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F5 Networks BIG-IP : Expat XML library vulnerability (K70938105)

high Nessus Plugin ID 94301

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The XML parser in Expat does not use sufficient entropy for hash initialization, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted identifiers in an XML document. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0876. (CVE-2016-5300)

Impact

An attacker may be able to cause a denial-of-service (DoS) attack by way ofcrafted identifiers in an XML document.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K70938105.

See Also

https://support.f5.com/csp/article/K70938105

Plugin Details

Severity: High

ID: 94301

File Name: f5_bigip_SOL70938105.nasl

Version: 2.16

Type: local

Published: 10/27/2016

Updated: 3/10/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_acceleration_manager, cpe:/a:f5:big-ip_application_security_manager, cpe:/a:f5:big-ip_application_visibility_and_reporting, cpe:/a:f5:big-ip_global_traffic_manager, cpe:/a:f5:big-ip_link_controller, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/a:f5:big-ip_policy_enforcement_manager, cpe:/h:f5:big-ip, cpe:/h:f5:big-ip_protocol_security_manager

Required KB Items: Host/local_checks_enabled, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/26/2016

Vulnerability Publication Date: 7/3/2012

Reference Information

CVE: CVE-2012-0876, CVE-2016-5300

BID: 52379