Vulnerabilities > CVE-2017-2837 - Integer Overflow or Wraparound vulnerability in multiple products

047910
CVSS 5.9 - MEDIUM
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
high complexity
freerdp
debian
CWE-190
nessus
NVD
Published: 2018-04-24
Updated: 2024-11-21

Summary

An exploitable denial of service vulnerability exists within the handling of security data in FreeRDP 2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a denial of service condition. An attacker can compromise the server or use man in the middle to trigger this vulnerability.

Vulnerable Configurations

Part Description Count
Application
Freerdp
1
OS
Debian
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Forced Integer Overflow
    This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-ED31E1F941.NASL
    descriptionUpdate to latest snapshot that contains fixes for the latest Talos discovered CVEs. 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 seen2020-06-05
    modified2017-08-09
    plugin id102277
    published2017-08-09
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102277
    titleFedora 25 : 2:freerdp / remmina (2017-ed31e1f941)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2017-ed31e1f941.
#

include("compat.inc");

if (description)
{
  script_id(102277);
  script_version("3.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-2834", "CVE-2017-2835", "CVE-2017-2836", "CVE-2017-2837", "CVE-2017-2838", "CVE-2017-2839");
  script_xref(name:"FEDORA", value:"2017-ed31e1f941");

  script_name(english:"Fedora 25 : 2:freerdp / remmina (2017-ed31e1f941)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Update to latest snapshot that contains fixes for the latest Talos
discovered CVEs.

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."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bodhi.fedoraproject.org/updates/FEDORA-2017-ed31e1f941"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected 2:freerdp and / or remmina packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:2:freerdp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:remmina");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:25");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/04/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/09");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/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/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^25([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 25", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) 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, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC25", reference:"freerdp-2.0.0-31.20170724gitf8c9f43.fc25", epoch:"2")) flag++;
if (rpm_check(release:"FC25", reference:"remmina-1.2.0-0.39.20170724git0387ee0.fc25")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "2:freerdp / remmina");
}
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3380-1.NASL
    descriptionIt was discovered that FreeRDP incorrectly handled certain width and height values. A malicious server could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS. (CVE-2014-0250) It was discovered that FreeRDP incorrectly handled certain values in a Scope List. A malicious server could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2014-0791) Tyler Bohan discovered that FreeRDP incorrectly handled certain length values. A malicious server could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-2834, CVE-2017-2835) Tyler Bohan discovered that FreeRDP incorrectly handled certain packets. A malicious server could possibly use this issue to cause FreeRDP to crash, resulting in a denial of service. (CVE-2017-2836, CVE-2017-2837, CVE-2017-2838, CVE-2017-2839). 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 id102260
    published2017-08-08
    reporterUbuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102260
    titleUbuntu 14.04 LTS / 16.04 LTS / 17.04 : freerdp vulnerabilities (USN-3380-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3380-1. 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(102260);
  script_version("1.6");
  script_cvs_date("Date: 2019/09/18 12:31:47");

  script_cve_id("CVE-2014-0250", "CVE-2014-0791", "CVE-2017-2834", "CVE-2017-2835", "CVE-2017-2836", "CVE-2017-2837", "CVE-2017-2838", "CVE-2017-2839");
  script_xref(name:"USN", value:"3380-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : freerdp vulnerabilities (USN-3380-1)");
  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:
"It was discovered that FreeRDP incorrectly handled certain width and
height values. A malicious server could use this issue to cause
FreeRDP to crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS.
(CVE-2014-0250)

It was discovered that FreeRDP incorrectly handled certain values in a
Scope List. A malicious server could use this issue to cause FreeRDP
to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2014-0791)

Tyler Bohan discovered that FreeRDP incorrectly handled certain length
values. A malicious server could use this issue to cause FreeRDP to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2017-2834, CVE-2017-2835)

Tyler Bohan discovered that FreeRDP incorrectly handled certain
packets. A malicious server could possibly use this issue to cause
FreeRDP to crash, resulting in a denial of service. (CVE-2017-2836,
CVE-2017-2837, CVE-2017-2838, CVE-2017-2839).

