Vulnerabilities > CVE-2016-6515 - Improper Input Validation vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2017:2029. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(102112);
  script_version("3.11");
  script_cvs_date("Date: 2019/10/24 15:35:43");

  script_cve_id("CVE-2016-10009", "CVE-2016-10011", "CVE-2016-10012", "CVE-2016-10708", "CVE-2016-6210", "CVE-2016-6515");
  script_xref(name:"RHSA", value:"2017:2029");

  script_name(english:"RHEL 7 : openssh (RHSA-2017:2029)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An update for openssh is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

OpenSSH is an SSH protocol implementation supported by a number of
Linux, UNIX, and similar operating systems. It includes the core files
necessary for both the OpenSSH client and server.

The following packages have been upgraded to a later upstream version:
openssh (7.4p1). (BZ#1341754)

Security Fix(es) :

* A covert timing channel flaw was found in the way OpenSSH handled
authentication of non-existent users. A remote unauthenticated
attacker could possibly use this flaw to determine valid user names by
measuring the timing of server responses. (CVE-2016-6210)

* It was found that OpenSSH did not limit password lengths for
password authentication. A remote unauthenticated attacker could use
this flaw to temporarily trigger high CPU consumption in sshd by
sending long passwords. (CVE-2016-6515)

* It was found that ssh-agent could load PKCS#11 modules from
arbitrary paths. An attacker having control of the forwarded
agent-socket on the server, and the ability to write to the filesystem
of the client host, could use this flaw to execute arbitrary code with
the privileges of the user running ssh-agent. (CVE-2016-10009)

* It was found that the host private key material could possibly leak
to the privilege-separated child processes via re-allocated memory. An
attacker able to compromise the privilege-separated process could
therefore obtain the leaked key information. (CVE-2016-10011)

* It was found that the boundary checks in the code implementing
support for pre-authentication compression could have been optimized
out by certain compilers. An attacker able to compromise the
privilege-separated process could possibly use this flaw for further
attacks against the privileged monitor process. (CVE-2016-10012)

Additional Changes :

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.4 Release Notes linked from the References section."
  );
  # https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?3395ff0b"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2017:2029"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-6210"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-6515"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-10009"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-10011"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-10012"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-10708"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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: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:redhat:enterprise_linux:openssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssh-askpass");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssh-cavs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssh-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssh-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssh-keycat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssh-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssh-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssh-server-sysvinit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:pam_ssh_agent_auth");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/08/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/02");
  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:"Red Hat Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.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) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.x", "Red Hat " + 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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2017:2029";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-askpass-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-askpass-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-cavs-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-cavs-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-clients-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-clients-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", reference:"openssh-debuginfo-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-keycat-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-keycat-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-ldap-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-ldap-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-server-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-server-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-server-sysvinit-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-server-sysvinit-7.4p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", reference:"pam_ssh_agent_auth-0.10.3-1.11.el7")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openssh / openssh-askpass / openssh-cavs / openssh-clients / etc");
  }
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K31510510.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(94147);
  script_version("2.11");
  script_cvs_date("Date: 2019/01/04 10:03:40");

  script_cve_id("CVE-2016-6515");

  script_name(english:"F5 Networks BIG-IP : OpenSSH vulnerability (K31510510)");
  script_summary(english:"Checks the BIG-IP version.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote device is missing a vendor-supplied security patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The auth_password function in auth-passwd.c in sshd in OpenSSH before
7.3 does not limit password lengths for password authentication, which
allows remote attackers to cause a denial of service (crypt CPU
consumption) via a long string. (CVE-2016-6515)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K31510510"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K31510510."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_access_policy_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_advanced_firewall_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_acceleration_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_security_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_visibility_and_reporting");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_global_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_link_controller");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_local_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_policy_enforcement_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_wan_optimization_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_webaccelerator");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip_protocol_security_manager");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/10/19");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/20");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"F5 Networks Local Security Checks");

  script_dependencies("f5_bigip_detect.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/BIG-IP/hotfix", "Host/BIG-IP/modules", "Host/BIG-IP/version", "Settings/ParanoidReport");

  exit(0);
}


include("f5_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
version = get_kb_item("Host/BIG-IP/version");
if ( ! version ) audit(AUDIT_OS_NOT, "F5 Networks BIG-IP");
if ( isnull(get_kb_item("Host/BIG-IP/hotfix")) ) audit(AUDIT_KB_MISSING, "Host/BIG-IP/hotfix");
if ( ! get_kb_item("Host/BIG-IP/modules") ) audit(AUDIT_KB_MISSING, "Host/BIG-IP/modules");

sol = "K31510510";
vmatrix = make_array();

