CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
26.7%
Prasad J Pandit, Red Hat Product Security Team, reports :
Qemu emulator built with the Rocker switch emulation support is vulnerable to an off-by-one error. It happens while processing transmit(tx) descriptors in ‘tx_consume’ routine, if a descriptor was to have more than allowed (ROCKER_TX_FRAGS_MAX=16) fragments.
A privileged user inside guest could use this flaw to cause memory leakage on the host or crash the Qemu process instance resulting in DoS issue.
#%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(87686);
script_version("2.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2015-8701");
script_name(english:"FreeBSD : qemu -- denial of service vulnerability in Rocker switch emulation (1384f2fd-b1be-11e5-9728-002590263bf5)");
script_summary(english:"Checks for updated packages in pkg_info output");
script_set_attribute(
attribute:"synopsis",
value:
"The remote FreeBSD host is missing one or more security-related
updates."
);
script_set_attribute(
attribute:"description",
value:
"Prasad J Pandit, Red Hat Product Security Team, reports :
Qemu emulator built with the Rocker switch emulation support is
vulnerable to an off-by-one error. It happens while processing
transmit(tx) descriptors in 'tx_consume' routine, if a descriptor was
to have more than allowed (ROCKER_TX_FRAGS_MAX=16) fragments.
A privileged user inside guest could use this flaw to cause memory
leakage on the host or crash the Qemu process instance resulting in
DoS issue."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205813"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205814"
);
# http://www.openwall.com/lists/oss-security/2015/12/28/6
script_set_attribute(
attribute:"see_also",
value:"https://www.openwall.com/lists/oss-security/2015/12/28/6"
);
script_set_attribute(
attribute:"see_also",
value:"https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html"
);
# http://git.qemu.org/?p=qemu.git;a=commit;h=007cd223de527b5f41278f2d886c1a4beb3e67aa
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?696c2bf0"
);
# https://github.com/seanbruno/qemu-bsd-user/commit/007cd223de527b5f41278f2d886c1a4beb3e67aa
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?3ca6c124"
);
# https://vuxml.freebsd.org/freebsd/1384f2fd-b1be-11e5-9728-002590263bf5.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?8884fec2"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:qemu");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:qemu-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:qemu-sbruno");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:qemu-user-static");
script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
script_set_attribute(attribute:"vuln_publication_date", value:"2015/12/28");
script_set_attribute(attribute:"patch_publication_date", value:"2016/01/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/04");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2021 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:"qemu<2.5.50")) flag++;
if (pkg_test(save_report:TRUE, pkg:"qemu-devel<2.5.50")) flag++;
if (pkg_test(save_report:TRUE, pkg:"qemu-sbruno<2.5.50.g20160213")) flag++;
if (pkg_test(save_report:TRUE, pkg:"qemu-user-static<2.5.50.g20160213")) flag++;
if (flag)
{
if (report_verbosity > 0) security_note(port:0, extra:pkg_report_get());
else security_note(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8701
www.nessus.org/u?3ca6c124
www.nessus.org/u?696c2bf0
www.nessus.org/u?8884fec2
bugs.freebsd.org/bugzilla/show_bug.cgi?id=205813
bugs.freebsd.org/bugzilla/show_bug.cgi?id=205814
lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html
www.openwall.com/lists/oss-security/2015/12/28/6
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
26.7%