Rocky Linux 8 : redis:6 (RLSA-2021:2034)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# Rocky Linux Security Advisory RLSA-2021:2034.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(157734);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/07");

  script_cve_id("CVE-2021-29477");
  script_xref(name:"RLSA", value:"2021:2034");

  script_name(english:"Rocky Linux 8 : redis:6 (RLSA-2021:2034)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Rocky Linux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the
RLSA-2021:2034 advisory.

  - Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and
    message broker. An integer overflow bug in Redis version 6.0 or newer could be exploited using the
    `STRALGO LCS` command to corrupt the heap and potentially result with remote code execution. The problem
    is fixed in version 6.2.3 and 6.0.13. An additional workaround to mitigate the problem without patching
    the redis-server executable is to use ACL configuration to prevent clients from using the `STRALGO LCS`
    command. (CVE-2021-29477)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://errata.rockylinux.org/RLSA-2021:2034");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1957410");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/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: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-2021-29477");

  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:"2021/05/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/07/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:redis");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:redis-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:redis-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:redis-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:redis-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:rocky:linux:8");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RockyLinux/release", "Host/RockyLinux/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RockyLinux/release');
if (isnull(os_release) || 'Rocky Linux' >!< os_release) audit(AUDIT_OS_NOT, 'Rocky Linux');
var os_ver = pregmatch(pattern: "Rocky(?: Linux)? release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Rocky Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Rocky Linux 8.x', 'Rocky Linux ' + os_ver);

if (!get_kb_item('Host/RockyLinux/rpm-list')) 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, 'Rocky Linux', cpu);

var module_ver = get_kb_item('Host/RockyLinux/appstream/redis');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module redis:6');
if ('6' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module redis:' + module_ver);

var appstreams = {
    'redis:6': [
      {'reference':'redis-6.0.9-3.module+el8.4.0+395+8d498eeb', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'redis-6.0.9-3.module+el8.4.0+395+8d498eeb', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'redis-debuginfo-6.0.9-3.module+el8.4.0+395+8d498eeb', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'redis-debuginfo-6.0.9-3.module+el8.4.0+395+8d498eeb', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'redis-debugsource-6.0.9-3.module+el8.4.0+395+8d498eeb', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'redis-debugsource-6.0.9-3.module+el8.4.0+395+8d498eeb', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'redis-devel-6.0.9-3.module+el8.4.0+395+8d498eeb', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'redis-devel-6.0.9-3.module+el8.4.0+395+8d498eeb', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'redis-doc-6.0.9-3.module+el8.4.0+395+8d498eeb', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
    ]
};

var flag = 0;
var appstreams_found = 0;
foreach var module (keys(appstreams)) {
  var appstream = NULL;
  var appstream_name = NULL;
  var appstream_version = NULL;
  var appstream_split = split(module, sep:':', keep:FALSE);
  if (!empty_or_null(appstream_split)) {
    appstream_name = appstream_split[0];
    appstream_version = appstream_split[1];
    if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/RockyLinux/appstream/' + appstream_name);
  }
  if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
    appstreams_found++;
    foreach var package_array ( appstreams[module] ) {
      var reference = NULL;
      var _release = NULL;
      var sp = NULL;
      var _cpu = NULL;
      var el_string = NULL;
      var rpm_spec_vers_cmp = NULL;
      var epoch = NULL;
      var allowmaj = NULL;
      var exists_check = NULL;
      if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
      if (!empty_or_null(package_array['release'])) _release = 'Rocky-' + package_array['release'];
      if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
      if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
      if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
      if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
      if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
      if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
      if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
      if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
        if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
      }
    }
  }
}

if (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module redis:6');

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'redis / redis-debuginfo / redis-debugsource / redis-devel / etc');
}