Vulnerabilities > CVE-2016-4348 - Improper Input Validation vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
gnome
debian
opensuse
CWE-20
nessus
NVD
Published: 2016-05-20
Updated: 2018-10-30

Summary

The _rsvg_css_normalize_font_size function in librsvg 2.40.2 allows context-dependent attackers to cause a denial of service (stack consumption and application crash) via circular definitions in an SVG document.

Vulnerable Configurations

Part Description Count
Application
Gnome
100
OS
Debian
1
OS
Opensuse
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3584.NASL
    descriptionGustavo Grieco discovered several flaws in the way librsvg, a SAX-based renderer library for SVG files, parses SVG files with circular definitions. A remote attacker can take advantage of these flaws to cause an application using the librsvg library to crash.
    last seen2020-06-01
    modified2020-06-02
    plugin id91266
    published2016-05-20
    reporterThis script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/91266
    titleDebian DSA-3584-1 : librsvg - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-3584. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(91266);
  script_version("2.9");
  script_cvs_date("Date: 2018/11/10 11:49:37");

  script_cve_id("CVE-2015-7558", "CVE-2016-4348");
  script_xref(name:"DSA", value:"3584");

  script_name(english:"Debian DSA-3584-1 : librsvg - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Gustavo Grieco discovered several flaws in the way librsvg, a
SAX-based renderer library for SVG files, parses SVG files with
circular definitions. A remote attacker can take advantage of these
flaws to cause an application using the librsvg library to crash."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/librsvg"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2016/dsa-3584"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the librsvg packages.

For the stable distribution (jessie), these problems have been fixed
in version 2.40.5-1+deb8u2."
  );
  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:librsvg");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/05/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/20");
  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:"8.0", prefix:"gir1.2-rsvg-2.0", reference:"2.40.5-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"librsvg2-2", reference:"2.40.5-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"librsvg2-bin", reference:"2.40.5-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"librsvg2-common", reference:"2.40.5-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"librsvg2-dbg", reference:"2.40.5-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"librsvg2-dev", reference:"2.40.5-1+deb8u2")) flag++;
if (deb_check(release:"8.0", prefix:"librsvg2-doc", reference:"2.40.5-1+deb8u2")) 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");
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2016-608.NASL
    descriptionThis librsvg update to version 2.40.15 fixes the following issues : Security issues fixed : - CVE-2016-4348: DoS parsing SVGs with circular definitions _rsvg_css_normalize_font_size() function (boo#977986) Bugs fixed : - Actually scale the image if required, regression fix from upstream git (bgo#760262). - Fixed bgo#759084: Don
    last seen2020-06-05
    modified2016-05-20
    plugin id91278
    published2016-05-20
    reporterThis script is Copyright (C) 2016-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/91278
    titleopenSUSE Security Update : librsvg (openSUSE-2016-608)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2016-608.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(91278);
  script_version("2.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2016-4348");

  script_name(english:"openSUSE Security Update : librsvg (openSUSE-2016-608)");
  script_summary(english:"Check for the openSUSE-2016-608 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This librsvg update to version 2.40.15 fixes the following issues :

Security issues fixed :

  - CVE-2016-4348: DoS parsing SVGs with circular
    definitions _rsvg_css_normalize_font_size() function
    (boo#977986)

Bugs fixed :

  - Actually scale the image if required, regression fix
    from upstream git (bgo#760262).

  - Fixed bgo#759084: Don't crash when filters don't
    actually exist.

  - Updated our autogen.sh to use modern autotools.

  - Fixed bgo#761728: Memory leak in the
    PrimitiveComponentTransfer filter.

  - Added basic support for the 'baseline-shift' attribute
    in text objects (bgo#340047).

  - Fixed some duplicate logic when rendering paths
    (bgo#749415).

  - Rewrote the markers engine (bgo#685906, bgo#760180).

  - Refactoring of the test harness to use Glib's gtest
    infrastructure, instead of using home-grown machinery.
    Tests can simply be put as SVG files in the
    tests/subdirectories; it is not necessary to list them
    explicitly in some text file.

  - Gzipped SVGs now work if read from streams.

  - References to objects/filters/URIs/etc. are now handled
    lazily. Also, there is a general-purpose cycle detector
    so malformed SVGs don't cause infinite loops.

  - Removed parsing of Adobe blend modes; they were not
    implemented, anyway.

