Debian dla-4682 : redis - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-4682. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(326665);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/14");

  script_cve_id("CVE-2026-23631", "CVE-2026-25243");
  script_xref(name:"IAVA", value:"2026-A-0426");

  script_name(english:"Debian dla-4682 : redis - 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 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4682 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4682-1                [email protected]
    https://www.debian.org/lts/security/                           Chris Lamb
    July 13, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : redis
    Version        : 5:7.0.15-1~deb12u8
    CVE ID         : CVE-2026-23631 CVE-2026-25243

    It was discovered that there were two issues in Redis, the in-memory
    key/value database:

    CVE-2026-23631

        An authenticated attacker could have exploited the master-replica
        synchronization mechanism to trigger a use-after-free on replicas
        where replica-read-only is disabled (or could be disabled),
        which may have led to remote code execution. Installations that
        prevent users from executing Lua scripts were unaffected.

    CVE-2026-25243

        The RESTORE command did not properly validate serialized values.
        An authenticated attacker with permission to execute RESTORE
        could have suppled a crafted serialized payload that triggers
        invalid memory access and this could have led to remote code
        execution.

    For Debian 12 bookworm, these problems have been fixed in version
    5:7.0.15-1~deb12u8.

    We recommend that you upgrade your redis packages.

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

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

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/redis");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-23631");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-25243");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/redis");
  script_set_attribute(attribute:"solution", value:
"Upgrade the redis 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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-25243");

  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:"2026/05/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:redis");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:redis-sentinel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:redis-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:redis-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  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) 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]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0', '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': 'redis', 'reference': '5:7.0.15-1~deb12u8'},
    {'release': '12.0', 'prefix': 'redis-sentinel', 'reference': '5:7.0.15-1~deb12u8'},
    {'release': '12.0', 'prefix': 'redis-server', 'reference': '5:7.0.15-1~deb12u8'},
    {'release': '12.0', 'prefix': 'redis-tools', 'reference': '5:7.0.15-1~deb12u8'}
];

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