AIX : Multiple Vulnerabilities (IJ55268)

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

include('compat.inc');

if (description)
{
  script_id(242256);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/07/17");

  script_cve_id(
    "CVE-2025-6021",
    "CVE-2025-49794",
    "CVE-2025-49795",
    "CVE-2025-49796"
  );

  script_name(english:"AIX : Multiple Vulnerabilities (IJ55268)");

  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 IJ55268. It is, therefore, affected by multiple
vulnerabilities as referenced in the IJ55268 advisory.

  - A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can
    trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that
    can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to
    sensitive data being corrupted in memory. (CVE-2025-49796)

  - A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under
    certain circumstances when the XML schematron has the <sch:name path=.../> schema elements. This flaw
    allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the
    program's crash using libxml or other possible undefined behaviors. (CVE-2025-49794)

  - A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This
    flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service.
    (CVE-2025-49795)

  - A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations
    can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of
    service when processing crafted input. (CVE-2025-6021)

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/7239960");
  script_set_attribute(attribute:"see_also", value:"https://www.ibm.com/support/pages/apar/IJ55268");
  script_set_attribute(attribute:"solution", value:
"Please apply the appropriate interim fix per APAR IJ55268.");
  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:U/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: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-2025-49796");

  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:"2025/06/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/07/17");

  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': '00', 'sp': '21', 'patch': 'IJ55268m3a', 'package': 'bos.rte.control', 'minfilesetver': '7.3.2.0', 'maxfilesetver': '7.3.2.3'},
    {'release': '4.1', 'ml': '00', 'sp': '30', 'patch': 'IJ55268m3a', 'package': 'bos.rte.control', 'minfilesetver': '7.3.2.0', 'maxfilesetver': '7.3.2.3'},
    {'release': '4.1', 'ml': '00', 'sp': '40', 'patch': 'IJ55268s4a', 'package': 'bos.rte.control', 'minfilesetver': '7.3.2.0', 'maxfilesetver': '7.3.2.3'},
    {'release': '7.3', 'ml': '02', 'sp': '02', 'patch': 'IJ55268m3a', 'package': 'bos.rte.control', 'minfilesetver': '7.3.2.0', 'maxfilesetver': '7.3.2.3'},
    {'release': '7.3', 'ml': '02', 'sp': '03', 'patch': 'IJ55268m3a', 'package': 'bos.rte.control', 'minfilesetver': '7.3.2.0', 'maxfilesetver': '7.3.2.3'},
    {'release': '7.3', 'ml': '02', 'sp': '04', 'patch': 'IJ55268s4a', 'package': 'bos.rte.control', 'minfilesetver': '7.3.2.0', 'maxfilesetver': '7.3.2.3'}
];

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");