Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS : Apache HTTP Server regression (USN-6885-2)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6885-2. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(202231);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");
  script_xref(name:"USN", value:"6885-2");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS : Apache HTTP Server regression (USN-6885-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by a vulnerability as
referenced in the USN-6885-2 advisory.

    USN-6885-1 fixed vulnerabilities in Apache HTTP Server. One of the security fixes introduced a regression
    when proxying requests to a HTTP/2 server. This update fixes the problem.

    We apologize for the inconvenience.

    Original advisory details:

    Marc Stern discovered that the Apache HTTP Server incorrectly handled

    serving WebSocket protocol upgrades over HTTP/2 connections. A remote

    attacker could possibly use this issue to cause the server to crash,

    resulting in a denial of service. (CVE-2024-36387)

    Orange Tsai discovered that the Apache HTTP Server mod_proxy module

    incorrectly sent certain request URLs with incorrect encodings to backends.

    A remote attacker could possibly use this issue to bypass authentication.

    (CVE-2024-38473)

    Orange Tsai discovered that the Apache HTTP Server mod_rewrite module

    incorrectly handled certain substitutions. A remote attacker could possibly

    use this issue to execute scripts in directories not directly reachable

    by any URL, or cause a denial of service. Some environments may require

    using the new UnsafeAllow3F flag to handle unsafe substitutions.

    (CVE-2024-38474, CVE-2024-38475, CVE-2024-39573)

    Orange Tsai discovered that the Apache HTTP Server incorrectly handled

    certain response headers. A remote attacker could possibly use this issue

    to obtain sensitive information, execute local scripts, or perform SSRF

    attacks. (CVE-2024-38476)

    Orange Tsai discovered that the Apache HTTP Server mod_proxy module

    incorrectly handled certain requests. A remote attacker could possibly use

    this issue to cause the server to crash, resulting in a denial of service.

    (CVE-2024-38477)

    It was discovered that the Apache HTTP Server incorrectly handled certain

    handlers configured via AddType. A remote attacker could possibly use this

    issue to obtain source code. (CVE-2024-39884)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-6885-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"None");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/07/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/07/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/07/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-ssl-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-suexec-custom");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-suexec-pristine");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-md");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-proxy-uwsgi");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2024 Canonical, Inc. / NASL script (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 24.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '20.04', 'pkgname': 'apache2', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'apache2-dev', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'apache2-ssl-dev', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'libapache2-mod-md', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '20.04', 'pkgname': 'libapache2-mod-proxy-uwsgi', 'pkgver': '2.4.41-4ubuntu3.20'},
    {'osver': '22.04', 'pkgname': 'apache2', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'apache2-dev', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'apache2-ssl-dev', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'libapache2-mod-md', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '22.04', 'pkgname': 'libapache2-mod-proxy-uwsgi', 'pkgver': '2.4.52-1ubuntu4.11'},
    {'osver': '24.04', 'pkgname': 'apache2', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'apache2-dev', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'apache2-ssl-dev', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'libapache2-mod-md', 'pkgver': '2.4.58-1ubuntu8.3'},
    {'osver': '24.04', 'pkgname': 'libapache2-mod-proxy-uwsgi', 'pkgver': '2.4.58-1ubuntu8.3'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'apache2 / apache2-bin / apache2-data / apache2-dev / etc');
}