Debian DLA-2688-1 : jetty9 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-2688-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(150904);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/06/24");

  script_cve_id("CVE-2021-28169");

  script_name(english:"Debian DLA-2688-1 : jetty9 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:
"Steven Seeley discovered that in jetty, a Java servlet engine and
webserver, requests to the ConcatServlet and WelcomeFilter are able to
access protected resources within the WEB-INF directory. An attacker
may access sensitive information regarding the implementation of a web
application.

For Debian 9 stretch, this problem has been fixed in version
9.2.30-0+deb9u2.

We recommend that you upgrade your jetty9 packages.

For the detailed security status of jetty9 please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/jetty9

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/2021/06/msg00017.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/jetty9"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/jetty9"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:L/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-2021-28169");
  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:debian:debian_linux:jetty9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libjetty9-extra-java");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libjetty9-java");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/06/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/21");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 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:"9.0", prefix:"jetty9", reference:"9.2.30-0+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libjetty9-extra-java", reference:"9.2.30-0+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libjetty9-java", reference:"9.2.30-0+deb9u2")) flag++;

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