Vulnerabilities > CVE-2014-9278 - Improper Authentication vulnerability in Openbsd Openssh

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2015:0425 and 
# CentOS Errata and Security Advisory 2015:0425 respectively.
#

include("compat.inc");

if (description)
{
  script_id(81894);
  script_version("1.8");
  script_cvs_date("Date: 2020/01/02");

  script_cve_id("CVE-2014-2653", "CVE-2014-9278");
  script_xref(name:"RHSA", value:"2015:0425");

  script_name(english:"CentOS 7 : openssh (CESA-2015:0425)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote CentOS host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated openssh packages that fix two security issues, several bugs,
and add various enhancements are now available for Red Hat Enterprise
Linux 7.

Red Hat Product Security has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

OpenSSH is OpenBSD's SSH (Secure Shell) protocol implementation. These
packages include the core files necessary for both the OpenSSH client
and server.

It was discovered that OpenSSH clients did not correctly verify DNS
SSHFP records. A malicious server could use this flaw to force a
connecting client to skip the DNS SSHFP record check and require the
user to perform manual host verification of the DNS SSHFP record.
(CVE-2014-2653)

It was found that when OpenSSH was used in a Kerberos environment,
remote authenticated users were allowed to log in as a different user
if they were listed in the ~/.k5users file of that user, potentially
bypassing intended authentication restrictions. (CVE-2014-9278)

The openssh packages have been upgraded to upstream version 6.6.1,
which provides a number of bug fixes and enhancements over the
previous version. (BZ#1059667)

Bug fixes :

* An existing /dev/log socket is needed when logging using the syslog
utility, which is not possible for all chroot environments based on
the user's home directories. As a consequence, the sftp commands were
not logged in the chroot setup without /dev/log in the internal sftp
subsystem. With this update, openssh has been enhanced to detect
whether /dev/log exists. If /dev/log does not exist, processes in the
chroot environment use their master processes for logging.
(BZ#1083482)

* The buffer size for a host name was limited to 64 bytes. As a
consequence, when a host name was 64 bytes long or longer, the
ssh-keygen utility failed. The buffer size has been increased to fix
this bug, and ssh-keygen no longer fails in the described situation.
(BZ#1097665)

* Non-ASCII characters have been replaced by their octal
representations in banner messages in order to prevent terminal
re-programming attacks. Consequently, banners containing UTF-8 strings
were not correctly displayed in a client. With this update, banner
messages are processed according to RFC 3454, control characters have
been removed, and banners containing UTF-8 strings are now displayed
correctly. (BZ#1104662)

* Red Hat Enterprise Linux uses persistent Kerberos credential caches,
which are shared between sessions. Previously, the
GSSAPICleanupCredentials option was set to 'yes' by default.
Consequently, removing a Kerberos cache on logout could remove
unrelated credentials of other sessions, which could make the system
unusable. To fix this bug, GSSAPICleanupCredentials is set by default
to 'no'. (BZ#1134447)

* Access permissions for the /etc/ssh/moduli file were set to 0600,
which was unnecessarily strict. With this update, the permissions for
/etc/ssh/moduli have been changed to 0644 to make the access to the
file easier. (BZ#1134448)

* Due to the KRB5CCNAME variable being truncated, the Kerberos ticket
cache was not found after login using a Kerberos-enabled SSH
connection. The underlying source code has been modified to fix this
bug, and Kerberos authentication works as expected in the described
situation. (BZ#1161173)

Enhancements :

* When the sshd daemon is configured to force the internal SFTP
session, a connection other then SFTP is used, the appropriate message
is logged to the /var/log/secure file. (BZ#1130198)

* The sshd-keygen service was run using the
'ExecStartPre=-/usr/sbin/sshd-keygen' option in the sshd.service unit
file. With this update, the separate sshd-keygen.service unit file has
been added, and sshd.service has been adjusted to require
sshd-keygen.service. (BZ#1134997)

