OpenSSL 1.1.0 < 1.1.0l Multiple Vulnerabilities

2019-08-23T00:00:00
ID OPENSSL_1_1_0L.NASL
Type nessus
Reporter This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2021-02-12T00:00:00

Description

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by the following vulnerabilities :

  • Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. OpenSSL versions 1.1.1, 1.1.0 and 1.0.2 are affected by this issue. (CVE-2019-1547)

  • OpenSSL has internal defaults for a directory tree where it can find a configuration file as well as certificates used for verification in TLS. This directory is most commonly referred to as OPENSSLDIR, and is configurable with the --prefix / --openssldir configuration options. For OpenSSL versions 1.1.0 and 1.1.1, the mingw configuration targets assume that resulting programs and libraries are installed in a Unix-like environment and the default prefix for program installation as well as for OPENSSLDIR should be '/usr/local'. However, mingw programs are Windows programs, and as such, find themselves looking at sub-directories of 'C:/usr/local', which may be world writable, which enables untrusted users to modify OpenSSL's default configuration, insert CA certificates, modify (or even replace) existing engine modules, etc. For OpenSSL 1.0.2, '/usr/local/ssl' is used as default for OPENSSLDIR on all Unix and Windows targets, including Visual C builds. However, some build instructions for the diverse Windows targets on 1.0.2 encourage you to specify your own --prefix. OpenSSL versions 1.1.1, 1.1.0 and 1.0.2 are affected by this issue. Due to the limited scope of affected deployments this has been assessed as low severity and therefore we are not creating new releases at this time. (CVE-2019-1552)

  • In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. (CVE-2019-1563)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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

include('compat.inc');

if (description)
{
  script_id(128117);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/02/12");

  script_cve_id("CVE-2019-1547", "CVE-2019-1552", "CVE-2019-1563");
  script_xref(name:"IAVA", value:"2019-A-0303-S");

  script_name(english:"OpenSSL 1.1.0 < 1.1.0l Multiple Vulnerabilities");
  script_summary(english:"Performs a banner check.");

  script_set_attribute(attribute:"synopsis", value:
"The remote service is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of tested product installed on the remote host is prior
to tested version. It is, therefore, affected by the following
vulnerabilities :

  - Normally in OpenSSL EC groups always have a co-factor
    present and this is used in side channel resistant code
    paths. However, in some cases, it is possible to
    construct a group using explicit parameters (instead of
    using a named curve). In those cases it is possible
    that such a group does not have the cofactor present.
    This can occur even where all the parameters match a
    known named curve. If such a curve is used then
    OpenSSL falls back to non-side channel resistant code
    paths which may result in full key recovery during an
    ECDSA signature operation. In order to be vulnerable an
    attacker would have to have the ability to time the
    creation of a large number of signatures where explicit
    parameters with no co-factor present are in use by an
    application using libcrypto. For the avoidance of doubt
    libssl is not vulnerable because explicit parameters are
    never used. OpenSSL versions 1.1.1, 1.1.0 and 1.0.2 are
    affected by this issue. (CVE-2019-1547)

  - OpenSSL has internal defaults for a directory tree where
    it can find a configuration file as well as certificates
    used for verification in TLS. This directory is most
    commonly referred to as OPENSSLDIR, and is configurable
    with the --prefix / --openssldir configuration options.
    For OpenSSL versions 1.1.0 and 1.1.1, the mingw
    configuration targets assume that resulting programs and
    libraries are installed in a Unix-like environment and
    the default prefix for program installation as well as
    for OPENSSLDIR should be '/usr/local'. However, mingw
    programs are Windows programs, and as such, find
    themselves looking at sub-directories of 'C:/usr/local',
    which may be world writable, which enables untrusted
    users to modify OpenSSL's default configuration, insert
    CA certificates, modify (or even replace) existing
    engine modules, etc. For OpenSSL 1.0.2, '/usr/local/ssl'
    is used as default for OPENSSLDIR on all Unix and
    Windows targets, including Visual C builds. However,
    some build instructions for the diverse Windows targets
    on 1.0.2 encourage you to specify your own --prefix.
    OpenSSL versions 1.1.1, 1.1.0 and 1.0.2 are affected by
    this issue. Due to the limited scope of affected
    deployments this has been assessed as low severity and
    therefore we are not creating new releases at this time.
    (CVE-2019-1552)

  - In situations where an attacker receives automated
    notification of the success or failure of a decryption
    attempt an attacker, after sending a very large number
    of messages to be decrypted, can recover a CMS/PKCS7
    transported encryption key or decrypt any RSA encrypted
    message that was encrypted with the public RSA key,
    using a Bleichenbacher padding oracle attack.
    Applications are not affected if they use a certificate
    together with the private RSA key to the CMS_decrypt or
    PKCS7_decrypt functions to select the correct recipient
    info to decrypt. (CVE-2019-1563)


Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
  # https://github.com/openssl/openssl/commit/b15a19c148384e73338aa7c5b12652138e35ed28
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?98eccc7c");
  # https://github.com/openssl/openssl/commit/e32bc855a81a2d48d215c506bdeb4f598045f7e9
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?39d1f723");
  script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20190730.txt");
  script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20190910.txt");
  script_set_attribute(attribute:"solution", value:
"Upgrade to OpenSSL version 1.1.0l or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-1563");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/23");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:openssl:openssl");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("openssl_version.nasl");
  script_require_keys("openssl/port");

  exit(0);
}

include("openssl_version.inc");

openssl_check_version(fixed:"1.1.0l", min:"1.1.0", severity:SECURITY_WARNING);