CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%
The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2022:0727-1 advisory.
A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows a local user on a vulnerable system to unmount other users’ filesystems that are either world-writable themselves (like /tmp) or mounted in a world-writable directory. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems. (CVE-2021-3996)
A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows an unprivileged local attacker to unmount FUSE filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker in its string form. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems. (CVE-2021-3995)
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
# openSUSE Security Update openSUSE-SU-2022:0727-1. The text itself
# is copyright (C) SUSE.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(158640);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/06");
script_cve_id("CVE-2021-3995", "CVE-2021-3996");
script_name(english:"openSUSE 15 Security Update : libeconf, shadow and util-linux (openSUSE-SU-2022:0727-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in
the openSUSE-SU-2022:0727-1 advisory.
- A logic error was found in the libmount library of util-linux in the function that allows an unprivileged
user to unmount a FUSE filesystem. This flaw allows a local user on a vulnerable system to unmount other
users' filesystems that are either world-writable themselves (like /tmp) or mounted in a world-writable
directory. An attacker may use this flaw to cause a denial of service to applications that use the
affected filesystems. (CVE-2021-3996)
- A logic error was found in the libmount library of util-linux in the function that allows an unprivileged
user to unmount a FUSE filesystem. This flaw allows an unprivileged local attacker to unmount FUSE
filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker
in its string form. An attacker may use this flaw to cause a denial of service to applications that use
the affected filesystems. (CVE-2021-3995)
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://bugzilla.suse.com/1188507");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1192954");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1193632");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1194976");
# https://lists.opensuse.org/archives/list/[email protected]/thread/GUBUSLRBG42MLRL65HHMLIWQIKS3SKKP/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?630d9106");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3995");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3996");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-2021-3996");
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:"2022/03/04");
script_set_attribute(attribute:"patch_publication_date", value:"2022/03/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/05");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libblkid-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libblkid-devel-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libblkid-devel-static");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libblkid1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libblkid1-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libeconf-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libeconf0");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libeconf0-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libfdisk-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libfdisk-devel-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libfdisk-devel-static");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libfdisk1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libfdisk1-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libmount-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libmount-devel-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libmount-devel-static");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libmount1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libmount1-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libsmartcols-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libsmartcols-devel-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libsmartcols-devel-static");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libsmartcols1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libsmartcols1-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuuid-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuuid-devel-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuuid-devel-static");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuuid1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libuuid1-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:login_defs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-libmount");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:shadow");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:util-linux");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:util-linux-lang");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:util-linux-systemd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:uuidd");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.3");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
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/SuSE/release');
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, 'openSUSE');
var os_ver = pregmatch(pattern: "^SUSE([\d.]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'openSUSE');
os_ver = os_ver[1];
if (release !~ "^(SUSE15\.3)$") audit(AUDIT_OS_RELEASE_NOT, 'openSUSE', '15.3', release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'openSUSE ' + os_ver, cpu);
var pkgs = [
{'reference':'libblkid-devel-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid-devel-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid-devel-static-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid1-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid1-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libeconf-devel-0.4.4+git20220104.962774f-150300.3.6.2', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libeconf0-0.4.4+git20220104.962774f-150300.3.6.2', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libeconf0-32bit-0.4.4+git20220104.962774f-150300.3.6.2', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-devel-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-devel-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-devel-static-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk1-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk1-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-devel-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-devel-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-devel-static-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount1-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount1-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-devel-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-devel-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-devel-static-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols1-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols1-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-devel-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-devel-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-devel-static-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid1-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid1-32bit-2.36.2-150300.4.14.3', 'cpu':'x86_64', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'login_defs-4.8.1-150300.4.3.8', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-libmount-2.36.2-150300.4.14.2', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'shadow-4.8.1-150300.4.3.8', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-lang-2.36.2-150300.4.14.3', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-systemd-2.36.2-150300.4.14.2', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE},
{'reference':'uuidd-2.36.2-150300.4.14.2', 'release':'SUSE15.3', 'rpm_spec_vers_cmp':TRUE}
];
var flag = 0;
foreach package_array ( pkgs ) {
var reference = NULL;
var release = NULL;
var cpu = NULL;
var rpm_spec_vers_cmp = 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['cpu'])) cpu = package_array['cpu'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (reference && release) {
if (rpm_check(release:release, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) 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, 'libblkid-devel / libblkid-devel-32bit / libblkid-devel-static / etc');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3995
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3996
www.nessus.org/u?630d9106
bugzilla.suse.com/1188507
bugzilla.suse.com/1192954
bugzilla.suse.com/1193632
bugzilla.suse.com/1194976
www.suse.com/security/cve/CVE-2021-3995
www.suse.com/security/cve/CVE-2021-3996
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%