;
var appstreams_found = 0;
foreach module (keys(appstreams)) {
var appstream = NULL;
var appstream_name = NULL;
var appstream_version = NULL;
var appstream_split = split(module, sep:':', keep:FALSE);
if (!empty_or_null(appstream_split)) {
appstream_name = appstream_split[0];
appstream_version = appstream_split[1];
if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/AlmaLinux/appstream/' + appstream_name);
}
if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
appstreams_found++;
foreach package_array ( appstreams[module] ) {
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;
var exists_check = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) release = 'Alma-' + 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 (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && release && (!exists_check || rpm_exists(release:release, rpm:exists_check))) {
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 (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module virt-devel:rhel');
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, 'libiscsi / libiscsi-devel / libiscsi-utils / netcf / netcf-devel / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
alma | linux | libiscsi | p-cpe:/a:alma:linux:libiscsi |
alma | linux | libiscsi-devel | p-cpe:/a:alma:linux:libiscsi-devel |
alma | linux | libiscsi-utils | p-cpe:/a:alma:linux:libiscsi-utils |
alma | linux | netcf | p-cpe:/a:alma:linux:netcf |
alma | linux | netcf-devel | p-cpe:/a:alma:linux:netcf-devel |
alma | linux | netcf-libs | p-cpe:/a:alma:linux:netcf-libs |
alma | linux | sgabios | p-cpe:/a:alma:linux:sgabios |
alma | linux | 8 | cpe:/o:alma:linux:8 |