6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
0.033 Low
EPSS
Percentile
91.4%
The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has libssh2 packages installed that are affected by multiple vulnerabilities:
An out of bounds read flaw was discovered in libssh2 before 1.8.1 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
(CVE-2019-3858)
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater than the packet length are parsed.
A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory. (CVE-2019-3861)
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-2019-0252. The text
# itself is copyright (C) ZTE, Inc.
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(132483);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2019-3858", "CVE-2019-3861");
script_bugtraq_id(107485);
script_name(english:"NewStart CGSL CORE 5.05 / MAIN 5.05 : libssh2 Multiple Vulnerabilities (NS-SA-2019-0252)");
script_set_attribute(attribute:"synopsis", value:
"The remote machine is affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has libssh2 packages installed that are affected
by multiple vulnerabilities:
- An out of bounds read flaw was discovered in libssh2
before 1.8.1 when a specially crafted SFTP packet is
received from the server. A remote attacker who
compromises a SSH server may be able to cause a Denial
of Service or read data in the client memory.
(CVE-2019-3858)
- An out of bounds read flaw was discovered in libssh2
before 1.8.1 in the way SSH packets with a padding
length value greater than the packet length are parsed.
A remote attacker who compromises a SSH server may be
able to cause a Denial of Service or read data in the
client memory. (CVE-2019-3861)
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-2019-0252");
script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL libssh2 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:N/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:N/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-2019-3861");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21");
script_set_attribute(attribute:"patch_publication_date", value:"2019/12/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/31");
script_set_attribute(attribute:"plugin_type", value:"local");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"NewStart CGSL Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2021 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);
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 CORE 5.05" &&
release !~ "CGSL MAIN 5.05")
audit(AUDIT_OS_NOT, 'NewStart CGSL CORE 5.05 / NewStart CGSL MAIN 5.05');
if (!get_kb_item("Host/ZTE-CGSL/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
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);
flag = 0;
pkgs = {
"CGSL CORE 5.05": [
"libssh2-1.8.0-3.el7",
"libssh2-debuginfo-1.8.0-3.el7",
"libssh2-devel-1.8.0-3.el7",
"libssh2-docs-1.8.0-3.el7"
],
"CGSL MAIN 5.05": [
"libssh2-1.8.0-3.el7",
"libssh2-debuginfo-1.8.0-3.el7",
"libssh2-devel-1.8.0-3.el7",
"libssh2-docs-1.8.0-3.el7"
]
};
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_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libssh2");
}
6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
0.033 Low
EPSS
Percentile
91.4%