Debian DLA-758-1 : libgd2 security update

2016-12-22T00:00:00
ID DEBIAN_DLA-758.NASL
Type nessus
Reporter Tenable
Modified 2018-07-10T00:00:00

Description

It was discovered that invalid color causes stack exhaustion by recursive call to function gdImageFillToBorder when the image used is truecolor.

The vulnerability can be exploited through php5 which uses system's libgd2 library through the imagefilltoborder() PHP function to cause denial of service (stack overflow) and possibly have unspecified other impact.

For Debian 7 'Wheezy', these problems have been fixed in version 2.0.36~rc1~dfsg-6.1+deb7u7.

We recommend that you upgrade your libgd2 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-758-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(96085);
  script_version("1.5");
  script_cvs_date("Date: 2018/07/10 12:45:04");

  script_cve_id("CVE-2016-9933");

  script_name(english:"Debian DLA-758-1 : libgd2 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 invalid color causes stack exhaustion by
recursive call to function gdImageFillToBorder when the image used is
truecolor.

The vulnerability can be exploited through php5 which uses system's
libgd2 library through the imagefilltoborder() PHP function to cause
denial of service (stack overflow) and possibly have unspecified other
impact.

For Debian 7 'Wheezy', these problems have been fixed in version
2.0.36~rc1~dfsg-6.1+deb7u7.

We recommend that you upgrade your libgd2 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/2016/12/msg00033.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/libgd2"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/I:N/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:libgd-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgd2-noxpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgd2-noxpm-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgd2-xpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgd2-xpm-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/22");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2018 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:"libgd-tools", reference:"2.0.36~rc1~dfsg-6.1+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"libgd2-noxpm", reference:"2.0.36~rc1~dfsg-6.1+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"libgd2-noxpm-dev", reference:"2.0.36~rc1~dfsg-6.1+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"libgd2-xpm", reference:"2.0.36~rc1~dfsg-6.1+deb7u7")) flag++;
if (deb_check(release:"7.0", prefix:"libgd2-xpm-dev", reference:"2.0.36~rc1~dfsg-6.1+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");