Debian DLA-1336-1 : rubygems security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1336-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(108770);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2018-1000075", "CVE-2018-1000076", "CVE-2018-1000077", "CVE-2018-1000078");

  script_name(english:"Debian DLA-1336-1 : rubygems security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Multiple vulnerabilities were found in rubygems, a package management
framework for Ruby. 

CVE-2018-1000075

A negative size vulnerability in ruby gem package tar header that
could cause an infinite loop.

CVE-2018-1000076

Ruby gems package improperly verifies cryptographic signatures. A
mis-signed gem could be installed if the tarball contains multiple gem
signatures.

CVE-2018-1000077

An improper input validation vulnerability in ruby gems specification
homepage attribute could allow malicious gem to set an invalid
homepage URL.

CVE-2018-1000078

Cross Site Scripting (XSS) vulnerability in gem server display of
homepage attribute

For Debian 7 'Wheezy', these problems have been fixed in version
1.8.24-1+deb7u2.

We recommend that you upgrade your rubygems 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/2018/04/msg00000.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/rubygems"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected rubygems, rubygems-doc, and rubygems1.8 packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rubygems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rubygems-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rubygems1.8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2021 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:"7.0", prefix:"rubygems", reference:"1.8.24-1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"rubygems-doc", reference:"1.8.24-1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"rubygems1.8", reference:"1.8.24-1+deb7u2")) 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");