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nessusThis script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.DEBIAN_DLA-654.NASL
HistoryOct 17, 2016 - 12:00 a.m.

Debian DLA-654-1 : libxfixes security update

2016-10-1700:00:00
This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
15

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.013

Percentile

85.8%

It was discovered that there was a integer overflow in libxfixes, a library providing a client interface to the X11 ‘XFIXES’ extension.

The 32 bit field ‘rep.length’ was not checked for validity, which allowed an integer overflow on 32 bit systems. A malicious server could send INT_MAX as ‘length’ which was then multiplied by the size of XRectangle. In this case the client would not read the whole data from server, getting out of sync.

For Debian 7 ‘Wheezy’, this issue has been fixed in libxfixes version 1:5.0-4+deb7u2.

We recommend that you upgrade your libxfixes 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.

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-654-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(94075);
  script_version("2.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2016-7944");

  script_name(english:"Debian DLA-654-1 : libxfixes 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:
"It was discovered that there was a integer overflow in libxfixes, a
library providing a client interface to the X11 'XFIXES' extension.

The 32 bit field 'rep.length' was not checked for validity, which
allowed an integer overflow on 32 bit systems. A malicious server
could send INT_MAX as 'length' which was then multiplied by the size
of XRectangle. In this case the client would not read the whole data
from server, getting out of sync.

For Debian 7 'Wheezy', this issue has been fixed in libxfixes version
1:5.0-4+deb7u2.

We recommend that you upgrade your libxfixes 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/2016/10/msg00010.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/libxfixes"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/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:libxfixes-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxfixes3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxfixes3-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxfixes3-udeb");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/10/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/17");
  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:"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:"libxfixes-dev", reference:"1:5.0-4+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"libxfixes3", reference:"1:5.0-4+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"libxfixes3-dbg", reference:"1:5.0-4+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"libxfixes3-udeb", reference:"1:5.0-4+deb7u2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
VendorProductVersionCPE
debiandebian_linuxlibxfixes-devp-cpe:/a:debian:debian_linux:libxfixes-dev
debiandebian_linuxlibxfixes3p-cpe:/a:debian:debian_linux:libxfixes3
debiandebian_linuxlibxfixes3-dbgp-cpe:/a:debian:debian_linux:libxfixes3-dbg
debiandebian_linuxlibxfixes3-udebp-cpe:/a:debian:debian_linux:libxfixes3-udeb
debiandebian_linux7.0cpe:/o:debian:debian_linux:7.0

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.013

Percentile

85.8%