Vulnerabilities > CVE-2019-11460 - Improper Input Validation vulnerability in Gnome Gnome-Desktop

047910
CVSS 9.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
high complexity
gnome
CWE-20
critical
nessus
NVD
Published: 2019-04-22
Updated: 2024-11-21

Summary

An issue was discovered in GNOME gnome-desktop 3.26, 3.28, and 3.30 prior to 3.30.2.2, and 3.32 prior to 3.32.1.1. A compromised thumbnailer may escape the bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI ioctl to push characters into the input buffer of the thumbnailer's controlling terminal, allowing an attacker to escape the sandbox if the thumbnailer has a controlling terminal. This is due to improper filtering of the TIOCSTI ioctl on 64-bit systems, similar to CVE-2019-10063.

Vulnerable Configurations

Part Description Count
Application
Gnome
8

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 familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3994-1.NASL
    descriptionIt was discovered that gnome-desktop incorrectly confined thumbnailers. If a user were tricked into downloading a malicious image file, a remote attacker could possibly combine this issue with another vulnerability to escape the sandbox and execute arbitrary code. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id125476
    published2019-05-28
    reporterUbuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125476
    titleUbuntu 18.04 LTS / 18.10 / 19.04 : gnome-desktop3 vulnerability (USN-3994-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3994-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(125476);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/15");

  script_cve_id("CVE-2019-11460");
  script_xref(name:"USN", value:"3994-1");

  script_name(english:"Ubuntu 18.04 LTS / 18.10 / 19.04 : gnome-desktop3 vulnerability (USN-3994-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that gnome-desktop incorrectly confined
thumbnailers. If a user were tricked into downloading a malicious
image file, a remote attacker could possibly combine this issue with
another vulnerability to escape the sandbox and execute arbitrary
code.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu 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://usn.ubuntu.com/3994-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libgnome-desktop-3-17 package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:H/PR:N/UI:N/S:C/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgnome-desktop-3-17");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/28");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(18\.04|18\.10|19\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 18.04 / 18.10 / 19.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"18.04", pkgname:"libgnome-desktop-3-17", pkgver:"3.28.2-0ubuntu1.3")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libgnome-desktop-3-17", pkgver:"3.30.1-1ubuntu1.1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libgnome-desktop-3-17", pkgver:"3.32.1-1ubuntu1.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libgnome-desktop-3-17");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-2185-1.NASL
    descriptionThis update for flatpak fixes the following issues : Security issues fixed : CVE-2019-8308: Fixed a potential sandbox escape via /proc (bsc#1125431). CVE-2019-11460: Fixed a compromised thumbnailer may escape the bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI ioctl (bsc#1133043). CVE-2019-11461: Fixed a compromised thumbnailer may escape the bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI ioctl (bsc#1133041). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id128048
    published2019-08-21
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/128048
    titleSUSE SLED15 / SLES15 Security Update : flatpak (SUSE-SU-2019:2185-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:2185-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(128048);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/02");

  script_cve_id("CVE-2019-11460", "CVE-2019-11461", "CVE-2019-8308");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : flatpak (SUSE-SU-2019:2185-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for flatpak fixes the following issues :

Security issues fixed :

CVE-2019-8308: Fixed a potential sandbox escape via /proc
(bsc#1125431).

CVE-2019-11460: Fixed a compromised thumbnailer may escape the
bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI
ioctl (bsc#1133043).

CVE-2019-11461: Fixed a compromised thumbnailer may escape the
bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI
ioctl (bsc#1133041).

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE 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://bugzilla.suse.com/show_bug.cgi?id=1125431"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1133041"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1133043"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-11460/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-11461/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-8308/"
  );
  # https://www.suse.com/support/update/announcement/2019/suse-su-20192185-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?49481505"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Desktop Applications 15:zypper in -t
patch SUSE-SLE-Module-Desktop-Applications-15-2019-2185=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:H/PR:N/UI:N/S:C/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:flatpak");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:flatpak-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:flatpak-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:flatpak-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libflatpak0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libflatpak0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:typelib-1_0-Flatpak");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/02/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/21");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

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

  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, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP0", os_ver + " SP" + sp);
if (os_ver == "SLED15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP0", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES15", sp:"0", reference:"flatpak-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"flatpak-debuginfo-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"flatpak-debugsource-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"flatpak-devel-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libflatpak0-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libflatpak0-debuginfo-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"typelib-1_0-Flatpak-1_0-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"flatpak-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"flatpak-debuginfo-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"flatpak-debugsource-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"flatpak-devel-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libflatpak0-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libflatpak0-debuginfo-0.10.4-4.10.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"typelib-1_0-Flatpak-1_0-0.10.4-4.10.1")) 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, "flatpak");
}
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201908-28.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201908-28 (GNOME desktop library: Security bypass) A vulnerability was discovered in the GNOME desktop library which allows an attacker to escape the sandbox. Impact : A local attacker could possibly bypass sandbox protection. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id128443
    published2019-09-03
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/128443
    titleGLSA-201908-28 : GNOME desktop library: Security bypass
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-2038.NASL
    descriptionThis update for flatpak fixes the following issues : Security issues fixed : - CVE-2019-8308: Fixed a potential sandbox escape via /proc (bsc#1125431). - CVE-2019-11460: Fixed a compromised thumbnailer may escape the bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI ioctl (bsc#1133043). - CVE-2019-11461: Fixed a compromised thumbnailer may escape the bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI ioctl (bsc#1133041). This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-01
    modified2020-06-02
    plugin id128454
    published2019-09-03
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/128454
    titleopenSUSE Security Update : flatpak (openSUSE-2019-2038)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-992622684B.NASL
    descriptiongnome-desktop 3.30.2.3 release, fixing thumbnailer sandbox escape, CVE-2019-11460 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id125300
    published2019-05-21
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125300
    titleFedora 29 : gnome-desktop3 (2019-992622684b)

References