Debian DLA-1026-1 : xorg-server security update

2017-07-17T00:00:00
ID DEBIAN_DLA-1026.NASL
Type nessus
Reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2017-07-17T00:00:00

Description

CVE-2017-10971

    A user authenticated to an X Session could crash or

execute code in the context of the X Server by exploiting a stack overflow in the endianness conversion of X Events.

CVE-2017-10972

    Uninitialized data in endianness conversion in the

XEvent handling of the X.Org X Server allowed authenticated malicious users to access potentially privileged data from the X server.

For Debian 7

                                        
                                            #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1026-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(101552);
  script_version("3.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2017-10971", "CVE-2017-10972");

  script_name(english:"Debian DLA-1026-1 : xorg-server security update");
  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:
"CVE-2017-10971

        A user authenticated to an X Session could crash or
execute code in the context of the X Server by exploiting a stack
overflow in the endianness conversion of X Events.

CVE-2017-10972

        Uninitialized data in endianness conversion in the
XEvent handling of the         X.Org X Server allowed
authenticated malicious users to access potentially privileged data
from the X server. 

For Debian 7 'Wheezy', these problems have been fixed in version
2:1.12.4-6+deb7u7.

We recommend that you upgrade your xorg-server 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/2017/07/msg00018.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/xorg-server"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  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:xdmx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xdmx-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xnest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xephyr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xfbdev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-core-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-core-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xvfb");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/07/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/17");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  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:"xdmx", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xdmx-tools", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xnest", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xserver-common", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xserver-xephyr", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xserver-xfbdev", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xserver-xorg-core", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xserver-xorg-core-dbg", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xserver-xorg-core-udeb", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xserver-xorg-dev", reference:"2:1.12.4-6+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"xvfb", reference:"2:1.12.4-6+deb7u7")) 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");