Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : .NET vulnerabilities (USN-8641-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8641-1. 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(365385);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/13");

  script_cve_id(
    "CVE-2026-62899",
    "CVE-2026-62900",
    "CVE-2026-62901",
    "CVE-2026-62909"
  );
  script_xref(name:"USN", value:"8641-1");

  script_name(english:"Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : .NET vulnerabilities (USN-8641-1)");

  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 / 26.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-8641-1 advisory.

    Miha Zupan discovered that .NET did not properly interpret certain HTTP requests. An attacker could
    possibly use this issue to perform request smuggling and bypass a security feature. (CVE-2026-62899)

    Ivan Demchuk discovered that .NET did not properly handle the removal of sensitive information before
    storage or transfer. An attacker could possibly use this issue to disclose sensitive information.
    (CVE-2026-62900)

    Kevin Gosse discovered that .NET did not properly check an input for a loop condition. An attacker could
    possibly use this issue to cause a denial of service. (CVE-2026-62901)

    Kevin Gosse discovered that .NET did not properly perform error checking when securing shared resources
    used for diagnostics IPC. An attacker could possibly use this issue to elevate privileges.
    (CVE-2026-62909)

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-8641-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/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-2026-62909");

  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:"2026/08/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/13");

  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:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:aspnetcore-runtime-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:aspnetcore-runtime-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:aspnetcore-runtime-dbg-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:aspnetcore-runtime-dbg-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:aspnetcore-targeting-pack-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:aspnetcore-targeting-pack-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-apphost-pack-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-apphost-pack-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-host-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-host-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-hostfxr-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-hostfxr-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-runtime-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-runtime-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-runtime-dbg-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-runtime-dbg-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-10.0-source-built-artifacts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-8.0-source-built-artifacts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-aot-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-dbg-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-dbg-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-targeting-pack-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-targeting-pack-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-templates-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet-templates-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dotnet8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:netstandard-targeting-pack-2.1-8.0");
  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) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.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 || '26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 24.04 / 26.04', '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': 'aspnetcore-runtime-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'aspnetcore-runtime-dbg-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'aspnetcore-targeting-pack-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-apphost-pack-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-host-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-hostfxr-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-runtime-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-runtime-dbg-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-sdk-8.0', 'pkgver': '8.0.130-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-sdk-8.0-source-built-artifacts', 'pkgver': '8.0.130-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-sdk-dbg-8.0', 'pkgver': '8.0.130-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-targeting-pack-8.0', 'pkgver': '8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet-templates-8.0', 'pkgver': '8.0.130-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'dotnet8', 'pkgver': '8.0.130-8.0.30-0ubuntu1~22.04.1'},
    {'osver': '22.04', 'pkgname': 'netstandard-targeting-pack-2.1-8.0', 'pkgver': '8.0.130-0ubuntu1~22.04.1'},
    {'osver': '24.04', 'pkgname': 'aspnetcore-runtime-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'aspnetcore-runtime-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'aspnetcore-runtime-dbg-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'aspnetcore-runtime-dbg-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'aspnetcore-targeting-pack-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'aspnetcore-targeting-pack-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-apphost-pack-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-apphost-pack-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-host-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-host-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-hostfxr-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-hostfxr-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-runtime-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-runtime-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-runtime-dbg-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-runtime-dbg-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-sdk-10.0', 'pkgver': '10.0.111-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-sdk-10.0-source-built-artifacts', 'pkgver': '10.0.111-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-sdk-8.0', 'pkgver': '8.0.130-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-sdk-8.0-source-built-artifacts', 'pkgver': '8.0.130-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-sdk-aot-10.0', 'pkgver': '10.0.111-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-sdk-dbg-10.0', 'pkgver': '10.0.111-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-sdk-dbg-8.0', 'pkgver': '8.0.130-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-targeting-pack-10.0', 'pkgver': '10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-targeting-pack-8.0', 'pkgver': '8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-templates-10.0', 'pkgver': '10.0.111-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet-templates-8.0', 'pkgver': '8.0.130-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet10', 'pkgver': '10.0.111-10.0.11-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'dotnet8', 'pkgver': '8.0.130-8.0.30-0ubuntu1~24.04.1'},
    {'osver': '24.04', 'pkgname': 'netstandard-targeting-pack-2.1-8.0', 'pkgver': '8.0.130-0ubuntu1~24.04.1'},
    {'osver': '26.04', 'pkgname': 'aspnetcore-runtime-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'aspnetcore-runtime-dbg-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'aspnetcore-targeting-pack-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-apphost-pack-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-host-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-hostfxr-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-runtime-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-runtime-dbg-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-sdk-10.0', 'pkgver': '10.0.111-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-sdk-10.0-source-built-artifacts', 'pkgver': '10.0.111-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-sdk-aot-10.0', 'pkgver': '10.0.111-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-sdk-dbg-10.0', 'pkgver': '10.0.111-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-targeting-pack-10.0', 'pkgver': '10.0.11-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet-templates-10.0', 'pkgver': '10.0.111-0ubuntu1~26.04.1'},
    {'osver': '26.04', 'pkgname': 'dotnet10', 'pkgver': '10.0.111-10.0.11-0ubuntu1~26.04.1'}
];

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_WARNING,
    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, 'aspnetcore-runtime-10.0 / aspnetcore-runtime-8.0 / etc');
}