Detections
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AIX : Multiple Vulnerabilities (IJ55268)

critical Nessus Plugin ID 242256

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Synopsis

The remote AIX host is missing a security patch.

Description

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.

Solution

Please apply the appropriate interim fix per APAR IJ55268.

See Also

https://www.ibm.com/support/pages/node/7239960

https://www.ibm.com/support/pages/apar/IJ55268

Plugin Details

Severity: Critical

ID: 242256

File Name: aix_IJ55268.nasl

Version: 1.1

Type: local

Published: 7/17/2025

Updated: 7/17/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:C

CVSS Score Source: CVE-2025-49796

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/AIX/version, Host/AIX/lslpp

Exploit Ease: No known exploits are available

Patch Publication Date: 7/17/2025

Vulnerability Publication Date: 6/12/2025

Reference Information

CVE: CVE-2025-49794, CVE-2025-49795, CVE-2025-49796, CVE-2025-6021