Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : Squid vulnerabilities (USN-6594-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6594-1. 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(189360);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/23");

  script_cve_id("CVE-2023-49285", "CVE-2023-49286", "CVE-2023-50269");
  script_xref(name:"USN", value:"6594-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : Squid vulnerabilities (USN-6594-1)");

  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 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6594-1 advisory.

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug
    Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed
    by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
    (CVE-2023-49285)

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of
    Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process
    management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known
    workarounds for this vulnerability. (CVE-2023-49286)

  - Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through
    2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial
    of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of
    Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is
    configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the
    stable releases can be found in Squid's patch archives. (CVE-2023-50269)

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-6594-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-50269");

  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:"2023/12/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/01/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/01/23");

  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:23.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:squid");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:squid-cgi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:squid-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:squid-openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:squid-purge");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:squidclient");
  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 || '23.04' >< os_release || '23.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 23.04 / 23.10', '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': 'squid', 'pkgver': '4.10-1ubuntu1.9'},
    {'osver': '20.04', 'pkgname': 'squid-cgi', 'pkgver': '4.10-1ubuntu1.9'},
    {'osver': '20.04', 'pkgname': 'squid-common', 'pkgver': '4.10-1ubuntu1.9'},
    {'osver': '20.04', 'pkgname': 'squid-purge', 'pkgver': '4.10-1ubuntu1.9'},
    {'osver': '20.04', 'pkgname': 'squidclient', 'pkgver': '4.10-1ubuntu1.9'},
    {'osver': '22.04', 'pkgname': 'squid', 'pkgver': '5.7-0ubuntu0.22.04.3'},
    {'osver': '22.04', 'pkgname': 'squid-cgi', 'pkgver': '5.7-0ubuntu0.22.04.3'},
    {'osver': '22.04', 'pkgname': 'squid-common', 'pkgver': '5.7-0ubuntu0.22.04.3'},
    {'osver': '22.04', 'pkgname': 'squid-openssl', 'pkgver': '5.7-0ubuntu0.22.04.3'},
    {'osver': '22.04', 'pkgname': 'squid-purge', 'pkgver': '5.7-0ubuntu0.22.04.3'},
    {'osver': '22.04', 'pkgname': 'squidclient', 'pkgver': '5.7-0ubuntu0.22.04.3'},
    {'osver': '23.04', 'pkgname': 'squid', 'pkgver': '5.7-1ubuntu3.2'},
    {'osver': '23.04', 'pkgname': 'squid-cgi', 'pkgver': '5.7-1ubuntu3.2'},
    {'osver': '23.04', 'pkgname': 'squid-common', 'pkgver': '5.7-1ubuntu3.2'},
    {'osver': '23.04', 'pkgname': 'squid-openssl', 'pkgver': '5.7-1ubuntu3.2'},
    {'osver': '23.04', 'pkgname': 'squid-purge', 'pkgver': '5.7-1ubuntu3.2'},
    {'osver': '23.04', 'pkgname': 'squidclient', 'pkgver': '5.7-1ubuntu3.2'},
    {'osver': '23.10', 'pkgname': 'squid', 'pkgver': '6.1-2ubuntu1.2'},
    {'osver': '23.10', 'pkgname': 'squid-cgi', 'pkgver': '6.1-2ubuntu1.2'},
    {'osver': '23.10', 'pkgname': 'squid-common', 'pkgver': '6.1-2ubuntu1.2'},
    {'osver': '23.10', 'pkgname': 'squid-openssl', 'pkgver': '6.1-2ubuntu1.2'},
    {'osver': '23.10', 'pkgname': 'squid-purge', 'pkgver': '6.1-2ubuntu1.2'},
    {'osver': '23.10', 'pkgname': 'squidclient', 'pkgver': '6.1-2ubuntu1.2'}
];

var flag = 0;
foreach 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)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'squid / squid-cgi / squid-common / squid-openssl / squid-purge / etc');
}