AIX : Multiple Vulnerabilities (IJ55695)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(270141);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/13");

  script_cve_id(
    "CVE-2025-49175",
    "CVE-2025-49176",
    "CVE-2025-49178",
    "CVE-2025-49179"
  );

  script_name(english:"AIX : Multiple Vulnerabilities (IJ55695)");

  script_set_attribute(attribute:"synopsis", value:
"The remote AIX host is missing a security patch.");
  script_set_attribute(attribute:"description", value:
"The version of AIX installed on the remote host is prior to APAR IJ55695. It is, therefore, affected by multiple
vulnerabilities as referenced in the IJ55695 advisory.

  - A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check
    for an integer overflow when computing request length, which allows a client to bypass length checks.
    (CVE-2025-49179)

  - A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no
    cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.
    (CVE-2025-49175)

  - A flaw was found in the Big Requests extension. The request length is multiplied by 4 before checking
    against the maximum allowed size, potentially causing an integer overflow and bypassing the size check.
    (CVE-2025-49176)

  - A flaw was found in the X server's request handling. Non-zero 'bytes to ignore' in a client's request can
    cause the server to skip processing another client's request, potentially leading to a denial of service.
    (CVE-2025-49178)

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://www.ibm.com/support/pages/node/7247777");
  script_set_attribute(attribute:"see_also", value:"https://www.ibm.com/support/pages/apar/IJ55695");
  script_set_attribute(attribute:"solution", value:
"Please apply the appropriate interim fix per APAR IJ55695.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/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-2025-49179");

  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:"2025/06/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/AIX/lslpp", "Host/local_checks_enabled", "Host/AIX/version");

  exit(0);
}

include('aix.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if ( ! get_kb_item('Host/AIX/version') ) audit(AUDIT_OS_NOT, "AIX");
if ( ! get_kb_item('Host/AIX/lslpp') ) audit(AUDIT_PACKAGE_LIST_MISSING);

if ( get_kb_item('Host/AIX/emgr_failure') ) exit(0, 'This iFix check is disabled because : ' + get_kb_item('Host/AIX/emgr_failure') );

var constraints = [
    {'release': '4.1', 'ml': '01', 'sp': '00', 'patch': 'IJ55695s1a', 'package': 'X11.base.rte', 'minfilesetver': '7.3.3.0', 'maxfilesetver': '7.3.3.0'},
    {'release': '4.1', 'ml': '01', 'sp': '10', 'patch': 'IJ55695s1a', 'package': 'X11.base.rte', 'minfilesetver': '7.3.3.0', 'maxfilesetver': '7.3.3.0'},
    {'release': '7.3', 'ml': '03', 'sp': '00', 'patch': 'IJ55695s1a', 'package': 'X11.base.rte', 'minfilesetver': '7.3.3.0', 'maxfilesetver': '7.3.3.0'},
    {'release': '7.3', 'ml': '03', 'sp': '01', 'patch': 'IJ55695s1a', 'package': 'X11.base.rte', 'minfilesetver': '7.3.3.0', 'maxfilesetver': '7.3.3.0'}
];

var flag = 0;
foreach var constraint (constraints) {
    var release = constraint['release'];
    var ml = constraint['ml'];
    var sp = constraint['sp'];
    var patch = constraint['patch'];
    var package = constraint['package'];
    var minfilesetver = constraint['minfilesetver'];
    var maxfilesetver = constraint['maxfilesetver'];
    if(aix_check_ifix(release: release, ml: ml, sp: sp, patch: patch, package: package, minfilesetver: minfilesetver, maxfilesetver: maxfilesetver) < 0) flag++;
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : aix_report_get()
  );
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected - AIX");