Citrix XenApp Online Plug-in / Receiver Crafted Certificate MitM Spoofing Weakness

medium Nessus Plugin ID 42961

Synopsis

A client application installed on the remote Windows host is affected by a man-in-the-middle vulnerability.

Description

The version of Citrix Online Plug-in or ICA Client installed on the remote Windows host is affected by an unspecified man-in-the-middle (MitM) vulnerability. This issue is related to Microsoft security bulletin MS09-056 and is likely due to a failure to detect null bytes in the common name of a server certificate. A remote attacker can exploit this issue to perform a man-in-the-middle attack, allowing the attacker to read or modify SSL/TLS traffic being sent to and from the host.

This plugin only checks the ICA Client running on Windows, though other platforms are affected.

Solution

Upgrade to Citrix Online Plug-in or Citrix ICA Client version 11.0.150 / 11.2.0 or later.

See Also

https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2009/ms09-056

https://support.citrix.com/article/CTX123248

Plugin Details

Severity: Medium

ID: 42961

File Name: citrix_ica_client_ssl_mitm.nasl

Version: 1.17

Type: local

Agent: windows

Family: Windows

Published: 12/1/2009

Updated: 11/15/2018

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.5

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/a:citrix:online_plug-in_for_windows

Required KB Items: SMB/Registry/Enumerated, SMB/name, SMB/login, SMB/password, SMB/transport

Exploit Ease: No known exploits are available

Patch Publication Date: 11/9/2009

Vulnerability Publication Date: 11/9/2009

Reference Information

CVE: CVE-2009-3936

BID: 37073

CWE: 310

Secunia: 37319