The remote NewStart CGSL host, running version MAIN 6.02, has docker-ce packages installed that are affected by multiple vulnerabilities:
In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in which access to remapped root allows privilege escalation to real root. When using --userns-remap, if the root user in the remapped namespace has access to the host filesystem they can modify files under /var/lib/docker/<remapping> that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user. (CVE-2021-21284)
In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches that prevent the daemon from crashing. (CVE-2021-21285)
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 descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2021-0124. The text
# itself is copyright (C) ZTE, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(154474);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/10/27");
script_cve_id("CVE-2021-21284", "CVE-2021-21285");
script_name(english:"NewStart CGSL MAIN 6.02 : docker-ce Multiple Vulnerabilities (NS-SA-2021-0124)");
script_set_attribute(attribute:"synopsis", value:
"The remote NewStart CGSL host is affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version MAIN 6.02, has docker-ce packages installed that are affected by multiple
vulnerabilities:
- In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in
which access to remapped root allows privilege escalation to real root. When using --userns-remap, if
the root user in the remapped namespace has access to the host filesystem they can modify files under
/var/lib/docker/<remapping> that cause writing files with extended privileges. Versions 20.10.3 and
19.03.15 contain patches that prevent privilege escalation from remapped user. (CVE-2021-21284)
- In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally
malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches
that prevent the daemon from crashing. (CVE-2021-21285)
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:"http://security.gd-linux.com/notice/NS-SA-2021-0124");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2021-21284");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2021-21285");
script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL docker-ce packages. Note that updated packages may not be available yet. Please contact ZTE
for more information.");
script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:S/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-21284");
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:"2021/02/02");
script_set_attribute(attribute:"patch_publication_date", value:"2021/09/24");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/27");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:docker-ce");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:docker-ce-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_main:6");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"NewStart CGSL 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/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");
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);
var release = get_kb_item('Host/ZTE-CGSL/release');
if (isnull(release) || release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, 'NewStart Carrier Grade Server Linux');
if (release !~ "CGSL MAIN 6.02")
audit(AUDIT_OS_NOT, 'NewStart CGSL MAIN 6.02');
if (!get_kb_item('Host/ZTE-CGSL/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'NewStart Carrier Grade Server Linux', cpu);
var flag = 0;
var pkgs = {
'CGSL MAIN 6.02': [
'docker-ce-17.03.3-1.el8.2104170426gitdb432fd',
'docker-ce-debuginfo-17.03.3-1.el8.2104170426gitdb432fd'
]
};
var pkg_list = pkgs[release];
foreach (pkg in pkg_list)
if (rpm_check(release:'ZTE ' + release, reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_NOTE,
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, 'docker-ce');
}