Debian DLA-3499-1 : libapache2-mod-auth-openidc - LTS security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3499. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(178452);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/19");

  script_cve_id("CVE-2021-39191", "CVE-2022-23527");

  script_name(english:"Debian DLA-3499-1 : libapache2-mod-auth-openidc - LTS security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the
dla-3499 advisory.

  - mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions
    as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions
    prior to 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable
    to an open redirect attack by supplying a crafted URL in the `target_link_uri` parameter. A patch in
    version 2.4.9.4 made it so that the `OIDCRedirectURLsAllowed` setting must be applied to the
    `target_link_uri` parameter. There are no known workarounds aside from upgrading to a patched version.
    (CVE-2021-39191)

  - mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP
    server. Versions prior to 2.4.12.2 are vulnerable to Open Redirect. When providing a logout parameter to
    the redirect URI, the existing code in oidc_validate_redirect_url() does not properly check for URLs that
    start with /\t, leading to an open redirect. This issue has been patched in version 2.4.12.2. Users unable
    to upgrade can mitigate the issue by configuring mod_auth_openidc to only allow redirection when the
    destination matches a given regular expression with OIDCRedirectURLsAllowed. (CVE-2022-23527)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993648");
  # https://security-tracker.debian.org/tracker/source-package/libapache2-mod-auth-openidc
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0371ebc9");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2023/dla-3499");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-39191");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-23527");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/libapache2-mod-auth-openidc");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libapache2-mod-auth-openidc packages.

For Debian 10 buster, these problems have been fixed in version 2.3.10.2-1+deb10u3.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-39191");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-23527");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/09/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/07/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/07/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libapache2-mod-auth-openidc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

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

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(10)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 10.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'libapache2-mod-auth-openidc', 'reference': '2.3.10.2-1+deb10u3'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libapache2-mod-auth-openidc');
}