Debian DLA-1956-1 : ruby-openid security update

2019-10-11T00:00:00
ID DEBIAN_DLA-1956.NASL
Type nessus
Reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-03-02T00:00:00

Description

ruby-openid performed discovery first, and then verification. This allowed an attacker to change the URL used for discovery and trick the server into connecting to the URL. This server in turn could be a private server not publicly accessible.

Furthermore, if the client that uses this library discloses connection errors, this in turn could disclose information from the private server to the attacker.

For Debian 8

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1956-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(129801);
  script_version("1.2");
  script_cvs_date("Date: 2019/12/19");

  script_cve_id("CVE-2019-11027");

  script_name(english:"Debian DLA-1956-1 : ruby-openid security update");
  script_summary(english:"Checks dpkg output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"ruby-openid performed discovery first, and then verification. This
allowed an attacker to change the URL used for discovery and trick the
server into connecting to the URL. This server in turn could be a
private server not publicly accessible.

Furthermore, if the client that uses this library discloses connection
errors, this in turn could disclose information from the private
server to the attacker.

For Debian 8 'Jessie', this problem has been fixed in version
2.5.0debian-1+deb8u1.

We recommend that you upgrade your ruby-openid packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2019/10/msg00014.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/ruby-openid"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected ruby-openid package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-openid");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/11");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"ruby-openid", reference:"2.5.0debian-1+deb8u1")) flag++;

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