Debian dsa-5983 : qemu-block-extra - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5983. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(254417);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/24");

  script_cve_id("CVE-2025-54566", "CVE-2025-54567");
  script_xref(name:"IAVB", value:"2025-B-0143-S");

  script_name(english:"Debian dsa-5983 : qemu-block-extra - 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 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5983 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-5983-1                   [email protected]
    https://www.debian.org/security/                       Moritz Muehlenhoff
    August 22, 2025                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : qemu
    CVE ID         : CVE-2025-54566 CVE-2025-54567

    This update removes the usage of the C (Credential) flag for the
    binfmt_misc registration within the qemu-user package, as it allowed for
    privilege escalation when running a suid/sgid binary under qemu-user.
    This means suid/sgid foreign-architecture binaries are not running with
    elevated privileges under qemu-user anymore.  If you relied on this
    behavior of qemu-user in the past (running suid/sgid foreign-arch
    binaries), this will require changes to your deployment.

    In Bookworm the affected packages are qemu-user-static (and
    qemu-user-binfmt) instead of qemu-user.

    Additionally, two security issues were fixed the in SR-IOV support
    of QEMU system emulation.

    For the oldstable distribution (bookworm), these problems have been fixed
    in version 1:7.2+dfsg-7+deb12u15.

    For the stable distribution (trixie), these problems have been fixed in
    version 1:10.0.2+ds-2+deb13u1.

    We recommend that you upgrade your qemu packages.

    For the detailed security status of qemu please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/qemu

    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/

    Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian 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://security-tracker.debian.org/tracker/source-package/qemu");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-54566");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-54567");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/qemu");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/trixie/qemu");
  script_set_attribute(attribute:"solution", value:
"Upgrade the qemu-block-extra packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:H/Au:N/C:N/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-54567");

  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:"2025/07/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/08/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-block-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-gui");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-mips");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-misc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-modules-opengl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-modules-spice");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-ppc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-riscv");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-s390x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-sparc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-x86");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-user-binfmt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-user-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  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:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2025-2026 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:"^(12)\.[0-9]+|^(13)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0 / 13.0', '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': '12.0', 'prefix': 'qemu-block-extra', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-guest-agent', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-arm', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-common', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-data', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-gui', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-mips', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-misc', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-ppc', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-sparc', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-x86', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-system-xen', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-user', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-user-binfmt', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-user-static', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '12.0', 'prefix': 'qemu-utils', 'reference': '1:7.2+dfsg-7+deb12u15'},
    {'release': '13.0', 'prefix': 'qemu-block-extra', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-guest-agent', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-arm', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-common', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-data', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-gui', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-mips', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-misc', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-modules-opengl', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-modules-spice', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-ppc', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-riscv', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-s390x', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-sparc', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-x86', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-system-xen', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-user', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-user-binfmt', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-user-static', 'reference': '1:10.0.2+ds-2+deb13u1'},
    {'release': '13.0', 'prefix': 'qemu-utils', 'reference': '1:10.0.2+ds-2+deb13u1'}
];

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_NOTE,
    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, 'qemu-block-extra / qemu-guest-agent / qemu-system / qemu-system-arm / etc');
}