Websense Enterprise User-Agent security bypass
| websense-useragent-security-bypass (39023) |  Medium Risk |
Description:
Websense Enterprise could allow a remote attacker from within a local network to bypass security restrictions, caused by the improper filtering of HTTP requests. A remote attacker could send a specially-crafted HTTP request containing a spoofed User-Agent header to bypass URL filtering restrictions and gain unauthorized access to restricted pages.
*CVSS:
| Base Score: | 5.8 |
| Access Vector: | Adjacent Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 4.3 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Refer to Websense database #92938 for patch, available from the Websense Web site. See References.
References:
- BugTraq Mailing List, Thu Dec 13 2007 - 08:49:08 CST : RE: [Full-disclosure] Fwd: Websense 6.3.1 Filtering Bypass.
- Mr.HinkyDink's UT Blog: Websense Policy Filtering Bypass.
- Websense Web site: How can I ensure that Websense Enterprise filters "all" requests (URL requests and tunneled protocol requests)?.
- BID-26847: Websense User-Agent Spoofing Filtering Security Bypass Vulnerability
- CVE-2007-6511: Websense Enterprise 6.3.1 allows remote attackers to bypass content filtering by visiting http URLs with a (1) RealPlayer G2, (2) MSMSGS, or (3) StoneHttpAgent User-Agent header, which results in a Non-HTTP categorization.
- SA28026: Websense User-Agent Filtering Bypass Security Issue
- SECTRACK ID: 1019094: Websense Enterprise Lets Remote Users Bypass Web Filtering With Modified User-Agent Values
- VUPEN/ADV-2007-4210: Websense User-Agent HTTP Header URL Filtering Bypass Vulnerability
Platforms Affected:
- Websense Websense Enterprise 6.3.1
Reported:
Dec 12, 2007
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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.