Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM / 22.04 ESM : Redis vulnerabilities (USN-6531-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6531-1. 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(186586);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/20");

  script_cve_id(
    "CVE-2022-24834",
    "CVE-2022-35977",
    "CVE-2022-36021",
    "CVE-2023-25155",
    "CVE-2023-28856",
    "CVE-2023-45145"
  );
  script_xref(name:"USN", value:"6531-1");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM / 22.04 ESM : Redis vulnerabilities (USN-6531-1)");

  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 16.04 ESM / 18.04 ESM / 20.04 ESM / 22.04 ESM host has packages installed that are affected by
multiple vulnerabilities as referenced in the USN-6531-1 advisory.

  - Redis is an in-memory database that persists on disk. A specially crafted Lua script executing in Redis
    can trigger a heap overflow in the cjson library, and result with heap corruption and potentially remote
    code execution. The problem exists in all versions of Redis with Lua scripting support, starting from 2.6,
    and affects only authenticated and authorized users. The problem is fixed in versions 7.0.12, 6.2.13, and
    6.0.20. (CVE-2022-24834)

  - Redis is an in-memory database that persists on disk. Authenticated users issuing specially crafted
    `SETRANGE` and `SORT(_RO)` commands can trigger an integer overflow, resulting with Redis attempting to
    allocate impossible amounts of memory and abort with an out-of-memory (OOM) panic. The problem is fixed in
    Redis versions 7.0.8, 6.2.9 and 6.0.17. Users are advised to upgrade. There are no known workarounds for
    this vulnerability. (CVE-2022-35977)

  - Redis is an in-memory database that persists on disk. Authenticated users can use string matching commands
    (like `SCAN` or `KEYS`) with a specially crafted pattern to trigger a denial-of-service attack on Redis,
    causing it to hang and consume 100% CPU time. The problem is fixed in Redis versions 6.0.18, 6.2.11,
    7.0.9. (CVE-2022-36021)

  - Redis is an in-memory database that persists on disk. Authenticated users issuing specially crafted
    `SRANDMEMBER`, `ZRANDMEMBER`, and `HRANDFIELD` commands can trigger an integer overflow, resulting in a
    runtime assertion and termination of the Redis server process. This problem affects all Redis versions.
    Patches were released in Redis version(s) 6.0.18, 6.2.11 and 7.0.9. (CVE-2023-25155)

  - Redis is an open source, in-memory database that persists on disk. Authenticated users can use the
    `HINCRBYFLOAT` command to create an invalid hash field that will crash Redis on access in affected
    versions. This issue has been addressed in in versions 7.0.11, 6.2.12, and 6.0.19. Users are advised to
    upgrade. There are no known workarounds for this issue. (CVE-2023-28856)

  - Redis is an in-memory database that persists on disk. On startup, Redis begins listening on a Unix socket
    before adjusting its permissions to the user-provided configuration. If a permissive umask(2) is used,
    this creates a race condition that enables, during a short period of time, another process to establish an
    otherwise unauthorized connection. This problem has existed since Redis 2.6.0-RC1. This issue has been
    addressed in Redis versions 7.2.2, 7.0.14 and 6.2.14. Users are advised to upgrade. For users unable to
    upgrade, it is possible to work around the problem by disabling Unix sockets, starting Redis with a
    restrictive umask, or storing the Unix socket file in a protected directory. (CVE-2023-45145)

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-6531-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/AC:L/PR:L/UI:N/S:U/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-2022-24834");

  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:"2023/01/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/12/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/12/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:redis");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:redis-sentinel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:redis-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:redis-tools");
  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) 2023 Canonical, Inc. / NASL script (C) 2023 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04', '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': '16.04', 'pkgname': 'redis-sentinel', 'pkgver': '2:3.0.6-1ubuntu0.4+esm2'},
    {'osver': '16.04', 'pkgname': 'redis-server', 'pkgver': '2:3.0.6-1ubuntu0.4+esm2'},
    {'osver': '16.04', 'pkgname': 'redis-tools', 'pkgver': '2:3.0.6-1ubuntu0.4+esm2'},
    {'osver': '18.04', 'pkgname': 'redis', 'pkgver': '5:4.0.9-1ubuntu0.2+esm4'},
    {'osver': '18.04', 'pkgname': 'redis-sentinel', 'pkgver': '5:4.0.9-1ubuntu0.2+esm4'},
    {'osver': '18.04', 'pkgname': 'redis-server', 'pkgver': '5:4.0.9-1ubuntu0.2+esm4'},
    {'osver': '18.04', 'pkgname': 'redis-tools', 'pkgver': '5:4.0.9-1ubuntu0.2+esm4'},
    {'osver': '20.04', 'pkgname': 'redis', 'pkgver': '5:5.0.7-2ubuntu0.1+esm2'},
    {'osver': '20.04', 'pkgname': 'redis-sentinel', 'pkgver': '5:5.0.7-2ubuntu0.1+esm2'},
    {'osver': '20.04', 'pkgname': 'redis-server', 'pkgver': '5:5.0.7-2ubuntu0.1+esm2'},
    {'osver': '20.04', 'pkgname': 'redis-tools', 'pkgver': '5:5.0.7-2ubuntu0.1+esm2'},
    {'osver': '22.04', 'pkgname': 'redis', 'pkgver': '5:6.0.16-1ubuntu1+esm1'},
    {'osver': '22.04', 'pkgname': 'redis-sentinel', 'pkgver': '5:6.0.16-1ubuntu1+esm1'},
    {'osver': '22.04', 'pkgname': 'redis-server', 'pkgver': '5:6.0.16-1ubuntu1+esm1'},
    {'osver': '22.04', 'pkgname': 'redis-tools', 'pkgver': '5:6.0.16-1ubuntu1+esm1'}
];

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, 'redis / redis-sentinel / redis-server / redis-tools');
}