Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : Apache HTTP Server vulnerabilities (USN-7639-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7639-1. 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(242284);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/08/12");

  script_cve_id(
    "CVE-2024-42516",
    "CVE-2024-43204",
    "CVE-2024-47252",
    "CVE-2025-23048",
    "CVE-2025-49630",
    "CVE-2025-49812",
    "CVE-2025-53020"
  );
  script_xref(name:"IAVA", value:"2025-A-0508-S");
  script_xref(name:"USN", value:"7639-1");

  script_name(english:"Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : Apache HTTP Server vulnerabilities (USN-7639-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-7639-1 advisory.

    It was discovered that the Apache HTTP Server incorrectly handled certain Content-Type response headers. A
    remote attacker could possibly use this issue to perform HTTP response splitting attacks. (CVE-2024-42516)

    xiaojunjie discovered that the Apache HTTP Server mod_proxy module incorrectly handled certain requests. A
    remote attacker could possibly use this issue to send outbound proxy requests to an arbitrary URL.
    (CVE-2024-43204)

    John Runyon discovered that the Apache HTTP Server mod_ssl module incorrectly escaped certain data. A
    remote attacker could possibly use this issue to insert escape characters into log files. (CVE-2024-47252)

    Sven Hebrok, Felix Cramer, Tim Storm, Maximilian Radoy, and Juraj Somorovsky discovered that the Apache
    HTTP Server mod_ssl module incorrectly handled TLS 1.3 session resumption. A remote attacker could
    possibly use this issue to bypass access control. (CVE-2025-23048)

    Anthony CORSIEZ discovered that the Apache HTTP Server mod_proxy_http2 module incorrectly handled missing
    host headers. A remote attacker could possibly use this issue to cause the server to crash, resulting in a
    denial of service. (CVE-2025-49630)

    Robert Merget discovered that the Apache HTTP Server mod_ssl module incorrectly handled TLS upgrades. A
    remote attacker could possibly use this issue to hijack an HTTP session. This update removes the old
    SSLEngine optional configuration option, possibly requiring a configuration change in certain
    environments. (CVE-2025-49812)

    Gal Bar Nahum discovered that the Apache HTTP Server incorrectly handled certain memory operations. A
    remote attacker could possibly use this issue to cause the server to consume resources, leading to a
    denial of service. (CVE-2025-53020)

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

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://ubuntu.com/security/notices/USN-7639-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/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:H/I:H/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-2025-23048");

  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:"2025/07/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/07/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:"cpe:/o:canonical:ubuntu_linux:25.04");
  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_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2025 Canonical, Inc. / NASL script (C) 2025 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 (! ('22.04' >< os_release || '24.04' >< os_release || '25.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 24.04 / 25.04', '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': '22.04', 'pkgname': 'apache2', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'apache2-dev', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'apache2-ssl-dev', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'libapache2-mod-md', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '22.04', 'pkgname': 'libapache2-mod-proxy-uwsgi', 'pkgver': '2.4.52-1ubuntu4.15'},
    {'osver': '24.04', 'pkgname': 'apache2', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'apache2-dev', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'apache2-ssl-dev', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'libapache2-mod-md', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '24.04', 'pkgname': 'libapache2-mod-proxy-uwsgi', 'pkgver': '2.4.58-1ubuntu8.7'},
    {'osver': '25.04', 'pkgname': 'apache2', 'pkgver': '2.4.63-1ubuntu1.1'},
    {'osver': '25.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.63-1ubuntu1.1'},
    {'osver': '25.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.63-1ubuntu1.1'},
    {'osver': '25.04', 'pkgname': 'apache2-dev', 'pkgver': '2.4.63-1ubuntu1.1'},
    {'osver': '25.04', 'pkgname': 'apache2-ssl-dev', 'pkgver': '2.4.63-1ubuntu1.1'},
    {'osver': '25.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.63-1ubuntu1.1'},
    {'osver': '25.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.63-1ubuntu1.1'},
    {'osver': '25.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.63-1ubuntu1.1'}
];

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 (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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');
}