  - Add project files for building on Visual Studio
    (bgo#753555).

  - Added an '--export-id' option to rsvg-convert(1). This
    lets you select a single object to export, for example,
    to pick out a group from a multi-part drawing. Note that
    this is mostly useful for PNG output right now; for SVG
    output we don't preserve many attributes which could be
    useful in the extracted version. Doing this properly
    requires an internal 'output to SVG' backend instead of
    just telling Cairo to render to SVG."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=977986"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected librsvg packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdk-pixbuf-loader-rsvg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdk-pixbuf-loader-rsvg-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdk-pixbuf-loader-rsvg-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdk-pixbuf-loader-rsvg-debuginfo-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:librsvg-2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:librsvg-2-2-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:librsvg-2-2-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:librsvg-2-2-debuginfo-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:librsvg-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:librsvg-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:rsvg-view");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:rsvg-view-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:typelib-1_0-Rsvg-2_0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:13.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.1");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/20");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2020 Tenable Network Security, Inc.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE13\.2|SUSE42\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "13.2 / 42.1", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE13.2", reference:"gdk-pixbuf-loader-rsvg-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", reference:"gdk-pixbuf-loader-rsvg-debuginfo-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", reference:"librsvg-2-2-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", reference:"librsvg-2-2-debuginfo-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", reference:"librsvg-debugsource-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", reference:"librsvg-devel-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", reference:"rsvg-view-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", reference:"rsvg-view-debuginfo-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", reference:"typelib-1_0-Rsvg-2_0-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", cpu:"x86_64", reference:"gdk-pixbuf-loader-rsvg-32bit-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", cpu:"x86_64", reference:"gdk-pixbuf-loader-rsvg-debuginfo-32bit-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", cpu:"x86_64", reference:"librsvg-2-2-32bit-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE13.2", cpu:"x86_64", reference:"librsvg-2-2-debuginfo-32bit-2.40.15-10.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"gdk-pixbuf-loader-rsvg-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"gdk-pixbuf-loader-rsvg-debuginfo-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"librsvg-2-2-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"librsvg-2-2-debuginfo-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"librsvg-debugsource-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"librsvg-devel-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"rsvg-view-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"rsvg-view-debuginfo-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", reference:"typelib-1_0-Rsvg-2_0-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", cpu:"x86_64", reference:"gdk-pixbuf-loader-rsvg-32bit-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", cpu:"x86_64", reference:"gdk-pixbuf-loader-rsvg-debuginfo-32bit-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", cpu:"x86_64", reference:"librsvg-2-2-32bit-2.40.15-7.1") ) flag++;
if ( rpm_check(release:"SUSE42.1", cpu:"x86_64", reference:"librsvg-2-2-debuginfo-32bit-2.40.15-7.1") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gdk-pixbuf-loader-rsvg / gdk-pixbuf-loader-rsvg-32bit / etc");
}
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2017-1136.NASL
    descriptionAccording to the version of the librsvg2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - The _rsvg_css_normalize_font_size function in librsvg 2.40.2 allows context-dependent attackers to cause a denial of service (stack consumption and application crash) via circular definitions in an SVG document.(CVE-2016-4348) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-05-06
    modified2017-08-08
    plugin id102223
    published2017-08-08
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102223
    titleEulerOS 2.0 SP1 : librsvg2 (EulerOS-SA-2017-1136)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-477.NASL
    description(Note CVE-2016-4347 is a duplicate of CVE-2015-7558) Two DoS in librsvg 2.40.2 parsing SVGs with circular definitions were found (they will produce stack exhaustion) by Gustavo Grieco. The version in wheezy (2.36.1-2+deb7u1) is also vulnerable. For Debian 7
    last seen2020-03-17
    modified2016-05-18
    plugin id91197
    published2016-05-18
    reporterThis script is Copyright (C) 2016-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/91197
    titleDebian DLA-477-1 : librsvg security update
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2017-1137.NASL
    descriptionAccording to the version of the librsvg2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - The _rsvg_css_normalize_font_size function in librsvg 2.40.2 allows context-dependent attackers to cause a denial of service (stack consumption and application crash) via circular definitions in an SVG document.(CVE-2016-4348) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-05-06
    modified2017-08-08
    plugin id102224
    published2017-08-08
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102224
    titleEulerOS 2.0 SP2 : librsvg2 (EulerOS-SA-2017-1137)

References