CentOS 6 : openssl (CESA-2015:0715)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2015:0715 and 
# CentOS Errata and Security Advisory 2015:0715 respectively.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(81997);
  script_version("1.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");

  script_cve_id(
    "CVE-2015-0209",
    "CVE-2015-0286",
    "CVE-2015-0287",
    "CVE-2015-0288",
    "CVE-2015-0289",
    "CVE-2015-0292",
    "CVE-2015-0293"
  );
  script_bugtraq_id(
    73225,
    73227,
    73228,
    73231,
    73232,
    73237,
    73239
  );
  script_xref(name:"RHSA", value:"2015:0715");

  script_name(english:"CentOS 6 : openssl (CESA-2015:0715)");
  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 OpenSSL packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 6.

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.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL
v2/v3) and Transport Layer Security (TLS v1) protocols, as well as a
full-strength, general purpose cryptography library.

  - An invalid pointer use flaw was found in OpenSSL's
    ASN1_TYPE_cmp() function. A remote attacker could crash
    a TLS/SSL client or server using OpenSSL via a specially
    crafted X.509 certificate when the attacker-supplied
    certificate was verified by the application.
    (CVE-2015-0286)

  - An integer underflow flaw, leading to a buffer overflow,
    was found in the way OpenSSL decoded malformed
    Base64-encoded inputs. An attacker able to make an
    application using OpenSSL decode a specially crafted
    Base64-encoded input (such as a PEM file) could use this
    flaw to cause the application to crash. Note: this flaw
    is not exploitable via the TLS/SSL protocol because the
    data being transferred is not Base64-encoded.
    (CVE-2015-0292)

  - A denial of service flaw was found in the way OpenSSL
    handled SSLv2 handshake messages. A remote attacker
    could use this flaw to cause a TLS/SSL server using
    OpenSSL to exit on a failed assertion if it had both
    the SSLv2 protocol and EXPORT-grade cipher suites
    enabled. (CVE-2015-0293)

  - A use-after-free flaw was found in the way OpenSSL
    imported malformed Elliptic Curve private keys. A
    specially crafted key file could cause an application
    using OpenSSL to crash when imported. (CVE-2015-0209)

  - An out-of-bounds write flaw was found in the way OpenSSL
    reused certain ASN.1 structures. A remote attacker could
    possibly use a specially crafted ASN.1 structure that,
    when parsed by an application, would cause that
    application to crash. (CVE-2015-0287)

  - A NULL pointer dereference flaw was found in OpenSSL's
    X.509 certificate handling implementation. A specially
    crafted X.509 certificate could cause an application
    using OpenSSL to crash if the application attempted to
    convert the certificate to a certificate request.
    (CVE-2015-0288)

  - A NULL pointer dereference was found in the way OpenSSL
    handled certain PKCS#7 inputs. An attacker able to make
    an application using OpenSSL verify, decrypt, or parse a
    specially crafted PKCS#7 input could cause that
    application to crash. TLS/SSL clients and servers using
    OpenSSL were not affected by this flaw. (CVE-2015-0289)

Red Hat would like to thank the OpenSSL project for reporting
CVE-2015-0286, CVE-2015-0287, CVE-2015-0288, CVE-2015-0289,
CVE-2015-0292, and CVE-2015-0293. Upstream acknowledges Stephen Henson
of the OpenSSL development team as the original reporter of
CVE-2015-0286, Emilia Käsper of the OpenSSL development team as the
original reporter of CVE-2015-0287, Brian Carpenter as the original
reporter of CVE-2015-0288, Michal Zalewski of Google as the original
reporter of CVE-2015-0289, Robert Dugal and David Ramos as the
original reporters of CVE-2015-0292, and Sean Burford of Google and
Emilia Käsper of the OpenSSL development team as the original
reporters of CVE-2015-0293.

All OpenSSL users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. For the
update to take effect, all services linked to the OpenSSL library must
be restarted, or the system rebooted."
  );
  # http://lists.centos.org/pipermail/centos-announce/2015-March/020988.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?7cf8ffbb"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected openssl packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_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:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssl-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:openssl-static");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/02/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/03/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/24");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2021 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);
if (!get_kb_item("Host/CentOS/release")) audit(AUDIT_OS_NOT, "CentOS");
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;

packages = make_list("openssl", "openssl-devel", "openssl-perl", "openssl-static");
advisory_version = "1.0.1e-30.el6_6.7";
buggy_branch = "1.0.1e-30.el6\.([89]|\d{2,})\|";
foreach currpackage (packages)
{
  rpm_regex = currpackage + "-" + buggy_branch;
  advisory_reference = currpackage + "-" + advisory_version;
  if (! rpm_exists(release:"CentOS-6", rpm:rpm_regex) && rpm_check(release:"CentOS-6", reference:advisory_reference)) flag++;
}


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");