Vulnerabilities > CVE-2017-7478 - Improper Input Validation vulnerability in Openvpn

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
openvpn
CWE-20
nessus
exploit available
NVD
Published: 2017-05-15
Updated: 2017-08-16

Summary

OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.

Vulnerable Configurations

Part Description Count
Application
Openvpn
10

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.

Exploit-Db

descriptionOpenVPN 2.4.0 - Unauthenticated Denial of Service. CVE-2017-7478. Dos exploit for Multiple platform. Tags: Denial of Service (DoS)
fileexploits/multiple/dos/41993.py
idEDB-ID:41993
last seen2017-05-11
modified2017-05-11
platformmultiple
port1194
published2017-05-11
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/41993/
titleOpenVPN 2.4.0 - Unauthenticated Denial of Service
typedos

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-F426ACF49D.NASL
    descriptionSecurity fix for two remote DoS issues (CVE-2017-7478, CVE-2017-7479) 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
    modified2017-05-24
    plugin id100363
    published2017-05-24
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100363
    titleFedora 24 : openvpn (2017-f426acf49d)
    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-f426acf49d.
#

include("compat.inc");

if (description)
{
  script_id(100363);
  script_version("3.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-7478", "CVE-2017-7479");
  script_xref(name:"FEDORA", value:"2017-f426acf49d");

  script_name(english:"Fedora 24 : openvpn (2017-f426acf49d)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Security fix for two remote DoS issues (CVE-2017-7478, CVE-2017-7479)

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-f426acf49d"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected openvpn package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E: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:fedoraproject:fedora:openvpn");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:24");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/24");
  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:"^24([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 24", "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:"FC24", reference:"openvpn-2.3.16-1.fc24")) 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, "openvpn");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-89D98779EC.NASL
    descriptionThis update brings in the latest OpenVPN v2.4.2 release. This release contains fixes for two authenticated remote DoS vulnerabilities (CVE-2017-7478 and CVE-2017-7479). For more information see the upstream [security announcement](http://community.openvpn.net/openvpn/wiki/QuarkslabAndCr yptographyEngineerAudits). This build also switches back to OpenSSL 1.0, using compat-openssl10 and compat-openssl10-pkcs11-helper. This is temporarily until full OpenSSL 1.1 support have arrived OpenVPN. This should also resolve a lot of issues with features missing or not working properly with mbed TLS. 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
    modified2017-07-17
    plugin id101679
    published2017-07-17
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/101679
    titleFedora 26 : openvpn (2017-89d98779ec)
    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-2017-89d98779ec.
#

include("compat.inc");

if (description)
{
  script_id(101679);
  script_version("3.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-7478", "CVE-2017-7479");
  script_xref(name:"FEDORA", value:"2017-89d98779ec");

  script_name(english:"Fedora 26 : openvpn (2017-89d98779ec)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update brings in the latest OpenVPN v2.4.2 release. This release
contains fixes for two authenticated remote DoS vulnerabilities
(CVE-2017-7478 and CVE-2017-7479). For more information see the
upstream [security
announcement](http://community.openvpn.net/openvpn/wiki/QuarkslabAndCr
yptographyEngineerAudits).

This build also switches back to OpenSSL 1.0, using compat-openssl10
and compat-openssl10-pkcs11-helper. This is temporarily until full
OpenSSL 1.1 support have arrived OpenVPN. This should also resolve a
lot of issues with features missing or not working properly with mbed
TLS.

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-2017-89d98779ec"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected openvpn package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E: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:fedoraproject:fedora:openvpn");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:26");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/17");
  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:"^26([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 26", "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:"FC26", reference:"openvpn-2.4.2-1.fc26")) 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, "openvpn");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-1622-1.NASL
    descriptionThis update for openvpn fixes the following issues : - CVE-2016-6329: Show which ciphers should no longer be used in openvpn --show-ciphers (bsc#995374) - CVE-2017-7478: openvpn: Authenticated user can DoS server by using a big payload in P_CONTROL (bsc#1038709) - CVE-2017-7479: openvpn: Denial of Service due to Exhaustion of Packet-ID counter (bsc#1038711) - Hardening measures found by internal audit (bsc#1038713) 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 id100951
    published2017-06-21
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100951
    titleSUSE SLED12 / SLES12 Security Update : openvpn (SUSE-SU-2017:1622-1) (SWEET32)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2017:1622-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(100951);
  script_version("3.9");
  script_cvs_date("Date: 2019/09/11 11:22:15");

  script_cve_id("CVE-2016-6329", "CVE-2017-7478", "CVE-2017-7479");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : openvpn (SUSE-SU-2017:1622-1) (SWEET32)");
  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 openvpn fixes the following issues :

  - CVE-2016-6329: Show which ciphers should no longer be
    used in openvpn

    --show-ciphers (bsc#995374)

  - CVE-2017-7478: openvpn: Authenticated user can DoS
    server by using a big payload in P_CONTROL (bsc#1038709)

  - CVE-2017-7479: openvpn: Denial of Service due to
    Exhaustion of Packet-ID counter (bsc#1038711)

  - Hardening measures found by internal audit (bsc#1038713)

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=1038709"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1038711"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1038713"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=995374"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-6329/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-7478/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-7479/"
  );
  # https://www.suse.com/support/update/announcement/2017/suse-su-20171622-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?14b29af3"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server for Raspberry Pi 12-SP2:zypper in -t
patch SUSE-SLE-RPI-12-SP2-2017-998=1

