Vulnerabilities > CVE-2019-15790 - Improper Privilege Management vulnerability in multiple products

047910
CVSS 3.3 - LOW
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
LOW
Integrity impact
NONE
Availability impact
NONE
local
low complexity
apport-project
canonical
CWE-269
nessus
NVD
Published: 2020-04-28
Updated: 2023-06-12

Summary

Apport reads and writes information on a crashed process to /proc/pid with elevated privileges. Apport then determines which user the crashed process belongs to by reading /proc/pid through get_pid_info() in data/apport. An unprivileged user could exploit this to read information about a privileged running process by exploiting PID recycling. This information could then be used to obtain ASLR offsets for a process with an existing memory corruption vulnerability. The initial fix introduced regressions in the Python Apport library due to a missing argument in Report.add_proc_environ in apport/report.py. It also caused an autopkgtest failure when reading /proc/pid and with Python 2 compatibility by reading /proc maps. The initial and subsequent regression fixes are in 2.20.11-0ubuntu16, 2.20.11-0ubuntu8.6, 2.20.9-0ubuntu7.12, 2.20.1-0ubuntu2.22 and 2.14.1-0ubuntu3.29+esm3.

Vulnerable Configurations

Part Description Count
Application
Apport_Project
1
OS
Canonical
5

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.

Nessus

  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-4171-1.NASL
    descriptionKevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. (CVE-2019-11481) Sander Bos discovered a race-condition in Apport during core dump creation. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11482) Sander Bos discovered Apport mishandled crash dumps originating from containers. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11483) Sander Bos discovered Apport mishandled lock-file creation. This could be used by a local attacker to cause a denial of service against Apport. (CVE-2019-11485) Kevin Backhouse discovered Apport read various process-specific files with elevated privileges during crash dump generation. This could could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-15790). 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 id130396
    published2019-10-30
    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/130396
    titleUbuntu 16.04 LTS / 18.04 LTS / 19.04 / 19.10 : apport vulnerabilities (USN-4171-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4171-1. 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(130396);
  script_version("1.4");
  script_cvs_date("Date: 2020/02/14");

  script_cve_id("CVE-2019-11481", "CVE-2019-11482", "CVE-2019-11483", "CVE-2019-11485", "CVE-2019-15790");
  script_xref(name:"USN", value:"4171-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 19.04 / 19.10 : apport vulnerabilities (USN-4171-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Kevin Backhouse discovered Apport would read its user-controlled
settings file as the root user. This could be used by a local attacker
to possibly crash Apport or have other unspecified consequences.
(CVE-2019-11481)

Sander Bos discovered a race-condition in Apport during core dump
creation. This could be used by a local attacker to generate a crash
report for a privileged process that is readable by an unprivileged
user. (CVE-2019-11482)

Sander Bos discovered Apport mishandled crash dumps originating from
containers. This could be used by a local attacker to generate a crash
report for a privileged process that is readable by an unprivileged
user. (CVE-2019-11483)

Sander Bos discovered Apport mishandled lock-file creation. This could
be used by a local attacker to cause a denial of service against
Apport. (CVE-2019-11485)

Kevin Backhouse discovered Apport read various process-specific files
with elevated privileges during crash dump generation. This could
could be used by a local attacker to generate a crash report for a
privileged process that is readable by an unprivileged user.
(CVE-2019-15790).

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/4171-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected apport, python-apport and / or python3-apport
packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/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:L/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:"cvss_score_source", value:"CVE-2019-11481");
  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:apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-apport");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  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:19.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/30");
  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:"^(16\.04|18\.04|19\.04|19\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 18.04 / 19.04 / 19.10", "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:"16.04", pkgname:"apport", pkgver:"2.20.1-0ubuntu2.20")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"python-apport", pkgver:"2.20.1-0ubuntu2.20")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"python3-apport", pkgver:"2.20.1-0ubuntu2.20")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"apport", pkgver:"2.20.9-0ubuntu7.8")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"python-apport", pkgver:"2.20.9-0ubuntu7.8")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"python3-apport", pkgver:"2.20.9-0ubuntu7.8")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"apport", pkgver:"2.20.10-0ubuntu27.2")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"python-apport", pkgver:"2.20.10-0ubuntu27.2")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"python3-apport", pkgver:"2.20.10-0ubuntu27.2")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"apport", pkgver:"2.20.11-0ubuntu8.1")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"python-apport", pkgver:"2.20.11-0ubuntu8.1")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"python3-apport", pkgver:"2.20.11-0ubuntu8.1")) 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, "apport / python-apport / python3-apport");
}
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-4171-3.NASL
    descriptionUSN-4171-1 fixed vulnerabilities in Apport. The update caused a regression in the Python Apport library. This update fixes the problem. We apologize for the inconvenience. Original advisory details : Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. (CVE-2019-11481) Sander Bos discovered a race-condition in Apport during core dump creation. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11482) Sander Bos discovered Apport mishandled crash dumps originating from containers. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11483) Sander Bos discovered Apport mishandled lock-file creation. This could be used by a local attacker to cause a denial of service against Apport. (CVE-2019-11485) Kevin Backhouse discovered Apport read various process-specific files with elevated privileges during crash dump generation. This could could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-15790). 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 id130586
    published2019-11-06
    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/130586
    titleUbuntu 16.04 LTS / 18.04 LTS / 19.04 / 19.10 : apport regression (USN-4171-3)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4171-3. 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(130586);
  script_version("1.4");
  script_cvs_date("Date: 2020/02/14");

  script_cve_id("CVE-2019-11481", "CVE-2019-11482", "CVE-2019-11483", "CVE-2019-11485", "CVE-2019-15790");
  script_xref(name:"USN", value:"4171-3");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 19.04 / 19.10 : apport regression (USN-4171-3)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"USN-4171-1 fixed vulnerabilities in Apport. The update caused a
regression in the Python Apport library. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory details :

