Debian DLA-997-1 : libffi security update (Stack Clash)

2017-06-22T00:00:00
ID DEBIAN_DLA-997.NASL
Type nessus
Reporter Tenable
Modified 2018-01-29T00:00:00

Description

libffi requests an executable stack allowing attackers to more easily trigger arbitrary code execution by overwriting the stack. Please note that libffi is used by a number of other libraries.

For Debian 7 'Wheezy', these problems have been fixed in version 3.0.10-3+deb7u1.

We recommend that you upgrade your libffi packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-997-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(100966);
  script_version("$Revision: 3.8 $");
  script_cvs_date("$Date: 2018/01/29 14:31:20 $");

  script_cve_id("CVE-2017-1000376");
  script_osvdb_id(159407);

  script_name(english:"Debian DLA-997-1 : libffi security update (Stack Clash)");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"libffi requests an executable stack allowing attackers to more easily
trigger arbitrary code execution by overwriting the stack. Please note
that libffi is used by a number of other libraries.

For Debian 7 'Wheezy', these problems have been fixed in version
3.0.10-3+deb7u1.

We recommend that you upgrade your libffi packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2017/06/msg00026.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/libffi"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:ND/RC:UC");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:X/RC:U");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lib32ffi-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lib32ffi5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lib64ffi-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lib64ffi5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libffi-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libffi5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libffi5-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libffi5-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libn32ffi-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libn32ffi5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/21");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/22");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"7.0", prefix:"lib32ffi-dev", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"lib32ffi5", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"lib64ffi-dev", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"lib64ffi5", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libffi-dev", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libffi5", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libffi5-dbg", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libffi5-udeb", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libn32ffi-dev", reference:"3.0.10-3+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libn32ffi5", reference:"3.0.10-3+deb7u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");