Scientific Linux Security Update : openssh on SL7.x x86_64 (20160114)

2016-01-15T00:00:00
ID SL_20160114_OPENSSH_ON_SL7_X.NASL
Type nessus
Reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2016-01-15T00:00:00

Description

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)

A buffer overflow flaw was found in the way the OpenSSH client roaming feature was implemented. A malicious server could potentially use this flaw to execute arbitrary code on a successfully authenticated OpenSSH client if that client used certain non-default configuration options. (CVE-2016-0778)

After installing this update, the OpenSSH server daemon (sshd) will be restarted automatically.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

include("compat.inc");

if (description)
{
  script_id(87938);
  script_version("2.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/25");

  script_cve_id("CVE-2016-0777", "CVE-2016-0778");

  script_name(english:"Scientific Linux Security Update : openssh on SL7.x x86_64 (20160114)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Scientific Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"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)

A buffer overflow flaw was found in the way the OpenSSH client roaming
feature was implemented. A malicious server could potentially use this
flaw to execute arbitrary code on a successfully authenticated OpenSSH
client if that client used certain non-default configuration options.
(CVE-2016-0778)

After installing this update, the OpenSSH server daemon (sshd) will be
restarted automatically."
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1601&L=scientific-linux-errata&F=&S=&P=7514
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?7f5e6a97"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:S/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:openssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:openssh-askpass");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:openssh-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:openssh-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:openssh-keycat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:openssh-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:openssh-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:openssh-server-sysvinit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:pam_ssh_agent_auth");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/01/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/01/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Scientific Linux Local Security Checks");

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

  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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific 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 (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);


flag = 0;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"openssh-6.6.1p1-23.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"openssh-askpass-6.6.1p1-23.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"openssh-clients-6.6.1p1-23.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"openssh-debuginfo-6.6.1p1-23.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"openssh-keycat-6.6.1p1-23.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"openssh-ldap-6.6.1p1-23.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"openssh-server-6.6.1p1-23.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"openssh-server-sysvinit-6.6.1p1-23.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"pam_ssh_agent_auth-0.9.3-9.23.el7_2")) 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, "openssh / openssh-askpass / openssh-clients / openssh-debuginfo / etc");
}