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/3380-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected libfreerdp-client1.1 and / or libfreerdp1
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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/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:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-client1.1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp1");
  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:17.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/01/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/08");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 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|17\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 17.04", "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:"14.04", pkgname:"libfreerdp1", pkgver:"1.0.2-2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"libfreerdp-client1.1", pkgver:"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2")) flag++;
if (ubuntu_check(osver:"17.04", pkgname:"libfreerdp-client1.1", pkgver:"1.1.0~git20140921.1.440916e+dfsg1-10ubuntu1.1")) 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, "libfreerdp-client1.1 / libfreerdp1");
}
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-992.NASL
    descriptionThis update for freerdp fixes the following issues : - CVE-2017-2834: Out-of-bounds write in license_recv() (bsc#1050714) - CVE-2017-2835: Out-of-bounds write in rdp_recv_tpkt_pdu (bsc#1050712) - CVE-2017-2836: Rdp Client Read Server Proprietary Certificate Denial of Service (bsc#1050699) - CVE-2017-2837: Client GCC Read Server Security Data DoS (bsc#1050704) - CVE-2017-2838: Client License Read Product Info Denial of Service Vulnerability (bsc#1050708) - CVE-2017-2839: Client License Read Challenge Packet Denial of Service (bsc#1050711) This update was imported from the SUSE:SLE-12-SP2:Update update project.
    last seen2020-06-05
    modified2017-09-05
    plugin id102945
    published2017-09-05
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102945
    titleopenSUSE Security Update : freerdp (openSUSE-2017-992)
    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-2017-992.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(102945);
  script_version("3.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-2834", "CVE-2017-2835", "CVE-2017-2836", "CVE-2017-2837", "CVE-2017-2838", "CVE-2017-2839");

  script_name(english:"openSUSE Security Update : freerdp (openSUSE-2017-992)");
  script_summary(english:"Check for the openSUSE-2017-992 patch");

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

  - CVE-2017-2834: Out-of-bounds write in license_recv()
    (bsc#1050714)

  - CVE-2017-2835: Out-of-bounds write in rdp_recv_tpkt_pdu
    (bsc#1050712)

  - CVE-2017-2836: Rdp Client Read Server Proprietary
    Certificate Denial of Service (bsc#1050699)

  - CVE-2017-2837: Client GCC Read Server Security Data DoS
    (bsc#1050704)

  - CVE-2017-2838: Client License Read Product Info Denial
    of Service Vulnerability (bsc#1050708)

  - CVE-2017-2839: Client License Read Challenge Packet
    Denial of Service (bsc#1050711)

