var-200708-0308
Vulnerability from variot
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. Symantec Enterprise Firewall is prone to a username-enumeration weakness. An attacker can exploit this issue to enumerate valid user names. This may aid in further attacks. There is a loophole in the processing of certain authentication requests in SEP, and a remote attacker may use this loophole to brute-force guess a valid user name.
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TITLE: Symantec Enterprise Firewall User Enumeration Weakness
SECUNIA ADVISORY ID: SA26511
VERIFY ADVISORY: http://secunia.com/advisories/26511/
CRITICAL: Not critical
IMPACT: Exposure of sensitive information
WHERE:
From remote
SOFTWARE: Symantec Enterprise Firewall 6.x http://secunia.com/product/15339/
DESCRIPTION: A weakness has been reported in Symantec Enterprise Firewall, which can be exploited by malicious people to determine valid usernames.
The problem is that a different response is sent when using a valid or invalid username and can be exploited to determine valid usernames.
Successful exploitation requires that the application is configured for remote access (client-to-gateway) VPN using pre-shared key (PSK) authentication.
The weakness is reported in version 6.x.
SOLUTION: The vendor recommends adding the "default-ikeuser" username. Please see the vendor's advisory for details.
PROVIDED AND/OR DISCOVERED BY: The vendor credits Roy Hill, NTA Monitor Ltd.
ORIGINAL ADVISORY: http://securityresponse.symantec.com/avcenter/security/Content/2007.08.16.html
About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.
Subscribe: http://secunia.com/secunia_security_advisories/
Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/
Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor.
Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.