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5");
vmatrix["AFM"]["unaffected"] = make_list("13.0.0","12.0.0-12.1.2","11.6.1HF2","11.5.6");

# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5");
vmatrix["AM"]["unaffected"] = make_list("13.0.0","12.0.0-12.1.2","11.6.1HF2","11.5.6");

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5","11.2.1","10.2.1-10.2.4");
vmatrix["APM"]["unaffected"] = make_list("13.0.0","12.0.0-12.1.2","11.6.1HF2","11.5.6");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5","11.2.1","10.2.1-10.2.4");
vmatrix["ASM"]["unaffected"] = make_list("13.0.0","12.0.0-12.1.2","11.6.1HF2","11.5.6");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5","11.2.1");
vmatrix["AVR"]["unaffected"] = make_list("13.0.0","12.0.0-12.1.2","11.6.1HF2","11.5.6");

# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5","11.2.1","10.2.1-10.2.4");
vmatrix["GTM"]["unaffected"] = make_list("11.6.1HF2","11.5.6");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5","11.2.1","10.2.1-10.2.4");
vmatrix["LC"]["unaffected"] = make_list("13.0.0","12.0.0-12.1.2","11.6.1HF2","11.5.6");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5","11.2.1","10.2.1-10.2.4");
vmatrix["LTM"]["unaffected"] = make_list("13.0.0","12.0.0-12.1.2","11.6.1HF2","11.5.6");

# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected"  ] = make_list("11.6.0-11.6.1","11.4.0-11.5.5");
vmatrix["PEM"]["unaffected"] = make_list("13.0.0","12.0.0-12.1.2","11.6.1HF2","11.5.6");


if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  if (report_verbosity > 0) security_hole(port:0, extra:bigip_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = bigip_get_tested_modules();
  audit_extra = "For BIG-IP module(s) " + tested + ",";
  if (tested) audit(AUDIT_INST_VER_NOT_VULN, audit_extra, version);
  else audit(AUDIT_HOST_NOT, "running any of the affected modules");
}

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(102917);
  script_version("1.3");
  script_cvs_date("Date: 2019/04/10 16:10:17");

  script_cve_id("CVE-2016-6515");
  script_bugtraq_id(92212);

  script_name(english:"FreeBSD < 10.3-RELEASE-p21 / 11.0 < 11.0-RELEASE-p12 / 11.1 < 11.1-RELEASE-p1 OpenSSH Password Length DoS (FreeBSD-SA-17:06.openssh)");
  script_summary(english:"Checks for the version of the FreeBSD kernel.");

  script_set_attribute(attribute:"synopsis", value:
"The remote FreeBSD host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The version of the FreeBSD kernel running on the remote host is prior
to 10.3-RELEASE-p21, 11.0 prior to 11.0-RELEASE-p12, or 11.1 prior to
11.1-RELEASE-p1. It, therefore, affected by a flaw in built-in
password authentication in OpenSSH. An unauthenticated, remote
attacker can exploit this issue by sending very long passwords when
PasswordAuthentication is enabled by the system administrator,
resulting in a denial of service condition.

Note that this issue only affects hosts with PasswordAuthentication
enabled in /etc/ssh/sshd_config (the default FreeBSD configuration).

You may workaround this issue by disabling PasswordAuthentication and
restarting sshd.");
  # https://www.freebsd.org/security/advisories/FreeBSD-SA-17:06.openssh.asc
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?beaa28e9");
  script_set_attribute(attribute:"solution", value:
"Upgrade to FreeBSD version 10.3-RELEASE-p21 / 11.0-RELEASE-p12 /
11.1-RELEASE-p1 or later. Alternatively, apply the workaround
referenced in the advisory to disable PasswordAuthentication.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:"vuln_publication_date", value:"2017/08/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"FreeBSD Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info", "Settings/ParanoidReport");

  exit(0);
}

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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/FreeBSD/release");
if (!release) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);

# Patches are available and ipfilter must be enabled with
# "keep state" or "keep frags" rule options enabled
if (report_paranoia < 2) audit(AUDIT_PARANOID);

fix = NULL;

if (release =~ "^FreeBSD-([0-9]|10\.[0-3])($|[^0-9])")
  fix = "FreeBSD-10.3_21";
else if (release =~ "^FreeBSD-11\.0($|[^0-9])")
  fix = "FreeBSD-11.0_12";
else if (release =~ "^FreeBSD-11\.1($|[^0-9])")
  fix = "FreeBSD-11.1_1";

if (isnull(fix) || pkg_cmp(pkg:release, reference:fix) >= 0)
  audit(AUDIT_HOST_NOT, "affected");

report =
  '\n  Installed version : ' + release +
  '\n  Fixed version     : ' + fix +
  '\n';
security_report_v4(port:0, severity:SECURITY_HOLE, extra:report);