This update was imported from the SUSE:SLE-12-SP2:Update update
project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1050699"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1050704"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1050708"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1050711"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1050712"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1050714"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected freerdp packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:freerdp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:freerdp-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:freerdp-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:freerdp-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libfreerdp2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libfreerdp2-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.3");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/05");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 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/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 !~ "^(SUSE42\.2|SUSE42\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "42.2 / 42.3", 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:"SUSE42.2", reference:"freerdp-2.0.0~git.1463131968.4e66df7-3.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"freerdp-debuginfo-2.0.0~git.1463131968.4e66df7-3.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"freerdp-debugsource-2.0.0~git.1463131968.4e66df7-3.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"freerdp-devel-2.0.0~git.1463131968.4e66df7-3.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"libfreerdp2-2.0.0~git.1463131968.4e66df7-3.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.2", reference:"libfreerdp2-debuginfo-2.0.0~git.1463131968.4e66df7-3.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"freerdp-2.0.0~git.1463131968.4e66df7-6.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"freerdp-debuginfo-2.0.0~git.1463131968.4e66df7-6.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"freerdp-debugsource-2.0.0~git.1463131968.4e66df7-6.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"freerdp-devel-2.0.0~git.1463131968.4e66df7-6.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"libfreerdp2-2.0.0~git.1463131968.4e66df7-6.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"libfreerdp2-debuginfo-2.0.0~git.1463131968.4e66df7-6.1") ) 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, "freerdp / freerdp-debuginfo / freerdp-debugsource / freerdp-devel / etc");
}
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-2580.NASL
    descriptionAccording to the versions of the freerdp packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An exploitable code execution vulnerability exists in the RDP receive functionality of FreeRDP 2.0.0-beta1+android11. A specially crafted server response can cause an out-of-bounds write resulting in an exploitable condition. An attacker can compromise the server or use a man in the middle to trigger this vulnerability.(CVE-2017-2835) - An exploitable denial of service vulnerability exists within the handling of challenge packets in FreeRDP 2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a denial of service condition. An attacker can compromise the server or use man in the middle to trigger this vulnerability.(CVE-2017-2838) - An exploitable denial of service vulnerability exists within the handling of challenge packets in FreeRDP 2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a denial of service condition. An attacker can compromise the server or use man in the middle to trigger this vulnerability.(CVE-2017-2839) - An exploitable denial of service vulnerability exists within the handling of security data in FreeRDP 2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a denial of service condition. An attacker can compromise the server or use man in the middle to trigger this vulnerability.(CVE-2017-2837) - An exploitable denial of service vulnerability exists within the reading of proprietary server certificates in FreeRDP 2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a denial of service condition. An attacker can compromise the server or use man in the middle to trigger this vulnerability.(CVE-2017-2836) - FreeRDP FreeRDP 2.0.0-rc3 released version before commit 205c612820dac644d665b5bb1cdf437dc5ca01e3 contains a Other/Unknown vulnerability in channels/drdynvc/client/drdynvc_main.c, drdynvc_process_capability_request that can result in The RDP server can read the client
    last seen2020-05-08
    modified2019-12-19
    plugin id132297
    published2019-12-19
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/132297
    titleEulerOS 2.0 SP3 : freerdp (EulerOS-SA-2019-2580)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2234-1.NASL
    descriptionThis update for freerdp fixes the following issues : - CVE-2017-2834: Out-of-bounds write in license_recv() (bsc#1050714) - CVE-2017-2835: Out-of-bounds write in rdp_recv_tpkt_pdu (bsc#1050712) - CVE-2017-2836: Rdp Client Read Server Proprietary Certificate Denial of Service (bsc#1050699) - CVE-2017-2837: Client GCC Read Server Security Data DoS (bsc#1050704) - CVE-2017-2838: Client License Read Product Info Denial of Service Vulnerability (bsc#1050708) - CVE-2017-2839: Client License Read Challenge Packet Denial of Service (bsc#1050711) 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 id102693
    published2017-08-23
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102693
    titleSUSE SLED12 Security Update : freerdp (SUSE-SU-2017:2234-1)
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-2455.NASL
    descriptionAccording to the versions of the freerdp packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - FreeRDP before 1.1.0-beta+2013071101 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) by disconnecting before authentication has finished.(CVE-2013-4119) - FreeRDP FreeRDP 2.0.0-rc3 released version before commit 205c612820dac644d665b5bb1cdf437dc5ca01e3 contains a Other/Unknown vulnerability in channels/drdynvc/client/drdynvc_main.c, drdynvc_process_capability_request that can result in The RDP server can read the client
    last seen2020-05-08
    modified2019-12-04
    plugin id131609
    published2019-12-04
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/131609
    titleEulerOS 2.0 SP2 : freerdp (EulerOS-SA-2019-2455)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-4BC09C2364.NASL
    descriptionUpdate to latest snapshot that contains fixes for the latest Talos discovered CVEs. 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 seen2020-06-05
    modified2017-08-01
    plugin id102088
    published2017-08-01
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102088
    titleFedora 26 : 2:freerdp / remmina (2017-4bc09c2364)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1095.NASL
    descriptionTyler Bohan of Talos discovered that FreeRDP, a free implementation of the Remote Desktop Protocol (RDP), contained several vulnerabilities that allowed a malicious remote server or a man-in-the-middle to either cause a DoS by forcibly terminating the client, or execute arbitrary code on the client side. For Debian 7
    last seen2020-03-17
    modified2017-09-11
    plugin id103095
    published2017-09-11
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103095
    titleDebian DLA-1095-1 : freerdp security update
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3923.NASL
    descriptionTyler Bohan of Talos discovered that FreeRDP, a free implementation of the Remote Desktop Protocol (RDP), contained several vulnerabilities that allowed a malicious remote server or a man-in-the-middle to either cause a DoS by forcibly terminating the client, or execute arbitrary code on the client side.
    last seen2020-06-01
    modified2020-06-02
    plugin id102097
    published2017-08-02
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102097
    titleDebian DSA-3923-1 : freerdp - security update

