Cisco ASA clientless VPN information disclosure

cisco-asa-clientlessvpn-info-disclosure (44870) The risk level is classified as LowLow Risk


Cisco ASA devices could allow a remote attacker to obtain sensitive information, caused by an error when configured to terminate clientless VPN connections. By persuading a victim to visit a malicious Web site, reply to an email, or interact with a service, an attacker could obtain usernames and passwords.


Base Score: 4.3
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
Temporal Score: 3.2
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed


Obtain Information


Refer to cisco-sa-20080903-asa for patch, upgrade or suggested workaround information. See References.


  • cisco-sa-20080903-asa: Cisco Security Advisory: Remote Access VPN and SIP Vulnerabilities in Cisco PIX and Cisco ASA.
  • BID-30998: Cisco PIX and Cisco ASA Multiple Denial of Service and Information Disclosure Vulnerabilities
  • CVE-2008-2736: Unspecified vulnerability in Cisco Adaptive Security Appliance (ASA) 5500 devices 8.0(3)15, 8.0(3)16, 8.1(1)4, and 8.1(1)5, when configured as a clientless SSL VPN endpoint, allows remote attackers to obtain usernames and passwords via unknown vectors, aka Bug ID CSCsq45636.
  • OSVDB ID: 47924: Cisco PIX / ASA Clientless VPN Termination Remote Information Disclosure
  • SA31730: Cisco ASA and PIX Security Appliances Multiple Vulnerabilities
  • SECTRACK ID: 1020813: Cisco ASA Clientless VPN Feature May Disclose Sensitive Information to Remote Users

Platforms Affected:

  • Cisco Adaptive Security Appliance 8.0
  • Cisco Adaptive Security Appliance 8.1


Sep 03, 2008

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