Vulnerabilities > CVE-2016-0120 - Improper Input Validation vulnerability in Microsoft products

047910
CVSS 7.1 - HIGH
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
COMPLETE
network
microsoft
CWE-20
nessus
exploit available

Summary

The Adobe Type Manager Library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allows remote attackers to cause a denial of service (system hang) via a crafted OpenType font, aka "OpenType Font Parsing Vulnerability." Per Microsoft: "For systems running Windows 10, an attacker who successfully exploited the vulnerability could potentially cause the application to stop responding instead of the system."

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Exploit-Db

descriptionWindows Kernel ATMFD.DLL OTF Font Processing Stack Corruption (MS16-026). CVE-2016-0120. Dos exploit for windows platform
fileexploits/windows/dos/39561.txt
idEDB-ID:39561
last seen2016-03-16
modified2016-03-14
platformwindows
port
published2016-03-14
reporterGoogle Security Research
sourcehttps://www.exploit-db.com/download/39561/
titleWindows Kernel ATMFD.DLL OTF Font Processing Stack Corruption MS16-026
typedos

Msbulletin

bulletin_idMS16-026
bulletin_url
date2016-03-08T00:00:00
impactRemote Code Execution
knowledgebase_id3143148
knowledgebase_url
severityCritical
titleSecurity Update for Graphic Fonts to Address Remote Code Execution

Nessus

NASL familyWindows : Microsoft Bulletins
NASL idSMB_NT_MS16-026.NASL
descriptionThe remote Windows host is affected by multiple vulnerabilities in the Adobe Type Manager Library : - A denial of service vulnerability exists due to improper handling of OpenType fonts. A remote attacker can exploit this vulnerability by convincing a user to open a file or visit a website containing specially crafted embedded OpenType fonts, resulting in a denial of service condition. (CVE-2016-0120) - A remote code execution vulnerability exists due to improper handling of specially crafted fonts. A remote attacker can exploit this vulnerability by convincing a user to open a file or visit a website containing specially crafted embedded OpenType fonts, resulting in the execution of arbitrary code in the context of the current user. (CVE-2016-0121)
last seen2020-06-01
modified2020-06-02
plugin id89749
published2016-03-08
reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/89749
titleMS16-026: Security Update for Graphic Fonts to Address Remote Code Execution (3143148)