Vulnerabilities > CVE-2019-5747 - Out-of-bounds Read vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
NONE
Availability impact
NONE
network
low complexity
busybox
canonical
CWE-125
nessus

Summary

An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP client, server, and/or relay) might allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to assurance of a 4-byte length when decoding DHCP_SUBNET. NOTE: this issue exists because of an incomplete fix for CVE-2018-20679.

Vulnerable Configurations

Part Description Count
Application
Busybox
150
OS
Canonical
4

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Overread Buffers
    An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Nessus

NASL familyUbuntu Local Security Checks
NASL idUBUNTU_USN-3935-1.NASL
descriptionTyler Hicks discovered that BusyBox incorrectly handled symlinks inside tar archives. If a user or automated system were tricked into processing a specially crafted tar archive, a remote attacker could overwrite arbitrary files outside of the current directory. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2011-5325) Mathias Krause discovered that BusyBox incorrectly handled kernel module loading restrictions. A local attacker could possibly use this issue to bypass intended restrictions. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-9645) It was discovered that BusyBox incorrectly handled certain ZIP archives. If a user or automated system were tricked into processing a specially crafted ZIP archive, a remote attacker could cause BusyBox to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2015-9261) Nico Golde discovered that the BusyBox DHCP client incorrectly handled certain malformed domain names. A remote attacker could possibly use this issue to cause the DHCP client to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2147) Nico Golde discovered that the BusyBox DHCP client incorrectly handled certain 6RD options. A remote attacker could use this issue to cause the DHCP client to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2148) It was discovered that BusyBox incorrectly handled certain bzip2 archives. If a user or automated system were tricked into processing a specially crafted bzip2 archive, a remote attacker could cause BusyBox to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-15873) It was discovered that BusyBox incorrectly handled tab completion. A local attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-16544) It was discovered that the BusyBox wget utility incorrectly handled certain responses. A remote attacker could use this issue to cause BusyBox to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-1000517) It was discovered that the BusyBox DHCP utilities incorrectly handled certain memory operations. A remote attacker could possibly use this issue to access sensitive information. (CVE-2018-20679, CVE-2019-5747). 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 id123751
published2019-04-04
reporterUbuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/123751
titleUbuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : busybox vulnerabilities (USN-3935-1)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3935-1. 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(123751);
  script_version("1.3");
  script_cvs_date("Date: 2019/09/18 12:31:49");

  script_cve_id("CVE-2011-5325", "CVE-2014-9645", "CVE-2015-9261", "CVE-2016-2147", "CVE-2016-2148", "CVE-2017-15873", "CVE-2017-16544", "CVE-2018-1000517", "CVE-2018-20679", "CVE-2019-5747");
  script_xref(name:"USN", value:"3935-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : busybox vulnerabilities (USN-3935-1)");
  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:
"Tyler Hicks discovered that BusyBox incorrectly handled symlinks
inside tar archives. If a user or automated system were tricked into
processing a specially crafted tar archive, a remote attacker could
overwrite arbitrary files outside of the current directory. This issue
only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2011-5325)

Mathias Krause discovered that BusyBox incorrectly handled kernel
module loading restrictions. A local attacker could possibly use this
issue to bypass intended restrictions. This issue only affected Ubuntu
14.04 LTS. (CVE-2014-9645)

It was discovered that BusyBox incorrectly handled certain ZIP
archives. If a user or automated system were tricked into processing a
specially crafted ZIP archive, a remote attacker could cause BusyBox
to crash, leading to a denial of service. This issue only affected
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2015-9261)

Nico Golde discovered that the BusyBox DHCP client incorrectly handled
certain malformed domain names. A remote attacker could possibly use
this issue to cause the DHCP client to crash, leading to a denial of
service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04
LTS. (CVE-2016-2147)

Nico Golde discovered that the BusyBox DHCP client incorrectly handled
certain 6RD options. A remote attacker could use this issue to cause
the DHCP client to crash, leading to a denial of service, or possibly
execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and
Ubuntu 16.04 LTS. (CVE-2016-2148)

It was discovered that BusyBox incorrectly handled certain bzip2
archives. If a user or automated system were tricked into processing a
specially crafted bzip2 archive, a remote attacker could cause BusyBox
to crash, leading to a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu
16.04 LTS. (CVE-2017-15873)

It was discovered that BusyBox incorrectly handled tab completion. A
local attacker could possibly use this issue to execute arbitrary
code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(CVE-2017-16544)

It was discovered that the BusyBox wget utility incorrectly handled
certain responses. A remote attacker could use this issue to cause
BusyBox to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2018-1000517)

It was discovered that the BusyBox DHCP utilities incorrectly handled
certain memory operations. A remote attacker could possibly use this
issue to access sensitive information. (CVE-2018-20679, CVE-2019-5747).

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/3935-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update 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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox-initramfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:udhcpc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:udhcpd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
  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:18.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/04");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 2019 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:"^(14\.04|16\.04|18\.04|18\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 18.04 / 18.10", "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:"14.04", pkgname:"busybox", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"busybox-initramfs", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"busybox-static", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"udhcpc", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"udhcpd", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"busybox", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"busybox-initramfs", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"busybox-static", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"udhcpc", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"udhcpd", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"busybox", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"busybox-initramfs", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"busybox-static", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"udhcpc", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"udhcpd", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"busybox", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"busybox-initramfs", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"busybox-static", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"udhcpc", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"udhcpd", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "busybox / busybox-initramfs / busybox-static / udhcpc / udhcpd");
}

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/154361/SA-20190904-0.txt
idPACKETSTORM:154361
last seen2019-09-05
published2019-09-04
reporterT. Weber
sourcehttps://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
titleCisco Device Hardcoded Credentials / GNU glibc / BusyBox