CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
80.7%
The remote NewStart CGSL host, running version MAIN 6.02, has unbound packages installed that are affected by multiple vulnerabilities:
DISPUTED Unbound before 1.9.5 allows an integer overflow in the regional allocator via regional_alloc. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25032)
DISPUTED Unbound before 1.9.5 allows an integer overflow in sldns_str2wire_dname_buf_origin, leading to an out-of-bounds write. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25034)
DISPUTED Unbound before 1.9.5 allows an out-of-bounds write in sldns_bget_token_par. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25035)
DISPUTED Unbound before 1.9.5 allows an assertion failure and denial of service in synth_cname.
NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25036)
DISPUTED Unbound before 1.9.5 allows an assertion failure and denial of service in dname_pkt_copy via an invalid packet. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25037)
DISPUTED Unbound before 1.9.5 allows an integer overflow in a size calculation in dnscrypt/dnscrypt.c. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25038)
DISPUTED Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c.
NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25039)
DISPUTED Unbound before 1.9.5 allows an infinite loop via a compressed name in dname_pkt_copy. NOTE:
The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25040)
DISPUTED Unbound before 1.9.5 allows an assertion failure via a compressed name in dname_pkt_copy.
NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25041)
DISPUTED Unbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy.
NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25042)
NLnet Labs Unbound, up to and including version 1.12.0, and NLnet Labs NSD, up to and including version 4.3.3, contain a local vulnerability that would allow for a local symlink attack. When writing the PID file, Unbound and NSD create the file if it is not there, or open an existing file for writing. In case the file was already present, they would follow symlinks if the file happened to be a symlink instead of a regular file. An additional chown of the file would then take place after it was written, making the user Unbound/NSD is supposed to run as the new owner of the file. If an attacker has local access to the user Unbound/NSD runs as, she could create a symlink in place of the PID file pointing to a file that she would like to erase. If then Unbound/NSD is killed and the PID file is not cleared, upon restarting with root privileges, Unbound/NSD will rewrite any file pointed at by the symlink. This is a local vulnerability that could create a Denial of Service of the system Unbound/NSD is running on. It requires an attacker having access to the limited permission user Unbound/NSD runs as and point through the symlink to a critical file on the system. (CVE-2020-28935)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2022-0064. The text
# itself is copyright (C) ZTE, Inc.
##
include('compat.inc');
if (description)
{
script_id(160818);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/09");
script_cve_id(
"CVE-2019-25032",
"CVE-2019-25034",
"CVE-2019-25035",
"CVE-2019-25036",
"CVE-2019-25037",
"CVE-2019-25038",
"CVE-2019-25039",
"CVE-2019-25040",
"CVE-2019-25041",
"CVE-2019-25042",
"CVE-2020-28935"
);
script_name(english:"NewStart CGSL MAIN 6.02 : unbound Multiple Vulnerabilities (NS-SA-2022-0064)");
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 unbound packages installed that are affected by multiple
vulnerabilities:
- ** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in the regional allocator via
regional_alloc. NOTE: The vendor disputes that this is a vulnerability. Although the code may be
vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25032)
- ** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in sldns_str2wire_dname_buf_origin, leading
to an out-of-bounds write. NOTE: The vendor disputes that this is a vulnerability. Although the code may
be vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25034)
- ** DISPUTED ** Unbound before 1.9.5 allows an out-of-bounds write in sldns_bget_token_par. NOTE: The
vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound
installation cannot be remotely or locally exploited. (CVE-2019-25035)
- ** DISPUTED ** Unbound before 1.9.5 allows an assertion failure and denial of service in synth_cname.
NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running
Unbound installation cannot be remotely or locally exploited. (CVE-2019-25036)
- ** DISPUTED ** Unbound before 1.9.5 allows an assertion failure and denial of service in dname_pkt_copy
via an invalid packet. NOTE: The vendor disputes that this is a vulnerability. Although the code may be
vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25037)
- ** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in a size calculation in
dnscrypt/dnscrypt.c. NOTE: The vendor disputes that this is a vulnerability. Although the code may be
vulnerable, a running Unbound installation cannot be remotely or locally exploited. (CVE-2019-25038)
- ** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c.
NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running
Unbound installation cannot be remotely or locally exploited. (CVE-2019-25039)
- ** DISPUTED ** Unbound before 1.9.5 allows an infinite loop via a compressed name in dname_pkt_copy. NOTE:
The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound
installation cannot be remotely or locally exploited. (CVE-2019-25040)
- ** DISPUTED ** Unbound before 1.9.5 allows an assertion failure via a compressed name in dname_pkt_copy.
NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running
Unbound installation cannot be remotely or locally exploited. (CVE-2019-25041)
- ** DISPUTED ** Unbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy.
NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running
Unbound installation cannot be remotely or locally exploited. (CVE-2019-25042)
- NLnet Labs Unbound, up to and including version 1.12.0, and NLnet Labs NSD, up to and including version
4.3.3, contain a local vulnerability that would allow for a local symlink attack. When writing the PID
file, Unbound and NSD create the file if it is not there, or open an existing file for writing. In case
the file was already present, they would follow symlinks if the file happened to be a symlink instead of a
regular file. An additional chown of the file would then take place after it was written, making the user
Unbound/NSD is supposed to run as the new owner of the file. If an attacker has local access to the user
Unbound/NSD runs as, she could create a symlink in place of the PID file pointing to a file that she would
like to erase. If then Unbound/NSD is killed and the PID file is not cleared, upon restarting with root
privileges, Unbound/NSD will rewrite any file pointed at by the symlink. This is a local vulnerability
that could create a Denial of Service of the system Unbound/NSD is running on. It requires an attacker
having access to the limited permission user Unbound/NSD runs as and point through the symlink to a
critical file on the system. (CVE-2020-28935)
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:"http://security.gd-linux.com/notice/NS-SA-2022-0064");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25032");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25034");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25035");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25036");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25037");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25038");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25039");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25040");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25041");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2019-25042");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2020-28935");
script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL unbound packages. Note that updated packages may not be available yet. Please contact ZTE
for more information.");
script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/PR:N/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-2019-25042");
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:"2020/12/07");
script_set_attribute(attribute:"patch_publication_date", value:"2022/05/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/09");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:python3-unbound");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:python3-unbound-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:unbound");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:unbound-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:unbound-debugsource");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:unbound-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:unbound-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:unbound-libs-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) 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/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");
exit(0);
}
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': [
'python3-unbound-1.7.3-15.el8',
'python3-unbound-debuginfo-1.7.3-15.el8',
'unbound-1.7.3-15.el8',
'unbound-debuginfo-1.7.3-15.el8',
'unbound-debugsource-1.7.3-15.el8',
'unbound-devel-1.7.3-15.el8',
'unbound-libs-1.7.3-15.el8',
'unbound-libs-debuginfo-1.7.3-15.el8'
]
};
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_HOLE,
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, 'unbound');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25032
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25034
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25035
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25036
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25037
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25038
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25039
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25040
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25041
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25042
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28935
security.gd-linux.com/info/CVE-2019-25032
security.gd-linux.com/info/CVE-2019-25034
security.gd-linux.com/info/CVE-2019-25035
security.gd-linux.com/info/CVE-2019-25036
security.gd-linux.com/info/CVE-2019-25037
security.gd-linux.com/info/CVE-2019-25038
security.gd-linux.com/info/CVE-2019-25039
security.gd-linux.com/info/CVE-2019-25040
security.gd-linux.com/info/CVE-2019-25041
security.gd-linux.com/info/CVE-2019-25042
security.gd-linux.com/info/CVE-2020-28935
security.gd-linux.com/notice/NS-SA-2022-0064
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
80.7%