Users of openssh are advised to upgrade to these updated packages,
which correct these issues and add these enhancements."
  );
  # https://lists.centos.org/pipermail/centos-cr-announce/2015-March/001725.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?9f2883d9"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected openssh packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2014-2653");
  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:centos:centos:openssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssh-askpass");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssh-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssh-keycat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssh-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssh-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssh-server-sysvinit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:pam_ssh_agent_auth");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/03/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/03/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/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/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 7.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/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, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"openssh-6.6.1p1-11.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"openssh-askpass-6.6.1p1-11.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"openssh-clients-6.6.1p1-11.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"openssh-keycat-6.6.1p1-11.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"openssh-ldap-6.6.1p1-11.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"openssh-server-6.6.1p1-11.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"openssh-server-sysvinit-6.6.1p1-11.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"pam_ssh_agent_auth-0.9.3-9.11.el7")) flag++;


if (flag)
{
  cr_plugin_caveat = '\n' +
    'NOTE: The security advisory associated with this vulnerability has a\n' +
    'fixed package version that may only be available in the continuous\n' +
    'release (CR) repository for CentOS, until it is present in the next\n' +
    'point release of CentOS.\n\n' +

    'If an equal or higher package level does not exist in the baseline\n' +
    'repository for your major version of CentOS, then updates from the CR\n' +
    'repository will need to be applied in order to address the\n' +
    'vulnerability.\n';
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get() + cr_plugin_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-clients / openssh-keycat / etc");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2015:0425. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(81635);
  script_version("1.12");
  script_cvs_date("Date: 2019/10/24 15:35:39");

  script_cve_id("CVE-2014-2653", "CVE-2014-9278");
  script_xref(name:"RHSA", value:"2015:0425");

  script_name(english:"RHEL 7 : openssh (RHSA-2015:0425)");
  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:
"Updated openssh packages that fix two security issues, several bugs,
and add various enhancements are now available for Red Hat Enterprise
Linux 7.

Red Hat Product Security has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

OpenSSH is OpenBSD's SSH (Secure Shell) protocol implementation. These
packages include the core files necessary for both the OpenSSH client
and server.

It was discovered that OpenSSH clients did not correctly verify DNS
SSHFP records. A malicious server could use this flaw to force a
connecting client to skip the DNS SSHFP record check and require the
user to perform manual host verification of the DNS SSHFP record.
(CVE-2014-2653)

It was found that when OpenSSH was used in a Kerberos environment,
remote authenticated users were allowed to log in as a different user
if they were listed in the ~/.k5users file of that user, potentially
bypassing intended authentication restrictions. (CVE-2014-9278)

The openssh packages have been upgraded to upstream version 6.6.1,
which provides a number of bug fixes and enhancements over the
previous version. (BZ#1059667)

Bug fixes :

* An existing /dev/log socket is needed when logging using the syslog
utility, which is not possible for all chroot environments based on
the user's home directories. As a consequence, the sftp commands were
not logged in the chroot setup without /dev/log in the internal sftp
subsystem. With this update, openssh has been enhanced to detect
whether /dev/log exists. If /dev/log does not exist, processes in the
chroot environment use their master processes for logging.
(BZ#1083482)

* The buffer size for a host name was limited to 64 bytes. As a
consequence, when a host name was 64 bytes long or longer, the
ssh-keygen utility failed. The buffer size has been increased to fix
this bug, and ssh-keygen no longer fails in the described situation.
(BZ#1097665)

* Non-ASCII characters have been replaced by their octal
representations in banner messages in order to prevent terminal
re-programming attacks. Consequently, banners containing UTF-8 strings
were not correctly displayed in a client. With this update, banner
messages are processed according to RFC 3454, control characters have
been removed, and banners containing UTF-8 strings are now displayed
correctly. (BZ#1104662)

* Red Hat Enterprise Linux uses persistent Kerberos credential caches,
which are shared between sessions. Previously, the
GSSAPICleanupCredentials option was set to 'yes' by default.
Consequently, removing a Kerberos cache on logout could remove
unrelated credentials of other sessions, which could make the system
unusable. To fix this bug, GSSAPICleanupCredentials is set by default
to 'no'. (BZ#1134447)

* Access permissions for the /etc/ssh/moduli file were set to 0600,
which was unnecessarily strict. With this update, the permissions for
/etc/ssh/moduli have been changed to 0644 to make the access to the
file easier. (BZ#1134448)

