7.5 High
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
9.8 High
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
8.1 High
AI Score
Confidence
Low
0.15 Low
EPSS
Percentile
95.8%
curl security problems :
CVE-2018-16890: NTLM type-2 out-of-bounds buffer read
libcurl contains a heap buffer out-of-bounds read flaw.
The function handling incoming NTLM type-2 messages (lib/vauth/ntlm.c:ntlm_decode_type2_target) does not validate incoming data correctly and is subject to an integer overflow vulnerability.
Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.
CVE-2019-3822: NTLMv2 type-3 header stack-based buffer overflow
libcurl contains a stack based buffer overflow vulnerability.
The function creating an outgoing NTLM type-3 header (lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()), generates the request HTTP header contents based on previously received data.
The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening.
This output data can grow larger than the local buffer if very large ‘nt response’ data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server.
Such a ‘large value’ needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.
CVE-2019-3823: SMTP end-of-response out-of-bounds read
libcurl contains a heap out-of-bounds read in the code handling the end-of-response for SMTP.
If the buffer passed to smtp_endofresp() isn’t NUL terminated and contains no character ending the parsed number, and len is set to 5, then the strtol() call reads beyond the allocated buffer. The read contents will not be returned to the caller.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2022 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
# copyright notice, this list of conditions and the following
# disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
# published online in any format, converted to PDF, PostScript,
# RTF and other formats) must reproduce the above copyright
# notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
include('compat.inc');
if (description)
{
script_id(122042);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/21");
script_cve_id("CVE-2018-16890", "CVE-2019-3822", "CVE-2019-3823");
script_xref(name:"CEA-ID", value:"CEA-2019-0227");
script_name(english:"FreeBSD : curl -- multiple vulnerabilities (714b033a-2b09-11e9-8bc3-610fd6e6cd05)");
script_set_attribute(attribute:"synopsis", value:
"The remote FreeBSD host is missing a security-related update.");
script_set_attribute(attribute:"description", value:
"curl security problems :
CVE-2018-16890: NTLM type-2 out-of-bounds buffer read
libcurl contains a heap buffer out-of-bounds read flaw.
The function handling incoming NTLM type-2 messages
(lib/vauth/ntlm.c:ntlm_decode_type2_target) does not validate incoming
data correctly and is subject to an integer overflow vulnerability.
Using that overflow, a malicious or broken NTLM server could trick
libcurl to accept a bad length + offset combination that would lead to
a buffer read out-of-bounds.
CVE-2019-3822: NTLMv2 type-3 header stack-based buffer overflow
libcurl contains a stack based buffer overflow vulnerability.
The function creating an outgoing NTLM type-3 header
(lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()), generates
the request HTTP header contents based on previously received data.
The check that exists to prevent the local buffer from getting
overflowed is implemented wrongly (using unsigned math) and as such it
does not prevent the overflow from happening.
This output data can grow larger than the local buffer if very large
'nt response' data is extracted from a previous NTLMv2 header provided
by the malicious or broken HTTP server.
Such a 'large value' needs to be around 1000 bytes or more. The actual
payload data copied to the target buffer comes from the NTLMv2 type-2
response header.
CVE-2019-3823: SMTP end-of-response out-of-bounds read
libcurl contains a heap out-of-bounds read in the code handling the
end-of-response for SMTP.
If the buffer passed to smtp_endofresp() isn't NUL terminated and
contains no character ending the parsed number, and len is set to 5,
then the strtol() call reads beyond the allocated buffer. The read
contents will not be returned to the caller.");
script_set_attribute(attribute:"see_also", value:"https://curl.haxx.se/docs/security.html");
script_set_attribute(attribute:"see_also", value:"https://curl.haxx.se/docs/CVE-2018-16890.html");
script_set_attribute(attribute:"see_also", value:"https://curl.haxx.se/docs/CVE-2019-3822.html");
script_set_attribute(attribute:"see_also", value:"https://curl.haxx.se/docs/CVE-2019-3823.html");
# https://vuxml.freebsd.org/freebsd/714b033a-2b09-11e9-8bc3-610fd6e6cd05.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?340e0493");
script_set_attribute(attribute:"solution", value:
"Update the affected package.");
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:POC/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:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3822");
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:"2019/02/07");
script_set_attribute(attribute:"patch_publication_date", value:"2019/02/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/08");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:curl");
script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"FreeBSD Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");
exit(0);
}
include("audit.inc");
include("freebsd_package.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (pkg_test(save_report:TRUE, pkg:"curl<7.64.0")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get());
else security_hole(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16890
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3822
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3823
www.nessus.org/u?340e0493
curl.haxx.se/docs/CVE-2018-16890.html
curl.haxx.se/docs/CVE-2019-3822.html
curl.haxx.se/docs/CVE-2019-3823.html
curl.haxx.se/docs/security.html
7.5 High
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
9.8 High
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
8.1 High
AI Score
Confidence
Low
0.15 Low
EPSS
Percentile
95.8%