Symantec Enterprise Firewall (SEF) username enumeration
| sef-username-enumeration (36081) |  Low Risk |
Description:
Symantec Enterprise Firewall (SEF) could allow a remote attacker to determine valid usernames, caused by different responses being sent to valid and invalid usernames. If the application is configured for remote access (client-to-gateway) VPN using pre-shared key (PSK) authentication, a remote attacker could exploit this vulnerability to enumerate valid usernames.
*CVSS:
| Base Score: | 2.1 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | None |
| Availability Impact: | None |
| Temporal Score: | 1.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Obtain Information
Remedy:
Refer to SYM07-023 for patch, upgrade, or suggested workaround information. See References.
References:
- SYM07-023 : Symantec Enterprise Firewall Username Enumeration.
- BID-25338: Symantec Enterprise Firewall Username Enumeration Weakness
- CVE-2007-4422: The login interface in Symantec Enterprise Firewall 6.x, when a VPN with pre-shared key (PSK) authentication is enabled, generates different responses depending on whether or not a username is valid, which allows remote attackers to enumerate valid usernames.
- OSVDB ID: 36489: Symantec Enterprise Firewall VPN PSK Authentication User Enumeration
- SA26511: Symantec Enterprise Firewall User Enumeration Weakness
- SECTRACK ID: 1018578: Symantec Enterprise Firewall Discloses Username Validity to Remote Users
- VUPEN/ADV-2007-2909: Symantec Enterprise Firewall Remote User Enumeration Security Weakness
Platforms Affected:
- Symantec Enterprise Firewall 8.0
- Symantec Gateway Security 1600 3.0.1
- Symantec Gateway Security 300 2.1
- Symantec Gateway Security 400 2.1
- Symantec Gateway Security 5000 3.0.1
Reported:
Aug 16, 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.