The remote SUSE Linux SUSE15 host has packages installed that are affected by a vulnerability as referenced in the openSUSE-SU-2021:1400-1 advisory.
/.flatpak-info
or make that file disappear entirely. Flatpak apps that act as clients for AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can escalate the privileges that the corresponding services will believe the Flatpak app has. Note that protocols that operate entirely over the D-Bus session bus (user bus), system bus or accessibility bus are not affected by this. This is due to the use of a proxy process xdg-dbus-proxy
, whose VFS cannot be manipulated by the Flatpak app, when interacting with these buses. Patches exist for versions 1.10.4 and 1.12.0, and as of time of publication, a patch for version 1.8.2 is being planned. There are no workarounds aside from upgrading to a patched version. (CVE-2021-41133)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-2021:1400-1. The text itself
# is copyright (C) SUSE.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(154759);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/11/01");
script_cve_id("CVE-2021-41133");
script_name(english:"openSUSE 15 Security Update : flatpak (openSUSE-SU-2021:1400-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SUSE15 host has packages installed that are affected by a vulnerability as referenced in the
openSUSE-SU-2021:1400-1 advisory.
- Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. In
versions prior to 1.10.4 and 1.12.0, Flatpak apps with direct access to AF_UNIX sockets such as those used
by Wayland, Pipewire or pipewire-pulse can trick portals and other host-OS services into treating the
Flatpak app as though it was an ordinary, non-sandboxed host-OS process. They can do this by manipulating
the VFS using recent mount-related syscalls that are not blocked by Flatpak's denylist seccomp filter, in
order to substitute a crafted `/.flatpak-info` or make that file disappear entirely. Flatpak apps that act
as clients for AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can escalate the
privileges that the corresponding services will believe the Flatpak app has. Note that protocols that
operate entirely over the D-Bus session bus (user bus), system bus or accessibility bus are not affected
by this. This is due to the use of a proxy process `xdg-dbus-proxy`, whose VFS cannot be manipulated by
the Flatpak app, when interacting with these buses. Patches exist for versions 1.10.4 and 1.12.0, and as
of time of publication, a patch for version 1.8.2 is being planned. There are no workarounds aside from
upgrading to a patched version. (CVE-2021-41133)
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/1191507");
# https://lists.opensuse.org/archives/list/[email protected]/thread/O63MYUSWLBDBHWT5CBFN7YN5WUMCT6NS/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?51996a13");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-41133");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/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: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-2021-41133");
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:"2021/10/08");
script_set_attribute(attribute:"patch_publication_date", value:"2021/10/31");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/01");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:flatpak");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:flatpak-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:flatpak-zsh-completion");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libflatpak0");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:system-user-flatpak");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:typelib-1_0-Flatpak-1_0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.2");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021 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\.2)$") audit(AUDIT_OS_RELEASE_NOT, 'openSUSE', '15.2', release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'openSUSE ' + os_ver, cpu);
var pkgs = [
{'reference':'flatpak-1.10.5-lp152.3.9.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'flatpak-devel-1.10.5-lp152.3.9.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'flatpak-zsh-completion-1.10.5-lp152.3.9.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libflatpak0-1.10.5-lp152.3.9.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'system-user-flatpak-1.10.5-lp152.3.9.1', 'cpu':'x86_64', 'release':'SUSE15.2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'typelib-1_0-Flatpak-1_0-1.10.5-lp152.3.9.1', 'cpu':'x86_64', 'release':'SUSE15.2', '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, 'flatpak / flatpak-devel / flatpak-zsh-completion / libflatpak0 / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
novell | opensuse | flatpak | p-cpe:/a:novell:opensuse:flatpak |
novell | opensuse | flatpak-devel | p-cpe:/a:novell:opensuse:flatpak-devel |
novell | opensuse | flatpak-zsh-completion | p-cpe:/a:novell:opensuse:flatpak-zsh-completion |
novell | opensuse | libflatpak0 | p-cpe:/a:novell:opensuse:libflatpak0 |
novell | opensuse | system-user-flatpak | p-cpe:/a:novell:opensuse:system-user-flatpak |
novell | opensuse | typelib-1_0-flatpak-1_0 | p-cpe:/a:novell:opensuse:typelib-1_0-flatpak-1_0 |
novell | opensuse | 15.2 | cpe:/o:novell:opensuse:15.2 |