Kevin Backhouse discovered Apport would read its user-controlled
settings file as the root user. This could be used by a local attacker
to possibly crash Apport or have other unspecified consequences.
(CVE-2019-11481)

Sander Bos discovered a race-condition in Apport during core
dump creation. This could be used by a local attacker to
generate a crash report for a privileged process that is
readable by an unprivileged user. (CVE-2019-11482)

Sander Bos discovered Apport mishandled crash dumps
originating from containers. This could be used by a local
attacker to generate a crash report for a privileged process
that is readable by an unprivileged user. (CVE-2019-11483)

Sander Bos discovered Apport mishandled lock-file creation.
This could be used by a local attacker to cause a denial of
service against Apport. (CVE-2019-11485)

Kevin Backhouse discovered Apport read various
process-specific files with elevated privileges during crash
dump generation. This could could be used by a local
attacker to generate a crash report for a privileged process
that is readable by an unprivileged user. (CVE-2019-15790).

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/4171-3/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected apport, python-apport and / or python3-apport
packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/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:L/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:"cvss_score_source", value:"CVE-2019-11481");
  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:apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-apport");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  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:19.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/11/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/06");
  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:"^(16\.04|18\.04|19\.04|19\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 18.04 / 19.04 / 19.10", "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:"16.04", pkgname:"apport", pkgver:"2.20.1-0ubuntu2.21")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"python-apport", pkgver:"2.20.1-0ubuntu2.21")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"python3-apport", pkgver:"2.20.1-0ubuntu2.21")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"apport", pkgver:"2.20.9-0ubuntu7.9")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"python-apport", pkgver:"2.20.9-0ubuntu7.9")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"python3-apport", pkgver:"2.20.9-0ubuntu7.9")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"apport", pkgver:"2.20.10-0ubuntu27.3")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"python-apport", pkgver:"2.20.10-0ubuntu27.3")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"python3-apport", pkgver:"2.20.10-0ubuntu27.3")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"apport", pkgver:"2.20.11-0ubuntu8.2")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"python-apport", pkgver:"2.20.11-0ubuntu8.2")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"python3-apport", pkgver:"2.20.11-0ubuntu8.2")) 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, "apport / python-apport / python3-apport");
}
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-4171-5.NASL
    descriptionUSN-4171-1 fixed vulnerabilities in Apport. This caused a regression in autopkgtest and python2 compatibility. This update fixes the problem. We apologize for the inconvenience. Original advisory details : Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. (CVE-2019-11481) Sander Bos discovered a race-condition in Apport during core dump creation. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11482) Sander Bos discovered Apport mishandled crash dumps originating from containers. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11483) Sander Bos discovered Apport mishandled lock-file creation. This could be used by a local attacker to cause a denial of service against Apport. (CVE-2019-11485) Kevin Backhouse discovered Apport read various process-specific files with elevated privileges during crash dump generation. This could could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-15790). 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 seen2020-03-21
    modified2020-03-18
    plugin id134657
    published2020-03-18
    reporterUbuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134657
    titleUbuntu 16.04 LTS / 18.04 LTS / 19.10 : apport regression (USN-4171-5)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4171-5. 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(134657);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/20");

  script_cve_id("CVE-2019-11481", "CVE-2019-11482", "CVE-2019-11483", "CVE-2019-11485", "CVE-2019-15790");
  script_xref(name:"USN", value:"4171-5");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 19.10 : apport regression (USN-4171-5)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"USN-4171-1 fixed vulnerabilities in Apport. This caused a regression
in autopkgtest and python2 compatibility. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory details :

Kevin Backhouse discovered Apport would read its user-controlled
settings file as the root user. This could be used by a local attacker
to possibly crash Apport or have other unspecified consequences.
(CVE-2019-11481)

Sander Bos discovered a race-condition in Apport during core
dump creation. This could be used by a local attacker to
generate a crash report for a privileged process that is
readable by an unprivileged user. (CVE-2019-11482)

Sander Bos discovered Apport mishandled crash dumps
originating from containers. This could be used by a local
attacker to generate a crash report for a privileged process
that is readable by an unprivileged user. (CVE-2019-11483)

Sander Bos discovered Apport mishandled lock-file creation.
This could be used by a local attacker to cause a denial of
service against Apport. (CVE-2019-11485)

Kevin Backhouse discovered Apport read various
process-specific files with elevated privileges during crash
dump generation. This could could be used by a local
attacker to generate a crash report for a privileged process
that is readable by an unprivileged user. (CVE-2019-15790).

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/4171-5/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected apport, python-apport and / or python3-apport
packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/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:L/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-apport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-apport");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  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:19.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 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:"^(16\.04|18\.04|19\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 18.04 / 19.10", "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:"16.04", pkgname:"apport", pkgver:"2.20.1-0ubuntu2.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"python-apport", pkgver:"2.20.1-0ubuntu2.22")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"python3-apport", pkgver:"2.20.1-0ubuntu2.22")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"apport", pkgver:"2.20.9-0ubuntu7.12")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"python-apport", pkgver:"2.20.9-0ubuntu7.12")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"python3-apport", pkgver:"2.20.9-0ubuntu7.12")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"apport", pkgver:"2.20.11-0ubuntu8.6")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"python-apport", pkgver:"2.20.11-0ubuntu8.6")) flag++;
if (ubuntu_check(osver:"19.10", pkgname:"python3-apport", pkgver:"2.20.11-0ubuntu8.6")) 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, "apport / python-apport / python3-apport");
}

References