Seebug

bulletinFamilyexploit
description### Summary An exploitable denial of service vulnerability exists within the handling of security data in FreeRDP 2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a denial of service condition. An attacker can compromise the server or use man in the middle to trigger this vulnerability. ### Tested Versions FreeRDP 2.0.0-beta1+android11 - Windows, OSX, Linux ### Product URLs http://www.freerdp.com/ ### CVSSv3 Score 6.5 - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H ### CWE CWE-190: Integer Overflow or Wraparound ### Details FreeRDP is a remote desktop protocol implementation available for all of the major operating systems. Many of the commercial remote desktop protocol applications actually use this library as their core. The vulnerability arises in the gcc_read_server_security_data function. ``` BOOL gcc_read_server_security_data(wStream* s, rdpMcs* mcs) { ... Stream_Read_UINT32(s, settings->ServerRandomLength); /* serverRandomLen */ Stream_Read_UINT32(s, settings->ServerCertificateLength); /* serverCertLen */ [1] if (Stream_GetRemainingLength(s) < settings->ServerRandomLength + settings->ServerCertificateLength) [2] return FALSE; if ((settings->ServerRandomLength <= 0) || (settings->ServerCertificateLength <= 0)) return FALSE; /* serverRandom */ settings->ServerRandom = (BYTE*) malloc(settings->ServerRandomLength); if (!settings->ServerRandom) return FALSE; Stream_Read(s, settings->ServerRandom, settings->ServerRandomLength); [3] /* serverCertificate */ settings->ServerCertificate = (BYTE*) malloc(settings->ServerCertificateLength); if (!settings->ServerCertificate) return FALSE; Stream_Read(s, settings->ServerCertificate, settings->ServerCertificateLength); certificate_free(settings->RdpServerCertificate); ``` The read_server_security_data function reads in two length values from the packet, [1]. It then does an obscure check to ensure that it is not going over the value of the remaining length. With both of these values being taken from the packet it is simple to overflow this check and continue on with a larger length than what is available. When the overly large length data is attempted to be read from the buffer an out-of-bounds read occurs and an exploitable denail of service condition arises. ### Crash Information ``` Crashed thread log = : Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x00007fff955c6f72 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff955c63b3 mach_msg + 55 2 com.apple.CoreFoundation 0x00007fff88e001c4 __CFRunLoopServiceMachPort + 212 3 com.apple.CoreFoundation 0x00007fff88dff68c __CFRunLoopRun + 1356 4 com.apple.CoreFoundation 0x00007fff88dfeed8 CFRunLoopRunSpecific + 296 5 com.apple.HIToolbox 0x00007fff8f2b7935 RunCurrentEventLoopInMode + 235 6 com.apple.HIToolbox 0x00007fff8f2b776f ReceiveNextEventCommon + 432 7 com.apple.HIToolbox 0x00007fff8f2b75af _BlockUntilNextEventMatchingListInModeWithFilter + 71 8 com.apple.AppKit 0x00007fff8fe9adf6 _DPSNextEvent + 1067 9 com.apple.AppKit 0x00007fff8fe9a226 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454 10 com.apple.AppKit 0x00007fff8fe8ed80 -[NSApplication run] + 682 11 com.apple.AppKit 0x00007fff8fe58368 NSApplicationMain + 1176 12 libdyld.dylib 0x00007fff86cf45ad start + 1 log name is: ./crashlogs/1.crashlog.txt --- exception=EXC_CRASH:signal=11:is_exploitable= no:instruction_disassembly=ret:instruction_address=0x00007fff955c6f72:access_type=:access_address=0x0000000000000000 ``` ### Exploit Proof-of-Concept Run included Python server and connect FreeRDP Client to it. ### Timeline * 2017-05-24 - Vendor Disclosure * 2017-07-24 - Public Release ### CREDIT * Discovered by Tyler Bohan of Cisco Talos.
idSSV:96459
last seen2017-11-19
modified2017-09-13
published2017-09-13
reporterRoot
titleFreeRDP Rdp Client GCC Read Server Security Data Denial of Service Vulnerability(CVE-2017-2837)

Talos

idTALOS-2017-0339
last seen2019-05-29
published2017-07-24
reporterTalos Intelligence
sourcehttp://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0339
titleFreeRDP Rdp Client GCC Read Server Security Data Denial of Service Vulnerability

References