Google Gears allowCrossOrigin() cross-domain security bypass
| gears-allowcrossorigin-security-bypass (47173) |  Medium Risk |
Description:
Google Gears could allow a remote attacker to bypass cross-domain security restrictions, caused by improper validation of workers by the allowCrossOrigin() function. By persuading a victim to visit a specially-crafted Web page, a remote attacker could exploit this vulnerability to bypass cross-domain security restrictions and launch further attacks against the victim's system.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.7 |
| Exploitability: | High |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Upgrade to the latest version of Google Gears (0.5.4.2 or later), available from the Google Gears Web site. See References.
References:
- Google Code Web site: WorkerPool API - Gears API - Google Code.
- Google Gears Web site: Gears.
- IBM Rational Application Security Insider Blog: Breaking Google Gears' Cross-Origin Communication Model.
- BID-32698: Google Gears WorkerPool API 'allowCrossOrigin()' Same Origin Policy Violation Vulnerability
- CVE-2008-6512: Cross-domain vulnerability in the WorkerPool API in Google Gears before 0.5.4.2 allows remote attackers to bypass the Same Origin Policy and the intended access restrictions of the allowCrossOrigin function by hosting an assumed-safe file type containing Google Gear commands on the target domain, then accessing that file from the attacking domain, whose response headers are not checked and cause the worker code to run in the target domain.
- OSVDB ID: 56366: Google Gears WorkerPool API allowCrossOrigin Function SameOrigin Policy Bypass
- SA33062: Google Gears Cross-Site Scripting Weakness
Platforms Affected:
- Google Gears 0.1
- Google Gears 0.2
- Google Gears 0.3
- Google Gears 0.4
- Google Gears 0.5
Reported:
Dec 08, 2008
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* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.