Vulnerability 56853 - CERT Civis.Net

Vulnerability Name:

CCN-56853

Published:

2010-03-10

Updated:

2010-03-10

Summary:

Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by improper handling of CHM files placed in the root directory when a relative path is received as an argument by the MS HTML Help ActiveX control (hhctrl.ocx) HtmlHelpA() function. By persuading a victim to open a specially-crafted TXT file located in a remote network share, press the "F1" key, and then select a topic, an attacker could exploit this vulnerability to execute arbitrary JavaScript code in a local machine security zone.

CVSS v3 Severity:

5.6 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): Low Integrity (I): Low Availibility (A): Low

CVSS v2 Severity:

5.1 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P)
4.8 Medium (CCN Temporal CVSS v2 Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P/E:H/RL:U/RC:UR)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): High Athentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial