AlmaLinux 10 : rsync (ALSA-2026:67463)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2026:67463.
##

include('compat.inc');

if (description)
{
  script_id(345931);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/15");

  script_cve_id(
    "CVE-2026-53783",
    "CVE-2026-53784",
    "CVE-2026-53785",
    "CVE-2026-53789",
    "CVE-2026-53790",
    "CVE-2026-53791",
    "CVE-2026-53793",
    "CVE-2026-53795",
    "CVE-2026-53802",
    "CVE-2026-53803",
    "CVE-2026-70452",
    "CVE-2026-70453",
    "CVE-2026-70454",
    "CVE-2026-70455",
    "CVE-2026-70456",
    "CVE-2026-70457",
    "CVE-2026-70458",
    "CVE-2026-70460",
    "CVE-2026-70461",
    "CVE-2026-70463",
    "CVE-2026-70464"
  );
  script_xref(name:"ALSA", value:"2026:67463");
  script_xref(name:"RHSA", value:"2026:67463");

  script_name(english:"AlmaLinux 10 : rsync (ALSA-2026:67463)");

  script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-2026:67463 advisory.

    * rsync: rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink (CVE-2026-70460)
      * rsync: rsync: TLS Certificate Validation Bypass allows interception of encrypted sessions
    (CVE-2026-70454)
      * rsync: rsync: Arbitrary file deletion via malicious file list (CVE-2026-53789)
      * rsync: rsync < 3.5.0 Command Injection via Multiple Code Paths (CVE-2026-53790)
      * rsync: rsync: Memory corruption via crafted file entries (CVE-2026-70458)
      * rsync: rsync: Denial of Service via handshake stall (CVE-2026-70464)
      * rsync: rsync: Local Privilege Escalation via Symlink Following (CVE-2026-53803)
      * rsync: rsync: Unauthorized File Access via Symlink Module Root (CVE-2026-53784)
      * rsync: rsync: Authorization bypass via `auth users` directive parsing (CVE-2026-70463)
      * rsync: rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure (CVE-2026-70452)
      * rsync: rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header (CVE-2026-53791)
      * rsync: rsync: Arbitrary file write via --temp-dir or --link-dest options (CVE-2026-53795)
      * rsync: rsync: Heap Out-of-Bounds Write via crafted argument list (CVE-2026-70456)
      * rsync: rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode (CVE-2026-53793)
      * rsync: rsync: Denial of Service via Algorithmic Complexity (CVE-2026-70453)
      * rsync: rsync: Denial of Service via Zstandard compression thread exhaustion (CVE-2026-70455)
      * rsync: rsync: Memory corruption via out-of-bounds write in size parsing (CVE-2026-70457)
      * rsync: rsync: Information disclosure and denial of service via crafted files-from entry
    (CVE-2026-70461)
      * rsync: rsync: Arbitrary File Read via Symlink Following (CVE-2026-53802)
      * rsync: rsync: Arbitrary file write via path traversal in --relative mode (CVE-2026-53785)
      * rsync: rsync: Directory escape via TOCTOU race condition in rrsync (CVE-2026-53783)


    Bug Fix(es) and Enhancement(s):

      * Rebase rsync to version 3.5.0 in AlmaLinux10 (JIRA:AlmaLinux-246094)

Tenable has extracted the preceding description block directly from the AlmaLinux 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://errata.almalinux.org/10/ALSA-2026-67463.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2026:67463");
  script_set_attribute(attribute:"solution", value:
"Update the affected rsync, rsync-daemon and / or rsync-rrsync packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/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:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-53789");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-70457");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-70460");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(22, 290, 295, 59, 636, 770, 78, 787, 863);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rsync");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rsync-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rsync-rrsync");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::appstream");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::baseos");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::highavailability");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::nfv");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::powertools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::realtime");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::resilientstorage");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::sap");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::sap_hana");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:10::supplementary");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Alma Linux 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/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'AlmaLinux' >!< os_product) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
if (! preg(pattern:"^10([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'AlmaLinux 10.x', 'AlmaLinux ' + os_version);

if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'ppc' >!< cpu && 's390' >!< cpu && 'x86_64' >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);

var constraints = [
  {
    'release': '10',
    'pkgs': [
      {'reference':'rsync-3.5.0-3.el10_2', 'cpu':'aarch64', 'el_string':'el10_2', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'rsync-3.5.0-3.el10_2', 'cpu':'ppc64le', 'el_string':'el10_2', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'rsync-3.5.0-3.el10_2', 'cpu':'s390x', 'el_string':'el10_2', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'rsync-3.5.0-3.el10_2', 'cpu':'x86_64', 'el_string':'el10_2', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'rsync-3.5.0-3.el10_2', 'cpu':'x86_64_v2', 'el_string':'el10_2', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'rsync-daemon-3.5.0-3.el10_2', 'el_string':'el10_2', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'rsync-rrsync-3.5.0-3.el10_2', 'el_string':'el10_2', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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, 'rsync / rsync-daemon / rsync-rrsync');
}