Oracle Linux 8 : libxml2 (ELSA-2023-4529)

medium Nessus Plugin ID 179859

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Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-4529 advisory.

- In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c. (CVE-2023-28484)

- An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value). (CVE-2023-29469)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected libxml2, libxml2-devel and / or python3-libxml2 packages.

Plugin Details

Severity: Medium

ID: 179859

File Name: oraclelinux_ELSA-2023-4529.nasl

Version: 1.1

Type: local

Agent: unix

Family: Oracle Linux Local Security Checks

Published: 8/15/2023

Updated: 10/24/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2023-29469

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

Vulnerability Information

CPE: cpe:/a:oracle:linux:8::appstream, cpe:/o:oracle:linux:8, cpe:/o:oracle:linux:8:8:baseos_patch, cpe:/o:oracle:linux:8::baseos_latest, p-cpe:/a:oracle:linux:libxml2, p-cpe:/a:oracle:linux:libxml2-devel, p-cpe:/a:oracle:linux:python3-libxml2

Required KB Items: Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/10/2023

Vulnerability Publication Date: 4/13/2023

Reference Information

CVE: CVE-2023-28484, CVE-2023-29469

IAVA: 2023-A-0559

Detections

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