* Due to the KRB5CCNAME variable being truncated, the Kerberos ticket
cache was not found after login using a Kerberos-enabled SSH
connection. The underlying source code has been modified to fix this
bug, and Kerberos authentication works as expected in the described
situation. (BZ#1161173)

Enhancements :

* When the sshd daemon is configured to force the internal SFTP
session, a connection other then SFTP is used, the appropriate message
is logged to the /var/log/secure file. (BZ#1130198)

* The sshd-keygen service was run using the
'ExecStartPre=-/usr/sbin/sshd-keygen' option in the sshd.service unit
file. With this update, the separate sshd-keygen.service unit file has
been added, and sshd.service has been adjusted to require
sshd-keygen.service. (BZ#1134997)

Users of openssh are advised to upgrade to these updated packages,
which correct these issues and add these enhancements."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2015:0425"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2014-2653"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2014-9278"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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: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-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:7.3");
  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:"2014/03/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/03/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/05");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2019 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-2015:0425";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-askpass-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-askpass-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-clients-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-clients-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", reference:"openssh-debuginfo-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-keycat-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-keycat-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-ldap-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-ldap-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-server-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-server-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"openssh-server-sysvinit-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"openssh-server-sysvinit-6.6.1p1-11.el7")) flag++;

  if (rpm_check(release:"RHEL7", reference:"pam_ssh_agent_auth-0.9.3-9.11.el7")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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-clients / openssh-debuginfo / etc");
  }
}

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

# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2019-0146. The text
# itself is copyright (C) ZTE, Inc.

include("compat.inc");

if (description)
{
  script_id(127415);
  script_version("1.3");
  script_cvs_date("Date: 2019/09/24 11:01:33");

  script_cve_id(
    "CVE-2006-0225",
    "CVE-2006-4924",
    "CVE-2006-5051",
    "CVE-2006-5794",
    "CVE-2007-3102",
    "CVE-2010-4755",
    "CVE-2010-5107",
    "CVE-2014-2532",
    "CVE-2014-2653",
    "CVE-2014-9278",
    "CVE-2015-5600",
    "CVE-2015-8325",
    "CVE-2016-0777",
    "CVE-2016-1908",
    "CVE-2016-6210"
  );

  script_name(english:"NewStart CGSL MAIN 4.05 : openssh-latest Multiple Vulnerabilities (NS-SA-2019-0146)");

  script_set_attribute(attribute:"synopsis", value:
"The remote machine is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version MAIN 4.05, has openssh-latest packages installed that are affected by
multiple vulnerabilities:

  - scp in OpenSSH 4.2p1 allows attackers to execute
    arbitrary commands via filenames that contain shell
    metacharacters or spaces, which are expanded twice.
    (CVE-2006-0225)

  - sshd in OpenSSH before 4.4, when using the version 1 SSH
    protocol, allows remote attackers to cause a denial of
    service (CPU consumption) via an SSH packet that
    contains duplicate blocks, which is not properly handled
    by the CRC compensation attack detector. (CVE-2006-4924)

  - Signal handler race condition in OpenSSH before 4.4
    allows remote attackers to cause a denial of service
    (crash), and possibly execute arbitrary code if GSSAPI
    authentication is enabled, via unspecified vectors that
    lead to a double-free. (CVE-2006-5051)

  - Unspecified vulnerability in the sshd Privilege
    Separation Monitor in OpenSSH before 4.5 causes weaker
    verification that authentication has been successful,
    which might allow attackers to bypass authentication.
    NOTE: as of 20061108, it is believed that this issue is
    only exploitable by leveraging vulnerabilities in the
    unprivileged process, which are not known to exist.
    (CVE-2006-5794)

  - Unspecified vulnerability in the
    linux_audit_record_event function in OpenSSH 4.3p2, as
    used on Fedora Core 6 and possibly other systems, allows
    remote attackers to write arbitrary characters to an
    audit log via a crafted username. NOTE: some of these
    details are obtained from third party information.
    (CVE-2007-3102)