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3061-1. 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(92985);
  script_version("2.7");
  script_cvs_date("Date: 2019/09/18 12:31:46");

  script_cve_id("CVE-2016-6210", "CVE-2016-6515");
  script_xref(name:"USN", value:"3061-1");

  script_name(english:"Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS : openssh vulnerabilities (USN-3061-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Eddie Harari discovered that OpenSSH incorrectly handled password
hashing when authenticating non-existing users. A remote attacker
could perform a timing attack and enumerate valid users.
(CVE-2016-6210)

Tomas Kuthan, Andres Rojas, and Javier Nieto discovered that OpenSSH
did not limit password lengths. A remote attacker could use this issue
to cause OpenSSH to consume resources, leading to a denial of service.
(CVE-2016-6515).

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/3061-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected openssh-server package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:canonical:ubuntu_linux:openssh-server");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.04:-:lts");
  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:"vuln_publication_date", value:"2016/08/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/08/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/08/16");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 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:"^(12\.04|14\.04|16\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 14.04 / 16.04", "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:"12.04", pkgname:"openssh-server", pkgver:"1:5.9p1-5ubuntu1.10")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"openssh-server", pkgver:"1:6.6p1-2ubuntu2.8")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"openssh-server", pkgver:"1:7.2p2-4ubuntu2.1")) 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, "openssh-server");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:2029 and 
# Oracle Linux Security Advisory ELSA-2017-2029 respectively.
#

include("compat.inc");

if (description)
{
  script_id(102296);
  script_version("3.4");
  script_cvs_date("Date: 2019/09/27 13:00:38");

  script_cve_id("CVE-2016-10009", "CVE-2016-10011", "CVE-2016-10012", "CVE-2016-10708", "CVE-2016-6210", "CVE-2016-6515");
  script_xref(name:"RHSA", value:"2017:2029");

  script_name(english:"Oracle Linux 7 : openssh (ELSA-2017-2029)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2017:2029 :

An update for openssh is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

OpenSSH is an SSH protocol implementation supported by a number of
Linux, UNIX, and similar operating systems. It includes the core files
necessary for both the OpenSSH client and server.

The following packages have been upgraded to a later upstream version:
openssh (7.4p1). (BZ#1341754)

Security Fix(es) :

* A covert timing channel flaw was found in the way OpenSSH handled
authentication of non-existent users. A remote unauthenticated
attacker could possibly use this flaw to determine valid user names by
measuring the timing of server responses. (CVE-2016-6210)

* It was found that OpenSSH did not limit password lengths for
password authentication. A remote unauthenticated attacker could use
this flaw to temporarily trigger high CPU consumption in sshd by
sending long passwords. (CVE-2016-6515)

* It was found that ssh-agent could load PKCS#11 modules from
arbitrary paths. An attacker having control of the forwarded
agent-socket on the server, and the ability to write to the filesystem
of the client host, could use this flaw to execute arbitrary code with
the privileges of the user running ssh-agent. (CVE-2016-10009)

* It was found that the host private key material could possibly leak
to the privilege-separated child processes via re-allocated memory. An
attacker able to compromise the privilege-separated process could
therefore obtain the leaked key information. (CVE-2016-10011)

* It was found that the boundary checks in the code implementing
support for pre-authentication compression could have been optimized
out by certain compilers. An attacker able to compromise the
privilege-separated process could possibly use this flaw for further
attacks against the privileged monitor process. (CVE-2016-10012)

Additional Changes :

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.4 Release Notes linked from the References section."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2017-August/007091.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected openssh packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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: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:oracle:linux:openssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssh-askpass");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssh-cavs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssh-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssh-keycat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssh-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssh-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssh-server-sysvinit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:pam_ssh_agent_auth");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/08/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/08");
  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) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Oracle Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "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);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 7", "Oracle Linux " + 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, "Oracle Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

flag = 0;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"openssh-7.4p1-11.el7")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"openssh-askpass-7.4p1-11.el7")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"openssh-cavs-7.4p1-11.el7")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"openssh-clients-7.4p1-11.el7")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"openssh-keycat-7.4p1-11.el7")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"openssh-ldap-7.4p1-11.el7")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"openssh-server-7.4p1-11.el7")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"openssh-server-sysvinit-7.4p1-11.el7")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"pam_ssh_agent_auth-0.10.3-1.11.el7")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openssh / openssh-askpass / openssh-cavs / openssh-clients / etc");
}