Stefan Esser of e-matters discovered a condition within PHP that may lead to remote execution of arbitrary code. The memory_limit facility is used to notify functions when memory contraints have been met.
Under certain conditions, the entry into this facility is able to interrupt functions such as zend_hash_init() at locations not suitable for interruption. The result would leave these functions in a vulnerable state.
An attacker that is able to trigger the memory_limit abort within zend_hash_init() and is additionally able to control the heap before the HashTable itself is allocated, is able to supply his own HashTable destructor pointer. […]
All mentioned places outside of the extensions are quite easy to exploit, because the memory allocation up to those places is deterministic and quite static throughout different PHP versions.
[…]
Because the exploit itself consist of supplying an arbitrary destructor pointer this bug is exploitable on any platform.
#%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(19143);
script_version("1.20");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
script_cve_id("CVE-2004-0594");
script_bugtraq_id(10725);
script_name(english:"FreeBSD : php -- memory_limit related vulnerability (dd7aa4f1-102f-11d9-8a8a-000c41e2cdad)");
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:
"Stefan Esser of e-matters discovered a condition within PHP that may
lead to remote execution of arbitrary code. The memory_limit facility
is used to notify functions when memory contraints have been met.
Under certain conditions, the entry into this facility is able to
interrupt functions such as zend_hash_init() at locations not suitable
for interruption. The result would leave these functions in a
vulnerable state.
An attacker that is able to trigger the memory_limit abort within
zend_hash_init() and is additionally able to control the heap before
the HashTable itself is allocated, is able to supply his own HashTable
destructor pointer. [...]
All mentioned places outside of the extensions are quite easy to
exploit, because the memory allocation up to those places is
deterministic and quite static throughout different PHP versions.
[...]
Because the exploit itself consist of supplying an arbitrary
destructor pointer this bug is exploitable on any platform."
);
# http://marc.theaimsgroup.com/?l=bugtraq&m=108981780109154
script_set_attribute(
attribute:"see_also",
value:"https://marc.info/?l=bugtraq&m=108981780109154"
);
# http://security.e-matters.de/advisories/112004.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?83c215d0"
);
# https://vuxml.freebsd.org/freebsd/dd7aa4f1-102f-11d9-8a8a-000c41e2cdad.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?9502549c"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
script_set_attribute(attribute:"canvas_package", value:'CANVAS');
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:mod_php4");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:mod_php4-twig");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:mod_php5");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php4");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php4-cgi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php4-cli");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php4-dtc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php4-horde");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php4-nms");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php5");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php5-cgi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:php5-cli");
script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
script_set_attribute(attribute:"vuln_publication_date", value:"2004/07/07");
script_set_attribute(attribute:"patch_publication_date", value:"2004/09/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2005/07/13");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2005-2021 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:"mod_php4-twig<=4.3.7_3")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php4<=4.3.7_3")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php4-cgi<=4.3.7_3")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php4-cli<=4.3.7_3")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php4-dtc<=4.3.7_3")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php4-horde<=4.3.7_3")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php4-nms<=4.3.7_3")) flag++;
if (pkg_test(save_report:TRUE, pkg:"mod_php4<=4.3.7_3,1")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php5<=5.0.0.r3_2")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php5-cgi<=5.0.0.r3_2")) flag++;
if (pkg_test(save_report:TRUE, pkg:"php5-cli<=5.0.0.r3_2")) flag++;
if (pkg_test(save_report:TRUE, pkg:"mod_php5<=5.0.0.r3_2,1")) 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");
Vendor | Product | Version | CPE |
---|---|---|---|
freebsd | freebsd | mod_php4 | p-cpe:/a:freebsd:freebsd:mod_php4 |
freebsd | freebsd | mod_php4-twig | p-cpe:/a:freebsd:freebsd:mod_php4-twig |
freebsd | freebsd | mod_php5 | p-cpe:/a:freebsd:freebsd:mod_php5 |
freebsd | freebsd | php4 | p-cpe:/a:freebsd:freebsd:php4 |
freebsd | freebsd | php4-cgi | p-cpe:/a:freebsd:freebsd:php4-cgi |
freebsd | freebsd | php4-cli | p-cpe:/a:freebsd:freebsd:php4-cli |
freebsd | freebsd | php4-dtc | p-cpe:/a:freebsd:freebsd:php4-dtc |
freebsd | freebsd | php4-horde | p-cpe:/a:freebsd:freebsd:php4-horde |
freebsd | freebsd | php4-nms | p-cpe:/a:freebsd:freebsd:php4-nms |
freebsd | freebsd | php5 | p-cpe:/a:freebsd:freebsd:php5 |