CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
EPSS
Percentile
89.5%
Simon Tatham reports :
This [0.63] release fixes multiple security holes in previous versions of PuTTY, which can allow an SSH-2 server to make PuTTY overrun or underrun buffers and crash. […]
These vulnerabilities can be triggered before host key verification, which means that you are not even safe if you trust the server you think you’re connecting to, since it could be spoofed over the network and the host key check would not detect this before the attack could take place.
Additionally, when PuTTY authenticated with a user’s private key, the private key or information equivalent to it was accidentally kept in PuTTY’s memory for the rest of its run, where it could be retrieved by other processes reading PuTTY’s memory, or written out to swap files or crash dumps. This release fixes that as well.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2018 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('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(69250);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
script_cve_id("CVE-2013-4206", "CVE-2013-4207", "CVE-2013-4208", "CVE-2013-4852");
script_name(english:"FreeBSD : PuTTY -- Four security holes in versions before 0.63 (4b448a96-ff73-11e2-b28d-080027ef73ec)");
script_summary(english:"Checks for updated package in pkg_info output");
script_set_attribute(
attribute:"synopsis",
value:"The remote FreeBSD host is missing a security-related update."
);
script_set_attribute(
attribute:"description",
value:
"Simon Tatham reports :
This [0.63] release fixes multiple security holes in previous versions
of PuTTY, which can allow an SSH-2 server to make PuTTY overrun or
underrun buffers and crash. [...]
These vulnerabilities can be triggered before host key verification,
which means that you are not even safe if you trust the server you
think you're connecting to, since it could be spoofed over the network
and the host key check would not detect this before the attack could
take place.
Additionally, when PuTTY authenticated with a user's private key, the
private key or information equivalent to it was accidentally kept in
PuTTY's memory for the rest of its run, where it could be retrieved by
other processes reading PuTTY's memory, or written out to swap files
or crash dumps. This release fixes that as well."
);
# http://lists.tartarus.org/pipermail/putty-announce/2013/000018.html
script_set_attribute(
attribute:"see_also",
value:"https://lists.tartarus.org/pipermail/putty-announce/2013/000018.html"
);
# http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?c3596240"
);
# http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-bignum-division-by-zero.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?8a13ea52"
);
# http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?c6c65842"
);
# http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-signature-stringlen.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?84700181"
);
# https://vuxml.freebsd.org/freebsd/4b448a96-ff73-11e2-b28d-080027ef73ec.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?c4e0284f"
);
script_set_attribute(attribute:"solution", value:"Update the affected package.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:putty");
script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
script_set_attribute(attribute:"vuln_publication_date", value:"2013/07/08");
script_set_attribute(attribute:"patch_publication_date", value:"2013/08/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/08/08");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"FreeBSD Local Security Checks");
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:"putty<0.63")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get());
else security_warning(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4206
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4207
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4208
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4852
www.nessus.org/u?84700181
www.nessus.org/u?8a13ea52
www.nessus.org/u?c3596240
www.nessus.org/u?c4e0284f
www.nessus.org/u?c6c65842
lists.tartarus.org/pipermail/putty-announce/2013/000018.html