  - The (1) remote_glob function in sftp-glob.c and the (2)
    process_put function in sftp.c in OpenSSH 5.8 and
    earlier, as used in FreeBSD 7.3 and 8.1, NetBSD 5.0.2,
    OpenBSD 4.7, and other products, allow remote
    authenticated users to cause a denial of service (CPU
    and memory consumption) via crafted glob expressions
    that do not match any pathnames, as demonstrated by glob
    expressions in SSH_FXP_STAT requests to an sftp daemon,
    a different vulnerability than CVE-2010-2632.
    (CVE-2010-4755)

  - The default configuration of OpenSSH through 6.1
    enforces a fixed time limit between establishing a TCP
    connection and completing a login, which makes it easier
    for remote attackers to cause a denial of service
    (connection-slot exhaustion) by periodically making many
    new TCP connections. (CVE-2010-5107)

  - It was found that OpenSSH did not properly handle
    certain AcceptEnv parameter values with wildcard
    characters. A remote attacker could use this flaw to
    bypass intended environment variable restrictions.
    (CVE-2014-2532)

  - It was discovered that OpenSSH clients did not correctly
    verify DNS SSHFP records. A malicious server could use
    this flaw to force a connecting client to skip the DNS
    SSHFP record check and require the user to perform
    manual host verification of the DNS SSHFP record.
    (CVE-2014-2653)

  - It was found that when OpenSSH was used in a Kerberos
    environment, remote authenticated users were allowed to
    log in as a different user if they were listed in the
    ~/.k5users file of that user, potentially bypassing
    intended authentication restrictions. (CVE-2014-9278)

  - It was discovered that the OpenSSH sshd daemon did not
    check the list of keyboard-interactive authentication
    methods for duplicates. A remote attacker could use this
    flaw to bypass the MaxAuthTries limit, making it easier
    to perform password guessing attacks. (CVE-2015-5600)

  - It was discovered that the OpenSSH sshd daemon fetched
    PAM environment settings before running the login
    program. In configurations with UseLogin=yes and the
    pam_env PAM module configured to read user environment
    settings, a local user could use this flaw to execute
    arbitrary code as root. (CVE-2015-8325)

  - An information leak flaw was found in the way the
    OpenSSH client roaming feature was implemented. A
    malicious server could potentially use this flaw to leak
    portions of memory (possibly including private SSH keys)
    of a successfully authenticated OpenSSH client.
    (CVE-2016-0777)

  - An access flaw was discovered in OpenSSH; the OpenSSH
    client did not correctly handle failures to generate
    authentication cookies for untrusted X11 forwarding. A
    malicious or compromised remote X application could
    possibly use this flaw to establish a trusted connection
    to the local X server, even if only untrusted X11
    forwarding was requested. (CVE-2016-1908)

  - 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)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/notice/NS-SA-2019-0146");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL openssh-latest packages. Note that updated packages may not be available yet. Please contact
ZTE for more information.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2006-5051");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(362, 399);

  script_set_attribute(attribute:"vuln_publication_date", value:"2006/01/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 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/ZTE-CGSL/release", "Host/ZTE-CGSL/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/ZTE-CGSL/release");
if (isnull(release) || release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, "NewStart Carrier Grade Server Linux");

if (release !~ "CGSL MAIN 4.05")
  audit(AUDIT_OS_NOT, 'NewStart CGSL MAIN 4.05');

if (!get_kb_item("Host/ZTE-CGSL/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, "NewStart Carrier Grade Server Linux", cpu);

flag = 0;

pkgs = {
  "CGSL MAIN 4.05": [
    "openssh-latest-7.9p1-1.el6.cgsl7741",
    "openssh-latest-askpass-7.9p1-1.el6.cgsl7741",
    "openssh-latest-cavs-7.9p1-1.el6.cgsl7741",
    "openssh-latest-clients-7.9p1-1.el6.cgsl7741",
    "openssh-latest-debuginfo-7.9p1-1.el6.cgsl7741",
    "openssh-latest-keycat-7.9p1-1.el6.cgsl7741",
    "openssh-latest-ldap-7.9p1-1.el6.cgsl7741",
    "openssh-latest-server-7.9p1-1.el6.cgsl7741"
  ]
};
pkg_list = pkgs[release];

foreach (pkg in pkg_list)
  if (rpm_check(release:"ZTE " + release, reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "openssh-latest");
}