SUSE Linux Enterprise Server 12-SP2:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-2017-998=1

SUSE Linux Enterprise Desktop 12-SP2:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP2-2017-998=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E: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:novell:suse_linux:openvpn");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openvpn-auth-pam-plugin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openvpn-auth-pam-plugin-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openvpn-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openvpn-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/01/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/21");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 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:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "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);
if (cpu >!< "x86_64") audit(AUDIT_ARCH_NOT, "x86_64", cpu);


sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP2", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openvpn-2.3.8-16.14.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openvpn-auth-pam-plugin-2.3.8-16.14.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openvpn-auth-pam-plugin-debuginfo-2.3.8-16.14.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openvpn-debuginfo-2.3.8-16.14.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openvpn-debugsource-2.3.8-16.14.1")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openvpn-2.3.8-16.14.1")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openvpn-debuginfo-2.3.8-16.14.1")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openvpn-debugsource-2.3.8-16.14.1")) 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, "openvpn");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2838-1.NASL
    descriptionThis update for openvpn fixes the following security issues : - CVE-2017-12166: OpenVPN was vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting in code execution. (bsc#1060877). - CVE-2016-6329: Now show which ciphers should no longer be used in openvpn --show-ciphers to avoid the SWEET32 attack (bsc#995374) - CVE-2017-7478: OpenVPN was vulnerable to unauthenticated Denial of Service of server via received large control packet. (bsc#1038709) - CVE-2017-7479: OpenVPN was vulnerable to reachable assertion when packet-ID counter rolls over resulting into Denial of Service of server by authenticated attacker. (bsc#1038711) - Some other hardening fixes have also been applied (bsc#1038713) 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 id104141
    published2017-10-25
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104141
    titleSUSE SLES11 Security Update : openvpn (SUSE-SU-2017:2838-1) (SWEET32)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3284-1.NASL
    descriptionIt was discovered that OpenVPN improperly triggered an assert when receiving an oversized control packet in some situations. A remote attacker could use this to cause a denial of service (server or client crash). (CVE-2017-7478) It was discovered that OpenVPN improperly triggered an assert when packet ids rolled over. An authenticated remote attacker could use this to cause a denial of service (application crash). (CVE-2017-7479). 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 id100155
    published2017-05-12
    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/100155
    titleUbuntu 17.04 : openvpn vulnerabilities (USN-3284-1)
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_04CC7BD2368611E7AA64080027EF73EC.NASL
    descriptionSamuli Seppanen reports : OpenVPN v2.4.0 was audited for security vulnerabilities independently by Quarkslabs (funded by OSTIF) and Cryptography Engineering (funded by Private Internet Access) between December 2016 and April 2017. The primary findings were two remote denial-of-service vulnerabilities. Fixes to them have been backported to v2.3.15. An authenticated client can do the
    last seen2020-06-01
    modified2020-06-02
    plugin id100140
    published2017-05-12
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100140
    titleFreeBSD : OpenVPN -- two remote denial-of-service vulnerabilities (04cc7bd2-3686-11e7-aa64-080027ef73ec)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-0D0F18140A.NASL
    descriptionThis update brings in the latest OpenVPN v2.4.2 release. This release contains fixes for two authenticated remote DoS vulnerabilities (CVE-2017-7478 and CVE-2017-7479). For more information see the upstream [security announcement](http://community.openvpn.net/openvpn/wiki/QuarkslabAndCr yptographyEngineerAudits). 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
    modified2017-05-16
    plugin id100183
    published2017-05-16
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100183
    titleFedora 25 : openvpn (2017-0d0f18140a)
  • NASL familyWindows
    NASL idOPENVPN_2_4_2_CVE_2017_7478.NASL
    descriptionAccording to its self-reported version number, the version of OpenVPN installed on the remote Windows host is 2.3.12 prior to 2.3.15 or 2.4.x prior to 2.4.2. It is, therefore, affected by a denial of service (DoS) vulnerability due to invalid packet processing logic. An unauthenticated, remote attacker can exploit this issue, by sending a large control packet, to cause the application to stop responding.
    last seen2020-06-01
    modified2020-06-02
    plugin id125259
    published2019-05-17
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125259
    titleOpenVPN 2.3.12 < 2.3.15 / 2.4.x < 2.4.2 Denial of Service Vulnerability (Windows)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-717.NASL
    descriptionThis update for openvpn fixes the following issues : - CVE-2016-6329: Show which ciphers should no longer be used in openvpn --show-ciphers (bsc#995374) - CVE-2017-7478: openvpn: Authenticated user can DoS server by using a big payload in P_CONTROL (bsc#1038709) - CVE-2017-7479: openvpn: Denial of Service due to Exhaustion of Packet-ID counter (bsc#1038711) - Hardening measures found by internal audit (bsc#1038713) This update was imported from the SUSE:SLE-12:Update update project.
    last seen2020-06-05
    modified2017-06-30
    plugin id101128
    published2017-06-30
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/101128
    titleopenSUSE Security Update : openvpn (openSUSE-2017-717) (SWEET32)

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/142489/openvpn240-dos.txt
idPACKETSTORM:142489
last seen2017-05-13
published2017-05-12
reporterQuarksLab
sourcehttps://packetstormsecurity.com/files/142489/OpenVPN-2.4.0-Denial-Of-Service.html
titleOpenVPN 2.4.0 Denial Of Service

References